LPJ27003-9A4NL 10/100 Base-T Tab Up Green&Yellow/Green&Yellow LED 2X2 Port RJ45 Connector

Product Specifications

Key Benefits of LINK-PP LPJ27003-9A4NL 2x2 Stacked RJ45 Connector

• 2x2 4-Port Stacked Consolidation Doubles Front-Panel Port Density: Stacks two rows of two RJ45 ports into a compact 31.24mm wide package, streamlining automated Pick & Place insertion and reducing PCB trace routing complexity.
• IEEE 802.3u 10/100BASE-TX Fast Ethernet Speed: Embeds a 4-core transformer and common-mode choke matrix per port that isolates and filters transmit/receive lines, ensuring clean Fast Ethernet eye diagrams with minimal differential insertion loss.
• Integrated Green&Yellow Bi-Color Status LEDs: Built-in LED indicators per port provide clear visual diagnostics for network link establishment, port speed, and data activity status.
• EMI Shield Tabs for Enhanced Panel Grounding: Outfitted with external EMI spring tabs on the metal shield frame that press tightly against chassis front panel cutouts, forming a low-impedance grounding loop to suppress radiated emissions.
• Integrated Bob Smith Termination (BST) & Auto-MDIX per Port: Built-in 75-ohm BST circuits route common-mode EMI noise and ESD transients safely to ground, while Auto-MDIX logic supports automatic straight-through or crossover cable detection.
• Customizable Gold Contact Plating: Available in Gold 6u", 15u", or 30u" plating thickness options to ensure low contact resistance and corrosion protection across 750+ mating cycles per port.

Integrated Magnetics & 2x2 Stacked Signal Architecture

The LINK-PP LPJ27003-9A4NL utilizes an advanced 2x2 Stacked Integrated Connector Module (ICM) architecture that embeds 10/100 Base-T magnetics directly behind each RJ45 port pin array, eliminating high-frequency noise radiation caused by long trace runs on the motherboard.

4-Core Per-Port Fast Ethernet Transformer Configuration

Featuring a 1CT:1CT transmit and receive turns ratio with 4 magnetic cores per channel, the LPJ27003-9A4NL establishes 1500Vrms galvanic isolation between the Ethernet PHY transceiver chip and the external network cable. The 4-core layout provides precise impedance matching across transmit and receive differential pairs, suppressing inter-channel crosstalk and inter-port channel interference.

Bob Smith Termination (BST) & ESD Rejection

The integrated Bob Smith Termination (BST) networks utilize high-voltage capacitors and precision resistors to balance line impedance on unused cable pairs. This prevents common-mode noise reflection, reduces radiated EMI emissions, and enhances system ESD immunity during cable plugging.

PCB Mounting & Mechanical Specifications

Designed for automated Through-Hole Technology (THT) assembly, the LPJ27003-9A4NL incorporates robust mechanical features to ensure structural integrity on FR4 substrates.

2x2 Package Geometry & EMI Shield Tabs

With package dimensions of 25.79mm H x 28.40mm L x 31.24mm W, the LPJ27003-9A4NL provides a compact 4-port stacked footprint. Integrated Green&Yellow LEDs provide clear visual link status and data activity diagnostics per channel, while T-Post mechanical pegs anchor the housing firmly to the motherboard during cable plugging.

Target Applications: Enterprise Switches, Hubs, and Network Routers

Combining IEEE 802.3u Fast Ethernet speed, 2x2 stacked port density, BST noise suppression, and EMI shield tabs, the LINK-PP LPJ27003-9A4NL supports diverse embedded systems:

• Enterprise & Industrial Network Switches & Hubs: Ideal for 8-port/16-port managed Ethernet switches, unmanaged hubs, and network patch panels.
• Multi-LAN Broadband Routers & Security Gateways: Deployed in commercial multi-port routers, SD-WAN edge gateways, and industrial security firewalls.
• Building Automation Controllers & Access Panels: Suitable for commercial access control panels, smart building controllers, and fieldbus automation gateways.

How to Select and Verify LINK-PP LPJ27003-9A4NL RJ45 Magjack

Hardware design engineers and procurement specialists evaluating the LINK-PP LPJ27003-9A4NL for new designs or second-source qualification should verify the following core parameters:

• 2x2 Stacked Footprint Alignment: Confirm that the 2x2 stacked 8p8c through-hole pin arrangement, 31.24mm package width, and T-Post peg locations match your motherboard Gerber layout.
• 4-Core Per-Port Magnetics Compatibility: Confirm that a 4-core magnetic matrix per port and a 1CT:1CT turns ratio match your Fast Ethernet PHY transceiver reference design.
• LED Option & Driving Polarity: Confirm that the Green&Yellow bi-color LED configuration and pin polarity match your host SMT LED driving circuit per channel.
• Package Height & EMI Tab Clearance: Ensure that the 25.79mm package height and external EMI spring tabs fit within your front-panel bezel cutout.