KRJ-CB4.2YGZNL Shielded RJ45 Modular Jack (Tab-Up, DIP, with LED)

The KRJ-CB4.2YGZNL is a highly reliable, single-port (1x1) RJ45 Modular Jack. Designed for standard Local Area Network (LAN) and data communication interfaces, this connector features a Tab-Up latch orientation and a traditional DIP (Through-Hole) mounting style.

Crucially, this is a non-magnetic RJ45 connector (without internal transformers), making it the perfect choice for hardware architectures where the Ethernet magnetics are already integrated into the PHY chip or placed discretely on the PCB. Enclosed in a robust EMI metal shield and equipped with integrated Yellow and Green LEDs, the KRJ-CB4.2YGZNL offers PCB designers a cost-effective, space-saving, and highly customizable physical interface for networking hardware.

Key Features of  KRJ-CB4.2YGZNL RJ45 Modular Jack 

1. Highly Customizable Durability (Gold Plating)

Unlike standard off-the-shelf connectors, the KRJ-CB4.2YGZNL offers highly flexible contact mating area plating options. Buyers can specify gold thickness ranging from Gold Flash (G/F) for cost-sensitive consumer devices, all the way up to 50µ" Gold for high-vibration, high-mating-cycle industrial environments.

2. Excellent EMI Shielding

The connector is fully encased in a metal shield with grounding EMI tabs. This Faraday cage design effectively absorbs and grounds Electromagnetic Interference (EMI), ensuring clean signal integrity and helping your end-product pass stringent FCC/CE EMC certifications.

3. Rigorous Quality Assurance

DGKYD ensures maximum reliability by subjecting the KRJ-CB4.2YGZNL to a 200% electrical performance test (including rigorous open/short circuit testing) before dispatch. It fully complies with IEEE 802.3 mechanical standards and is completely RoHS and REACH compliant.

4. Flexible Thermal Ratings

Available in both standard commercial temperature (0°C ~ 85°C) and industrial wide-temperature (-40°C ~ 85°C) variants, this RJ45 jack can be deployed in everything from office routers to outdoor IoT gateways.

Technical Specifications

1. General & Mechanical Parameters

2. Material & Electrical Characteristics

3. Environmental & Soldering Guidelines

KRJ-CB4.2YGZNL RJ45 Datasheet 

Target Applications

Because it lacks internal magnetics, the KRJ-CB4.2YGZNL is highly versatile and typically paired with external isolation transformers or modern PHYs with built-in magnetics. Ideal applications include:

• Networking Devices: Consumer routers, unmanaged switches, and Ethernet hubs.
• Industrial IoT: Serial-to-Ethernet converters, PLC control panels, and smart meters.
• Consumer Electronics: Smart TV motherboards, set-top boxes (STB), and PC motherboards.
• Security Systems: NVR/DVR hubs and IP camera base stations.

Engineering Design-in Guidelines

For PCB designers integrating the KRJ-CB4.2YGZNL:

1. Magnetics Requirement: Ensure your schematic includes discrete Ethernet isolation transformers (magnetics) between the PHY chip and this connector, as it does not contain internal coils.
2. Panel Cutout (Tab-Up): Design the device enclosure to accommodate a Tab-Up latching mechanism (the cable's plastic clip will face upwards).
3. EMI Grounding: Route the shield's EMI tabs directly to the chassis ground (Earth) using thick, low-impedance copper traces to maximize shielding effectiveness.
4. LED Resistors: The integrated Yellow and Green LEDs require appropriate external current-limiting resistors on the PCB, tailored to your system's driving voltage.

Frequently Asked Questions

Q: Does the KRJ-CB4.2YGZNL have internal magnetics?

A: No, this is a non-magnetic RJ45 connector. You will need to use discrete magnetic transformers on your PCB to achieve electrical isolation.

Q: What does "DIP" mounting mean for an RJ45 connector?

A: DIP (Dual In-line Package) in this context refers to Through-Hole Technology (THT). The connector's pins are designed to be inserted into holes drilled through the PCB and wave-soldered on the opposite side.

Q: Is this connector suitable for industrial environments?

A: Yes, it can be ordered with an industrial operating temperature range of -40°C to +85°C and thicker gold plating (up to 50µ") for harsh environments.

Q: What are the integrated LED colors?

A: The connector features integrated Yellow and Green LEDs, which are standard for indicating network link status and data activity.

Q: Can this connector be processed using reflow soldering?

A: The standard version is optimized for wave-soldering. However, a reflow-soldering compatible high-temperature plastic version is available as an option upon request.