JXF0-5012NL THR 5GBASE-T ICM 90W PoE++ Integrated RJ45 Connector

What is the JXF0-5012NL connector and what are its core specifications?

The JXF0-5012NL is a rugged, industrial integrated RJ45 connector (ICM/MagJack). It is specified for 5GBase-T (5 Gbps) high-speed Ethernet and delivers 90W 4-Pair PoE++ power (900 mA @ 57VDC, IEEE 802.3bt compliant). Key specs include an industrial operating temperature of -40°C to +85°C, 2250 VDC galvanic isolation (transformer side), dual Green/Yellow bi-colour LEDs, and a Pin-in-Paste / Through-Hole Reflow (THR) compatible footprint with Top & Sides EMI spring fingers.

5GBase-T Integrated RJ45 Connector with 90W 4-Pair PoE++ Overview

The JXF0-5012NL is an industrial-grade, single-port Gigabit PulseJac Integrated Connector Module (ICM) engineered specifically for bandwidth-demanding, high-power embedded applications. Fully supporting 5GBase-T Ethernet speeds under IEEE 802.3 specifications, this connector incorporates internal magnetics, 3-wire PHY-side common mode chokes, and direct high-power termination capable of delivering up to 90W (900mA continuous @ 57VDC over 4 pairs) for IEEE 802.3bt Type 4 PoE++ devices.

Designed for robust deployment in extreme environments, the JXF0-5012NL operates across a -40°C to +85°C temperature range. Its specialized housing and pin construction enable Through-Hole Reflow (THR / Pin-in-Paste) processing, reducing PCB assembly costs by eliminating manual secondary soldering operations while achieving an MSL 1 shelf life and high mechanical retention.

Key Architectural Highlights

• High-Speed Signal Integrity: Optimized for 5Gbps operation with return loss surpassing -24dB (1–40MHz) and cross-talk suppression down to -30dB (10–125MHz).
• High-Power PoE++ Integration: Dedicated DC pins (Pins 15–18) safely route 900mA per pair into the cable side without degrading high-frequency signal pairs or saturating magnetic cores.
• Superior EMI Suppression: Engineered with internal 3-wire chokes on the PHY side and external multi-contact EMI spring fingers (Top & Sides) to guarantee low radiation emissions and FCC compliance.
• Manufacturing Resilience: J-STD-075 R7 category compliance (up to 260°C peak reflow/wave soldering) with 30 µ" gold-plated contact interfaces for mission-critical reliability.

Technical Specification Tables of JXF0-5012NL THR RJ45 Magjack

1. Absolute & Environmental Ratings

2. High-Frequency Electrical Characteristics (@ 25°C, -40°C to +85°C)

3. PoE++ Delivery Specifications

4. Material & Electroplating Specifications

JXF0-5012NL Integrated RJ45 Connector Datasheet

Engineering Information

Pinout & Schematic Configuration (Drawing: JXF0-xx12NL)

The JXF0-5012NL integrates 18 functional pins plus 2 mechanical ground retention posts:

PCB Hole Layout (Component Side View):
   [12] [11] (Left LED)                       [14] [13] (Right LED)
       [10] [8]  [6]  [4]  [2]   <- Signal Rows
         [9]  [7]  [5]  [3]  [1]
             [18]  [16]          <- Dedicated 90W PoE Pins
               [17]  [15]
 (Shield Tab)                                         (Shield Tab)

Pins 1–10 (Signal & Center Taps):

• Pin 1: MD1+ | Pin 2: MD1- | Pin 3: MD2+ | Pin 4: MD2-
• Pin 5: MDCT2 | Pin 6: MDCT3
• Pin 7: MD3+ | Pin 8: MD3- | Pin 9: MD4+ | Pin 10: MD4-

Pins 11–14 (Bi-Colour LEDs):

• Pins 11 & 12: Bi-directional control for Left LED (Green @ 568nm / Yellow @ 585nm)
• Pins 13 & 14: Bi-directional control for Right LED (Green @ 568nm / Yellow @ 585nm)

Pins 15–18 (PoE Power Injection Inputs):

• Pin 15: VDC1+ | Pin 16: VDC1-
• Pin 17: VDC2+ | Pin 18: VDC2-
• Circuit Note: Internal termination network incorporates 4× 22nF caps, 4× 75Ω resistors, and a 1nF 2kV isolation decoupling cap to chassis ground.

Layout, Panel Cutout & Solder Process Recommendations

• Panel Cutout: Standard clearance requirement is 17.82 mm width × 14.01 mm height.
• Body Footprint: Width 16.80 mm × Depth 25.53 mm × Height 13.50 mm (standoff height ~0.30 mm).
• Hole Diameters on PCB:
  • 14× Through Holes for Signal/PoE: Ø0.89 mm finished hole.
  • 4× LED Pin Holes: Ø1.02 mm finished hole.
  • 2× Shield Snap-in Retention Holes: Ø3.25 mm plated/non-plated holes.
• Pin-in-Paste (THR) Process Guidelines:
  • Pin tail length is 3.20 mm, engineered for PCB thicknesses ranging from 1.6 mm to 2.4 mm to allow sufficient paste volume pull-in.
  • Solder paste stencil apertures should use overprinting (10–15% enlargement) around the 0.89 mm and 1.02 mm holes to avoid solder starvation/voids.
  • Conforms to IPC/JEDEC J-STD-075 (R7 classification): Max peak reflow body temperature of 260°C.

90W 4-Pair PoE Capability

Does JXF0-5012NL support PoE?

Yes. JXF0-5012NL is a 4-pair PoE version rated for 900 mA and 90 W. The manufacturer lists this configuration as 900mA - 90W 4 Pair.

The 90 W rating is an important distinction from standard non-PoE and lower-power PoE RJ45 interfaces.

PoE Design Note

The JXF0-5012NL is a PoE-capable RJ45 integrated connector, not a complete PoE power-conversion module.

A complete PoE design still requires the appropriate:

• PSE or PD controller
• Power conversion stage
• Protection circuitry
• Detection/classification circuitry where applicable
• Thermal design
• System-level compliance testing

The connector's 90 W capability therefore should not be interpreted as meaning that every system using this component can automatically deliver 90 W to a powered device.

FAQ

Q1: Does JXF0-5012NL support standard 1000Base-T and 2.5GBase-T legacy modes?

A: Yes. The internal magnetics and transformer ratios (1:1) meet IEEE 802.3 specifications across 1Gbps, 2.5Gbps, and 5Gbps. It will auto-negotiate and operate seamlessly at lower data rates.

Q2: What does "Isolation is across the Transformer only" mean for JXF0-5012NL?

A: In pure non-PoE connectors (e.g., JXF0-5010NL), 2250VDC isolation exists entirely between the cable-side RJ45 pins and all PCB-side pins. In JXF0-5012NL, dedicated high-power lines connect directly to center taps for PoE injection (Pins 15–18); hence, high-voltage galvanic breakdown protection is strictly maintained across the transformer signal coils, not through the PoE injection DC paths.

Q3: Why does JXF0-5012NL use a 3-wire (3W) choke on the PHY side?

A: Carrying 900mA per pair introduces heavy common-mode DC flux. Placing a 3-wire common mode choke on the PHY side ensures common-mode noise suppression without running heavy DC PoE currents directly through the choke windings, avoiding core saturation and signal degradation.

Q4: What are the forward voltage and current limits for the integrated bi-colour LEDs?

A: The green LED peaks at 568nm and yellow at 585nm. Maximum continuous DC forward current is 150mA, maximum power dissipation is 100mW, and max reverse breakdown voltage (VrVr​) is 5.0V. Typical luminous brightness is 8–12 mcd at 20mA.

Q5: Can this connector undergo standard wave soldering instead of reflow?

A: Yes. Per J-STD-075 rating R7 and J-STD-002, the component supports standard wave soldering with preheat temperatures up to 260°C without plastic warping or contact degradation.