China LINK-PP INT'L TECHNOLOGY CO., LIMITED Company News

1. Background and Evolution   The IEEE 802.3 standard defines Ethernet at both the Media Access Control (MAC) and Physical (PHY) layers. It underpins the design and implementation of wired LANs globally, spanning speeds from 1 Mb/s to 400 Gb/s. The foundational MAC protocol uses CSMA/CD in shared environments and full-duplex operation when switched—maintaining compatibility across revisions and including updates for link aggregation, Energy-Efficient Ethernet (EEE), and PoE types.     2. Key IEEE 802.3 Physical Layer Variants   IEEE 802.3ab (1000BASE-T) – Ratified in 1999, this Gigabit Ethernet standard enables 1 Gbps over Cat 5/5e/6 UTP cables using four pairs, PAM-5 encoding, and echo cancellation techniques. Typical link length is 100 meters. IEEE 802.3z (1000BASE-X and variants) – Approved in 1998, this optical-fiber-based Gigabit standard comprises 1000BASE-SX (multi-mode), LX (single-mode), and CX (shielded copper short runs).     3. Ethernet Speed Scale & Extensions   Starting from 10BASE-T (10 Mbps), the standard evolved through Fast Ethernet and Gigabit Ethernet, progressing to 10GBASE-T, 40/100G, and up to 400 Gbit/s. Notable milestone:   IEEE 802.3ba (2010) – Introduced 40 Gbps and 100 Gbps variants over optical and copper backplanes.     4. Energy-Efficient Ethernet (EEE)   IEEE 802.3az (2010) – Formalized low-power idle states in PHYs to cut energy consumption during low traffic periods, preserving compatibility with existing hardware.     5. Power over Ethernet (PoE) Standards   Ethernet standards now include power delivery over twisted-pair cabling:   IEEE 802.3af (PoE, 2003) – Supplies up to 15.4 W per port; guarantees 12.95 W at the device (PD). IEEE 802.3at (PoE+, 2009) – Boosts output to 30 W, with 25.5 W delivered to the PD; backward compatible with 802.3af. IEEE 802.3bt (PoE++, Type 3 & 4, 2018) – Offers up to 90 W using all four pairs: Type 3 ≈ 51 W, Type 4 ≈ 71–90 W. Single-pair PoE (PoDL) for automotive/industrial applications was standardized in IEEE 802.3bu (2016).     6. Link Aggregation and Auto-Negotiation     Link Aggregation: Initially defined by IEEE 802.3ad (2000), link aggregation enables multiple physical Ethernet ports to be combined into a single logical link, providing both bandwidth scaling and redundancy. Note: Since 2008, the standard has been transferred to IEEE 802.1AX, which has fully superseded 802.3ad. The 802.3ad specification is now obsolete and no longer maintained as an independent standard.   Auto-Negotiation: Auto-negotiation allows devices to automatically determine and select the highest mutually supported speed and duplex mode (e.g., 40G → 25G → 10G → 1000BASE-T).     7. Why IEEE 802.3 Matters in Network Design   Interoperability across device manufacturers. Scalability, supporting upgrades from Mb to Tb speeds. Unified MAC architecture, consistent management across speeds. Continuous innovation: higher throughput, energy savings, and integrated PoE.     8. LINK-PP and IEEE 802.3 Compliance   LINK-PP designs and manufactures PoE RJ45 connectors and PoE LAN transformers that fully comply with IEEE 802.3 specifications, ensuring reliable performance, compatibility, and safety in enterprise and industrial applications. This compliance guarantees that LINK-PP products integrate seamlessly into standard Ethernet networks while delivering high efficiency for PoE-powered devices.     Summary Table of Key IEEE 802.3 Variants   Standard Year Feature 802.3ab (1000BASE-T) 1999 Gigabit Ethernet over Cat5e/6 UTP 802.3z (1000BASE-X) 1998 Gigabit over fiber or shielded copper 802.3ba 2010 40G/100G Ethernet variants 802.3az 2010 Energy-Efficient Ethernet (EEE) 802.3af (PoE) 2003 15.4 W power delivery 802.3at (PoE+) 2009 Up to 30 W 802.3bt (PoE++) 2018 Up to 90 W using four pairs 802.3bu (PoDL) 2016 Single-pair PoE for automotive/IIoT 802.1AX (formerly 802.3ad) 2008 (replaces 802.3ad) Link aggregation and redundancy     Conclusion   From early Fast Ethernet to modern multi-hundred-gigabit backbones, the IEEE 802.3 standard remains the backbone of wired LANs. Its continuous expansion—embracing higher speeds, efficiency enhancements, PoE capabilities, and multiport aggregation—keeps networks robust, interoperable, and future-ready. Engineers designing network infrastructure must master IEEE 802.3’s various variants to optimize performance, manage power delivery, and ensure long-term scalability.

  In modern network equipment design, Power over Ethernet (PoE) has become a core solution for delivering both data and power over a single cable. As the gateway between the device and the network, an integrated RJ45 Connector must ensure stable high-speed data transmission while safely carrying significant electrical current.   For PCB layout engineers, understanding the rated current—and how it relates to PoE standards—is critical for ensuring product reliability, safety, and longevity.   ☛ Browse PoE RJ45 Connector Series     1. Why Rated Current Matters in PoE MagJacks   The rated current (typically specified per contact) defines the maximum safe continuous current the connector can handle under specified ambient temperature and allowable temperature rise. In pure data mode: Standard Gigabit Ethernet without PoE typically draws less than 100 mA per pair—well below the connector’s electrical limits. In PoE mode: IEEE 802.3 standards significantly increase the current load, especially for PoE++ (802.3bt Type 3/4), which approaches the thermal and mechanical limits of the contact system. Under-rating → Excessive heat → Contact degradation → System failure risk   No safety margin → Reduced reliability in high-temperature or dense PCB layouts     2. IEEE PoE Standards vs. Rated Current Requirements   PoE Type Max Delivered Power (PD) Typical Voltage Max Current per Pair Number of Pairs Total Current IEEE 802.3af (PoE) 12.95 W 44–57 V 0.35 A 2 0.7 A IEEE 802.3at (PoE+) 25.5 W 50–57 V 0.6 A 2 1.2 A IEEE 802.3bt Type 3 51 W 50–57 V 0.6 A 4 2.4 A IEEE 802.3bt Type 4 71.3 W 52–57 V 0.96 A 4 3.84 A     Note: IEEE defines limits per twisted pair, not just total current. This approach ensures consistent connector qualification and thermal safety margins.     3. Key Factors Affecting MagJack Rated Current   A. Contact Material & Plating High-conductivity copper alloy with ≥50 μin gold plating improves conductivity and reduces contact resistance.   B. Mechanical Design Contact cross-section, spacing, and heat dissipation pathways directly influence current capacity.   C. Operating Environment Elevated ambient temperatures or tightly packed enclosures increase thermal stress, requiring extra current margin.   D. System-Level Matching PCB trace width, transformer parameters, and Ethernet cable gauge (AWG) all affect the overall thermal profile.     4. Selection Guidelines   Design for Margin: Choose connectors rated at least 20% above the standard requirement to account for real-world conditions. Check Datasheet Conditions: Confirm that the rating is based on 25 °C ambient with ≤20 °C temperature rise. For PoE++: Select models certified for IEEE 802.3bt Type 3/4 (≥0.6 A or ≥0.96 A per pair). Evaluate the Entire Power Path: Consider cable, PCB, and transformer contributions to total heat generation.     5. Example: High-Margin PoE+ MagJack The LINK-PP LPJG0926HENL.pdf is a prime example:   Fully compliant with IEEE 802.3at (PoE+) Rated 720 mA per contact @ 57 VDC (continuous), exceeding the 0.6 A per pair requirement of PoE+ with around 20% margin Designed for high-density switches, industrial control, and embedded network devices Meets UL safety and RoHS environmental standards   ☛  View more PoE RJ45 Connector Product Options     6. Conclusion   For layout engineers and professional buyers, the rated current of a PoE MagJack is not just a number—it’s a critical parameter that impacts thermal management, system safety, and product lifespan.   Selecting a high-margin, standards-compliant, and independently certified MagJack is the safest route for robust, long-term PoE deployment. As PoE continues to power Wi-Fi 7 APs, smart surveillance, and industrial IoT devices, higher-rated and thermally optimized RJ45 MagJacks will be the industry’s preferred choice.     Frequently Asked Questions (FAQ)   Q1: How much margin should I have above the IEEE requirement? A: A minimum of 20% margin is recommended to handle elevated temperatures, manufacturing tolerances, and long-term wear.   Q2: Is per-contact rating the same as per-pair rating? A: No. Per-contact current is the limit for a single pin, while per-pair rating refers to the combined capacity of two contacts in one twisted pair. Always verify both.   Q3: What happens if the connector is underrated for the application? A: You may encounter excessive temperature rise, accelerated plating wear, and eventual contact failure—potentially causing device downtime.   Q4: Can I use a PoE+ connector for a PoE++ (802.3bt) application? A: Only if the rated current per pair meets or exceeds 0.6 A (Type 3) or 0.96 A (Type 4). Many PoE+ connectors do not meet these higher demands.   Q5: Do gold plating thickness and contact material make a difference? A: Yes. Thicker gold plating and high-conductivity alloys reduce electrical resistance and slow down wear from repeated mating cycles.

  ◆ Introduction   As Ethernet-based connectivity continues to dominate in industrial control, telecom, automotive, and consumer electronics, the RJ45 connector and its companion component, the LAN transformer (also known as Ethernet magnetics), are crucial to maintaining signal integrity and EMI compliance. While electrical performance is critical, the housing materials of these components also play a vital role in reliability, thermal endurance, manufacturability, and regulatory compliance. This article focuses on the thermoplastics commonly used in RJ45 connectors and LAN transformer housings—explaining why they're chosen, their properties, and how to select the right one for your specific application.     ◆​ Why Thermoplastic Selection Matters   Thermal resistance for high-temperature soldering processes (wave or reflow) Dimensional stability for multi-port and precision-molded connectors Flame retardancy (e.g., UL94 V-0) Mechanical strength under repeated plug/unplug cycles Chemical resistance in industrial and automotive environments Compliance with RoHS, REACH, and UL certifications     ◆​ Thermoplastics Commonly Used in RJ45 Connector Housings   Material Full Name Max Temp (Short-Term) Flame Rating Typical Use PBT + GF Polybutylene Terephthalate, glass-filled ~250–265°C UL94 V-0 Through-hole RJ45, magnetic jacks PA66 + GF Polyamide 66, glass-filled ~240°C UL94 V-0 Basic modular jacks, panel mounts LCP Liquid Crystal Polymer ~260°C+ UL94 V-0 SMT RJ45, multi-port Ethernet PEEK Polyether Ether Ketone ~300°C UL94 V-0 Harsh environment / high-end applications    Key Notes:   PBT is widely used for standard RJ45 due to its excellent balance of cost, strength, and moldability. LCP is preferred for SMT-compatible RJ45 due to its excellent flow, high-temperature resistance, and dimensional precision. PA66 is tough and cost-effective, but more moisture-sensitive. PEEK is reserved for use in military, aerospace, or high-speed industrial Ethernet applications where extreme conditions prevail.     ◆​ Thermoplastics Used in LAN Transformer Housings   Though physically different from RJ45 connectors, LAN magnetics modules (also known as isolation transformers or Ethernet transformers) also rely on high-performance thermoplastics for:   Electrical insulation High dielectric strength Resistance to soldering heat Structural rigidity   Material Application Why It's Used PBT + GF Standard DIP LAN magnetics Excellent moldability, high temp resistance, and insulation properties PA9T / PA66 Compact magnetics High rigidity, dielectric strength LCP SMT LAN transformers Ultra-stable at high reflow temperatures, with minimal moisture absorption   Many LAN magnetics share their housing material design with RJ45 connectors—especially in integrated RJ45+Transformer modules.     ◆​ Custom Material Solutions   At LINK-PP, we understand that specific applications demand custom-tailored housing materials. Whether it's enhanced thermal resistance, improved mechanical durability, or unique environmental compliance needs, we can provide:    Custom thermoplastics for RJ45 and LAN magnetics  UL, REACH, RoHS-compliant formulations  Material matching for reflow, wave solder, or hybrid assembly   Need a custom housing solution? Contact US to discuss your specific material requirements.     ◆​ Conclusion   The right thermoplastic material makes a significant difference in the longevity, performance, and compliance of RJ45 connectors and LAN transformer modules. From cost-effective PBT to high-performance LCP and PEEK, the selection should be guided by:   Thermal process (reflow vs wave) Mechanical demands Environmental exposure Regulatory needs   Choosing wisely means fewer failures, better signal integrity, and easier compliance with modern electronic standards.  

Introduction   For high‑reliability networking installations—switches, embedded boards, industrial routers—the choice between single‑port and multi‑port RJ45 connectors directly impacts design density, BOM simplicity, EMI performance, and PoE capability. LINK‑PP offers both categories with engineered choices for speed, magnetics integration, shielding, and thermal endurance.     1. Single‑Port RJ45 Connectors Use Case & Design Integration   Single‑port (1×1) RJ45 Modjacks/Magjacks suit applications with isolated Ethernet ports—for example, development boards, gateways, and single-channel devices. LINK‑PP’s portfolio covers 10/100Base‑T, 1000Base‑T, and emerging 2.5G–10GBase‑T ratings.   General Features:   8P8C design, tab‑up/down, THT or SMT Optional shielding, LED activity indicators, Auto‑MDIX Industrial operating range up to +85 °C or higher Strong isolation, reliable signal via embedded magnetics ​   2. Multi‑Port RJ45 Connectors   Port Configurations & Density   LINK‑PP’s multi‑port arrays include single‑row (1×2,1×3,1×4, 1×6, 1×8) and stacked dual‑row (2×1, 2×2, 2×4, 2×6, 2×8) options—supporting up to 16 Ethernet ports in a compact footprint.     Design Guidance & Broad Specs   According to LINK‑PP’s design guide: Supports speeds up to 10GBase‑T and HDBase‑T Available PoE options: non‑PoE, PoE, PoE+, PoE++, 2‑pair or 4‑pair Mount types: through‑hole, SMT, pin‑in‑paste, press‑fit Shielding and LED optional per design needs Operating temp grades: 0 °C/+70 °C, −40 °C/+85 °C, −55 °C/+105 °C     3. Comparison Table: Single‑Port vs. Multi‑Port   Aspect Single-Port (1×1) Multi‑Port (1×N, 2×N) Port Count Single per housing Typically 2–8 (1×N), or stacked dual rows (up to 16 ports) PCB Footprint Larger per port High-density integration, fewer components Scale & BOM Cost Lower volume, flexible Cost-effective at scale, fewer placements EMI and Crosstalk Risks Localized, easier isolation Requires careful EMI shielding and layout Magnetics/PoE Support Often integrated (MagJack) in a single unit Shared magnetics across ports in the module LED Indicators Per-port LED customization Ganged LED designs or per-port in modules Thermal Range & Robustness -40 °C to +85 °C, some up to +105 °C Similar grades available; environmental tolerance consistent Typical Applications Embedded toolkits, industrial modules Switches, routers, NAS, telecom, and server motherboards     4. Design & Procurement Considerations   Speed Support: Choose based on required Ethernet class (e.g., 10Base-T, 100Base-TX, 1000Base-T, 2.5GBase-T, 5GBase-T, 10GBase-T). PoE Requirements: Support Non-PoE, PoE, PoE+, PoE++, 2pr PoE, 4pr PoE meet IEEE 802.3af/at standards. Thermal & Environmental Specs: For industrial boards, select parts rated to −40 °C or lower. EMI Management: Shielded modules are recommended when using high-speed links or in noisy environments. Mounting Style & Layout: THT vs SMT vs THR, tab‑down/up, latch styles, board retention posts—optimize for PCB assembly flow and mechanical stability. Compliance and Reliability: All RJ45 Connectors support RoHS, UL, ISO certifications for trusted deployment.     Conclusion   For project leads and procurement engineers planning chip-to-board network integration: Use single‑port RJ45 connectors when individual ports, flexible layout, and high thermal tolerance are priorities. Choose multi‑port RJ45 modules for high-density designs and streamlined assembly—particularly in switches, routers, or multi‑port embedded systems. Evaluate speed, PoE support, shielding, LED configuration, board footprint, and environmental ratings when selecting components. LINK‑PP's product portfolio is well-suited for professional-grade applications with verified datasheets and compliance certifications. If you need tailored model comparisons or BOM-optimized part selection recommendations, we’d be happy to assist further.

Introduction   In high-speed Ethernet system design, RJ45 connectors are critical interfaces subject to both electrical and mechanical stress. The selection of the mounting method — whether Through-Hole Technology (THT), Surface Mount Technology (SMT), or Through-Hole Reflow (THR) — directly influences signal integrity, connector retention, thermal behavior, and process compatibility during PCB assembly. For hardware engineers, a nuanced understanding of these methods is crucial for balancing electrical performance, mechanical reliability, and cost efficiency. This article presents an engineering-driven comparison of RJ45 mounting methods, taking into account considerations such as high-frequency transmission, PCB stress, reflow compatibility, and production automation.     1. Through-Hole Technology (THT)   Definition: THT involves inserting connector pins through drilled vias in the PCB and soldering them on the bottom side, typically via wave soldering.   Mechanical Profile: Axial retention is high due to full pin insertion and fillet formation on the solder side. Solder joints have increased volumetric integrity and are resilient under mechanical strain. Ideal for connectors that require panel-locking, frequent plug cycles, or are subjected to vibration or shock.   Thermal & Assembly Considerations: Requires secondary wave soldering, which adds a separate process step post-reflow. Not ideal for high-density SMT boards due to the need for bottom-side clearance.   Failure Mode Risks: Potential for cold solder joints if preheat parameters are suboptimal during wave soldering. Higher susceptibility to via barrel cracking under thermal cycling due to lead-induced stress.   Use Case Scenarios: Industrial controllers Rack-mount network appliances Defense-grade Ethernet modules     2. Surface Mount Technology (SMT)   Definition:   SMT RJ45 connectors are mounted directly onto the surface pads of the PCB and soldered via reflow, in line with standard SMT components.     Electrical & Mechanical Aspects: Shorter signal paths, reduced parasitic inductance, and better impedance control for high-speed transmission (>1Gbps). Mechanical retention is typically lower, especially in horizontal tab-down variants, unless supplemented by locating pegs, EMI shields, or solder anchor tabs.   Manufacturing Efficiency: Fully compatible with automated pick-and-place and reflow ovens. Enables two-sided assembly, improving board utilization and production throughput.   Challenges: Thermal warping during reflow can result in open or shifted solder joints. Risk of connector float or skew during reflow without accurate mechanical restraint.   Typical Applications: Consumer networking gear (routers, IP cameras) High-density server modules Embedded Ethernet interfaces     3. Through-Hole Reflow (THR)   Definition:   THR is a hybrid method where through-hole components are soldered via reflow instead of wave. It allows single-process assembly with SMT components while retaining the mechanical advantages of THT.   Mechanical & Process Strengths: Provides comparable anchoring strength to THT due to full insertion depth. Solder paste is screen-printed into via barrels and melted during reflow, forming a strong metallurgical bond. Avoids additional wave soldering — ideal for high-mix, mid-volume production.   PCB & Stencil Design Requirements: PCB pads must include plated through holes with a sufficient annular ring. Requires optimized paste volume control to avoid voiding or overflow. The reflow profile must be engineered to accommodate the thermal mass of large-pin connectors.   Failure Modes & Mitigation: Voiding in vertical barrels can occur without proper paste management. Connector design must account for reflow-compatible plastics (typically LCP or PPS >260°C Tg).   Engineering Use Cases: Automotive Ethernet ECUs Industrial automation backplanes Telecom switching modules     Technical Comparison Table   Characteristic THT SMT THR Mechanical Strength High Medium to Low High Signal Path Integrity Medium (longer paths) High (shorter lead inductance) High (optimized hybrid) Soldering Method Wave Soldering Reflow Soldering Reflow Soldering Automation Compatibility Partial Full Full PCB Space Requirement Through-hole & bottom clearance Surface only Through-hole (single-sided) Thermal Cycle Resilience Medium Medium High (when designed properly) Production Efficiency Low to Medium High High (single reflow cycle) Cost Impact (per unit) Higher due to extra step Lower for high volume Medium (THR-specific connectors)       Engineering Considerations for Mounting Method Selection   When selecting a mounting method for RJ45 connectors in advanced Ethernet or PoE designs, engineers should factor in: 1. Mechanical Loading Profile Is the RJ45 subject to frequent cable insertions? Will the product operate in environments with vibration or mechanical shock? → Favor THT or THR with retention pegs. 2. Reflow Temperature Tolerance Can the connector materials withstand >260°C peak temp during Pb-free reflow? → Only SMT or THR-rated RJ45s are suitable. 3. Signal Frequency & EMI Performance Are you designing for 2.5G, 5G or 10GBASE-T? Do you require impedance-controlled routing and minimized stubs? → SMT with internal magnetics shielding may provide better SI. 4. Assembly Line Constraints Is your process wave-solder capable? Are you aiming for one-pass reflow to reduce cost? → THR or SMT is preferred. 5. Board Layer Stackup & Drill Constraints THT/THR requires via tolerance planning, barrel plating, and layer keepouts. SMT enables via-in-pad and shorter return paths.     Conclusion   RJ45 connector mounting strategy is not merely a mechanical choice — it is a multi-variable engineering decision encompassing signal integrity, thermal management, mechanical reliability, and production efficiency.   THT remains irreplaceable for ruggedized applications and mechanically demanding environments. SMT dominates in consumer electronics, compact devices, and cost-sensitive high-speed designs. THR offers the best of both worlds — enabling mechanical strength with full SMT line compatibility.   For engineering teams developing next-generation networking hardware, early collaboration between electrical, mechanical, and DFM (Design for Manufacturing) stakeholders is crucial in selecting the most suitable RJ45 connector and mounting approach. At RJ45-ModularJack.com, we offer a wide range of RJ45 connector solutions—including THT, SMT, and THR-compatible vertical jacks—designed to support diverse layout and performance requirements. If you need assistance selecting the right connector or request mechanical drawings for integration, please contact our technical team. We’re here to help optimize your design.  

  Introduction: What is THR (Through-Hole Reflow)?   Through-Hole Reflow (THR), sometimes called Pin-in-Paste, is a hybrid PCB mounting technology that combines the mechanical strength of traditional Through-Hole Technology (THT) with the automation benefits of Surface-Mount Technology (SMT). It allows components with through-hole leads—like RJ45 connectors—to be mounted using standard SMT reflow soldering processes, eliminating the need for separate wave soldering steps.   This technique is increasingly used in high-reliability applications where signal integrity, mechanical stability, and production efficiency are critical.     How THR Works   In the THR assembly: Components with specially designed through-hole pins are inserted into plated-through holes filled with solder paste. During reflow soldering, the paste melts and solidifies, anchoring the leads firmly into the PCB. No wave soldering is required, enabling full SMT-compatible production lines. This approach bridges the gap between high mechanical stress requirements and efficient automated production.     Key Advantages of THR in RJ45 Connectors   1. Enhanced Mechanical Strength RJ45 connectors often endure cable insertion/extraction forces. THR provides superior anchoring compared to SMT-only solutions. 2. SMT Line Compatibility THR parts can go through reflow soldering, allowing RJ45 connectors and SMT components to be assembled in a single pass. 3. Improved Reliability in Harsh Environments Ideal for industrial, telecom, or automotive Ethernet applications where vibration or shock may dislodge weaker joints. 4. Reduced Process Complexity By removing the wave soldering stage, THR simplifies the manufacturing process, especially for mixed-technology boards.       Design Guidelines for THR-Compatible RJ45 Connectors   To maximize THR benefits, engineers should consider: Solder Paste Volume Control: Ensure the correct solder volume is deposited into the PTH (Plated Through Holes). Thermal Profile Optimization: Adjust reflow profiles to ensure complete solder joint formation without voids. Pin Design: Use connectors with long, narrow, solderable leads designed to retain solder paste (e.g., eye-of-the-needle pins). PCB Pad Layout: Maintain proper annular ring dimensions and paste mask openings following IPC standards.     LINK-PP THR RJ45 Example: LPJG0926HENLS4R   One exemplary THR solution is the LPJG0926HENLS4R by LINK-PP. This integrated RJ45 connector is specifically designed for Through-Hole Reflow processes and offers: Integrated magnetics for 10/100/1000Base-T Ethernet Robust plastic housing with reinforced THR leads Minimum 350μH OCL at 8mA, ensuring signal integrity RoHS-compliant and halogen-free Fully compatible with SMT reflow ovens LPJG0926HENLS4R.pdf   This product is ideal for high-volume, mechanically demanding Ethernet applications, such as managed switches, routers, PoE devices, and embedded network modules.   THR vs SMT vs THT: Quick Comparison   Feature THT SMT THR Mechanical Strength ★★★★☆ ★☆☆☆☆ ★★★★☆ Assembly Method Wave solder Reflow solder Reflow solder Automation Limited Fully automated Fully automated Ideal for Ruggedized designs Compact PCBs Ruggedized SMT lines Example LPJ0188CNL LPJ19325AHNL LPJG0926HENLS4R     Applications Suited for THR-Mounted RJ45 Connectors   Industrial Ethernet Controllers Automotive Infotainment Systems Smart Grid & Energy Metering Medical Device Networks 5G Baseband and Radio Units     Final Thoughts   As PCB designs become denser while performance and durability demands rise, THR technology stands out as a modern, reliable, and efficient solution. For engineers designing with Ethernet connectivity in mind, using THR-compatible RJ45 connectors like LINK-PP’s LPJG0926HENLS4R offers a way to meet both mechanical and manufacturing goals without compromise.   To explore LINK-PP’s full range of RJ45 solutions, including THT, SMT, and THR options, visit www.rj45-modularjack.com.

Why RJ45 Connectors Have LEDs   RJ45 connectors with integrated LEDs are common in Ethernet ports across routers, switches, industrial controllers, and embedded systems. These LEDs, driven by the Ethernet PHY, provide quick visual feedback for: Link Status – Indicates a valid physical connection has been established. Data Activity – Blinks when packets are being transmitted or received. Connection Speed – Some PHYs assign colors to reflect 10/100/1000 Mbps link speed. ⚠ Note: Behavior is highly dependent on PHY configuration and may vary by design. Always consult the PHY datasheet for specific LED control logic.     Typical LED Behavior Reference   LED State Common Interpretation Solid Green Link at 100 Mbps (typical) Blinking Yellow Data activity present Solid Orange Often used to denote 1 Gbps Off No link or power issue     Custom LED Configurations with LINK-PP   LINK-PP supports full LED customization, including: Color combinations (e.g., Green/Yellow, Orange/Green, or bi-color LEDs) Positioning (left, right) Brightness level, logic polarity, and LED drive compatibility with PHY LED-free variants for ultra-compact or shielded applications Example: Industrial-grade connectors may use Orange/Green to clearly distinguish 100 Mbps and 1 Gbps links in high-noise environments. Custom codes like E-G/Y, W-G/G, Bi-color, or N/N (no LED) are embedded in the part number suffix for quick identification. (e.g., LPJG0933HENL = Green/Yellow LED combo)     Engineering Considerations   For optimal hardware integration, ensure: LED current ratings match PHY driver capabilities (typically 2–16 mA sink) Color selection aligns with user expectations and product UI Orientation of light pipes matches faceplate cutouts EMI concerns are addressed, especially for high-speed (1G/2.5G) Ethernet lines Environmental specs meet rugged/industrial standards if applicable     Why Use LED-Integrated RJ45s   Benefit Description Quick Troubleshooting LED indicators simplify link and activity diagnostics Reduced BOM No need for external LEDs and routing Better Aesthetics Clean integration with product design Customization Match your application’s logic and visual needs     Conclusion   Integrated LEDs are more than cosmetic—they are essential for visibility, diagnostics, and efficient deployment. With LINK-PP’s flexible customization, you can define the LED behavior, color, and positioning to match your system’s requirements precisely.   ☛ [Contact US for Custom RJ45 Design] ☛ [Explore LED RJ45 Products Catalog]

Introduction: A Crucial Choice in Ethernet Design RJ45 connectors are fundamental components in Ethernet systems, but engineers often face a design-level decision: Should you use an Integrated RJ45 (MagJack) or a Modular RJ45 (without discrete magnetics)?   This article, tailored for engineers, product designers, and EMS professionals, dives deep into the trade-offs between these two connector architectures—helping you make an informed decision for performance, cost, and manufacturability.     What Is an Integrated RJ45 (MagJack)?   An Integrated RJ45 combines: Standard RJ45 interface Built-in magnetics (isolation transformers, common-mode chokes) Optional LEDs   Advantages: Simplified layout — fewer external parts on the PCB Smaller footprint — ideal for compact designs Faster assembly — reduces BOM count Pre-qualified EMI performance   Drawbacks:  Limited tuning flexibility  Harder to service — the entire module needs replacing  Higher cost in low-volume production     What Is a Modular RJ45 (Empty Jack)? A Modular RJ45 provides just the jack. The magnetics are mounted separately as discrete components.   Advantages:  High customization — fine-tune magnetic specs  Easier maintenance — replace parts independently  Cost-effective for volume production   Drawbacks:  Larger PCB area required  More complex routing  Requires signal integrity expertise     Feature Comparison Table Integrated vs. Modular RJ45 Connectors Feature Integrated RJ45 Modular RJ45 Magnetics Built-in External PCB Complexity Low High Layout Flexibility Limited High EMI/SI Tuning Pre-set Customizable Assembly Simplified More steps Servicing Replace full module Replace part Cost (Low Volume) Higher Lower Cost (High Volume) Competitive Potentially cheaper     Design Application Guide   Choose Integrated RJ45 when: You need rapid prototyping or fast time-to-market Space is constrained (e.g., IoT boards, routers) You prefer plug-and-play EMI compliance   Choose Modular RJ45 when: EMI tuning is critical (e.g., medical, industrial) You build for high-volume production Your team has signal integrity design capabilities   Conclusion: Balance Flexibility with Simplicity The choice between integrated and modular RJ45 designs isn't just about price—it's about control, complexity, and context. At RJ45-ModularJack.com, we help OEMs and engineers select the best-fit solution from a full range of MagJack and discrete RJ45 options. Whether you're building a compact IoT device or a carrier-grade switch, we support your Ethernet interface design from concept to production.  

In today's rapidly evolving technological landscape, reliable and high-speed connectivity is paramount. From industrial automation to smart home devices, the demand for robust networking components continues to grow. Among these, the RJ45 connector stands as a ubiquitous interface for Ethernet connections. This blog post will explore the LPJG0926HENL, a cutting-edge RJ45 connector designed to meet the stringent requirements of modern networking applications, particularly those involving Power over Ethernet Plus (PoE+).     What is the LPJG0926HENL?   The LPJG0926HENL is a single-port, 100/1000 Base-T RJ45 connector with integrated magnetics, specifically engineered for PoE+ applications. Manufactured by LINK-PP, this component is a testament to advanced design and manufacturing, ensuring stable and efficient data transmission, as well as power delivery. Its robust construction and adherence to international standards make it an ideal choice for a wide array of demanding environments.     Key Features and Technical Specifications Datasheet: LPJG0926HENL.pdf   The LPJG0926HENL boasts a comprehensive set of features that contribute to its superior performance and versatility. Here’s a closer look at its technical prowess:   High-Speed Data Transmission: Supporting 100/1000 Base-T speeds, the LPJG0926HENL facilitates Gigabit Ethernet connectivity, crucial for applications requiring high bandwidth and fast data transfer rates. PoE+ Compatibility: This connector is designed with integrated magnetics, ensuring full compliance with IEEE 802.3at standards and enabling efficient power delivery over Ethernet cables. This feature simplifies cabling infrastructure by allowing both data and power to be transmitted through a single cable, reducing installation costs and complexity. Robust Compliance: The LPJG0926HENL meets a multitude of international standards, including UL, Reach, RoHS, ISO19001, and ISO14001. These certifications underscore its reliability, environmental friendliness, and adherence to quality management systems. Integrated Magnetics: The built-in magnetics provide essential signal isolation and filtering, protecting connected devices from electrical noise and ensuring signal integrity. This integration also reduces the need for external components, leading to a more compact and cost-effective solution. Single Port Design: With a 1x1 port configuration, it is optimized for single-device connections, making it suitable for applications where space is a premium or individual device connectivity is preferred. Advanced Circuitry: Features like Bst Circuit (Boost Circuit) and AutomDX (Automatic Medium-Dependent Interface Crossover) further enhance its performance and ease of integration. The contact mating area is plated with GOLD (6u"/15u"/30u"), ensuring excellent conductivity and corrosion resistance.   Specifications:   Specification Details Part Number LPJG0926HENL Speed 10/100/1000 Mbps PoE Rating IEEE 802.3at, 1.5A per contact LEDs Yes (Green/Yellow) Mounting Style Through-hole Operating Temperature -40°C to +85°C Shielding Full Metal Shield with EMI Tabs Housing Material High-temperature thermoplastic UL94V-0 Compliance RoHS, REACH, UL certified       Applications of the LPJG0926HENL   The versatility and robust features of the LPJG0926HENL make it an excellent choice for a diverse range of applications. Some notable examples include: ◆Raspberry Pi 3B+ Projects: Ideal for hobbyists and developers working on embedded systems, providing reliable Ethernet and PoE+ capabilities. ◆ Digital Cameras: Enhances connectivity for IP cameras and other digital imaging devices, especially in surveillance and security systems where both power and data are needed. ◆ Industrial PCs: Ensures stable network connections in industrial environments, where ruggedness and consistent performance are critical. ◆ Embedded Main Boards: A perfect fit for various embedded systems, offering a compact and efficient networking solution.     Why Choose the LPJG0926HENL?   Choosing the right RJ45 connector is crucial for the performance and longevity of any network-dependent device. The LPJG0926HENL stands out due to its combination of high-speed capabilities, PoE+ support, and adherence to rigorous quality standards. Its integrated design simplifies board layout and reduces component count, leading to more compact and reliable end products. For engineers and product designers seeking a dependable and efficient Ethernet connector for their next-generation devices, the LPJG0926HENL offers a compelling solution.     Conclusion   The LPJG0926HENL is more than just an RJ45 connector; it's a critical component that enables high-performance, power-efficient, and reliable Ethernet connectivity in a wide range of applications. Its advanced features and compliance with industry standards make it a top-tier choice for anyone looking to build robust and future-proof networking solutions. As technology continues to advance, components like the LPJG0926HENL will play an increasingly vital role in connecting our world.

Understanding product part numbers is critical when selecting the right RJ45 female connector for your Ethernet-based application. As a global supplier of integrated magnetic RJ45 connectors, LINK-PP provides an organized and logical naming convention that encapsulates each product's most important features. This article explains how to decode LINK-PP’s RJ45 connector naming system, helping engineers, buyers, and developers identify the right solution efficiently. Whether you're sourcing networking switches, industrial control panels, or embedded boards, this guide will clarify how to choose the correct connector based on model codes.     Why Naming Rules Matter in RJ45 Connector Selection The demand for compact and feature-rich RJ45 connectors with integrated magnetics is rapidly growing in networking, telecommunications, and IoT industries. However, the abundance of part numbers on the market often creates confusion during the sourcing process. By understanding LINK-PP’s naming system, you can: Save time on part identification Avoid compatibility issues Streamline communication with procurement and design teams Ensure your product meets performance and compliance standards   The Structure of LINK-PP RJ45 Connector Part Numbers Let’s take an example part number from LINK-PP:   LPJG0926HENL PoE+ Gigabit Magjack   Each segment of this model encodes key specifications: Segment Meaning LP LINK-PP manufacturer prefix J Connector Type (J = Jack) G Type Code (G = Gigabit) 0926 Custom internal code defining port type, height, layout, etc. HE LED configuration and EMI shield status NL RoHS compliance indicator (NL = Lead-Free, RoHS-compliant)   Understanding each part of the code allows sourcing teams and hardware engineers to decode product compatibility.     Common Prefixes and What They Mean Here are some commonly used codes in LINK-PP RJ45 connector naming conventions:   Code Description LPJ/ 10/100Base-T Ethernet Series LPJU RJ45 Combo Connector with USB LPJG Gigabit-speed Magnetic Jack LPJE Standard RJ45 ModularJack LPJD Vertical Type RJ45 Connector LPJK Length = 1.3 inch series   Code Configuration A With LED and EMI-Finger B With LED and Non EMI-Finger C Without LED but with EMI-Finger D Without LED and EMI-Finger E With LED and EMI-Finger (L=4.9mm) F With LED and No EMI-Finger (L=4.9mm) G With LED and EMI-Finger (L=4.06mm) H With LED and No EMI-Finger (L=4.06mm)   Each naming variation reflects different port counts, shielding types, mounting orientation, and application compatibility, such as vertical RJ45 connectors, PoE support, or auto-MDIX compatibility.     How to Use Naming Rules for Better Product Selection When sourcing RJ45 magnetic connectors, look beyond just the datasheet. The part number itself often gives away: Whether the connector has LED indicators The mounting orientation (right-angle or vertical) Port configuration (1x1, 1x2 stacked, etc.) Whether it’s suitable for 10/100 Mbps or 1000 Mbps Ethernet RoHS/environmental compliance By referencing LINK-PP’s naming logic, engineers can quickly narrow down parts suitable for: Networking equipment (routers, hubs, switches) Embedded systems with LAN-on-Motherboard (LOM) Industrial Ethernet and M2M communication Consumer devices requiring compact RJ45 jacks   Explore LINK-PP RJ45 Connector Series At LINK-PP, we offer a comprehensive range of RJ45 connectors with integrated magnetics, supporting 10/100/1000Base-T, PoE, stacked multi-port layouts, and more. All products are compliant with IEEE 802.3, RoHS, and support a range of transceivers.  Browse the full catalog here: LINK-PP RJ45 Connector Store     Conclusion Understanding the LINK-PP RJ45 connector naming rules helps you make smarter, faster, and more confident hardware decisions. By learning how to decode part numbers like LPJG0926HENL, you can determine speed, LED configuration, compliance status, and mechanical layout in seconds. Whether you're building a next-generation switch, industrial automation gateway, or smart connected device, LINK-PP’s RJ45 connector naming logic ensures clarity in selection and confidence in performance. Need help finding a matching model? Contact our support team, or use our model decoding guide for instant part number insights.