LPJG4820G4NL 1000BASE-T Industrial RJ45 Connector with Dual Bi-Color LEDs

LPJG4820G4NL​ Gigabit Integrated Connector Module Overview

The LINK-PP LPJG4820G4NL is an ultra-compact single-port (1×1) Gigabit Integrated Connector Module (ICM) engineered for harsh industrial networking environments. Featuring an industry-leading short body depth of only 21.25 mm, this connector saves over 30% (~11 mm) of longitudinal PCB depth compared to standard 32.5 mm MagJacks.

Qualified across an extended industrial operating temperature range of -40°C to +85°C, it integrates dual bi-color (Green/Yellow + Green/Yellow) status LEDs, 1CT:1CT magnetic isolation transformers, and a rugged SUS 304-1/2H stainless steel shield with EMI spring fingers. Fully certified under UL File Number E484635, it provides an exact drop-in alternative to industry-standard compact Gigabit connectors.

Mechanical Dimensions, PCB Footprint & Panel Guidelines

1. Overall Outer Dimensions:

- Length / Depth into PCB: 21.25 mm (Ultra-compact short body)
- Front Mating Face Width: 15.94 mm
- Height above PCB: 13.30 mm
- Solder Pin Tail Length: 3.60 mm ~ 3.70 mm (4.0 mm max)

2. Recommended PCB Hole Layout (Top View):

- Total Drilled Holes: 18 holes
- Signal Leads (Pins 1–10): 10 holes of Ø0.90 mm [10 x Ø0.90 mm]
- Dual Bi-Color LED Leads (Pins 11–14): 4 holes of Ø1.02 mm [4 x Ø1.02 mm]
- Shield Ground Posts: 2 holes of Ø1.70 mm and 2 holes of Ø3.25 mm

3. Panel Cutout Dimensions:

- Opening Width: 16.50 mm ~ 17.00 mm
- Opening Height: 13.50 mm ~ 14.00 mm
- Shell Feature: Built with SUS 304 stainless steel equipped with top and side EMI spring fingers to ensure continuous metallic contact with the chassis enclosure.

4. Wave Soldering Parameters:

- Recommended Peak Tip Temperature: 250°C Max
- Solder Contact Dwell Time: 5 Seconds Max

Comprehensive Specifications of RJ45 Connector with Integrated Magnetics

Internal 10-Pin PHY Magnetics & Dual Bi-Color LED Schematic

[ PHY CHIP SIDE ]                    [ CABLE / RJ45 SIDE ]
                 CT (Pin P1) ──┐
    Channel 0: TD0+ (Pin P2) ──┼──┐ 1CT : 1CT ┌───[CMC]─── J1 (TX0+)
               TD0- (Pin P3) ──┘  │           └───[CMC]─── J2 (TX0-)
    Channel 1: TD1+ (Pin P4) ──┐  │ 1CT : 1CT ┌───[CMC]─── J3 (TX1+)
               TD1- (Pin P5) ──┘  │           └───[CMC]─── J6 (TX1-)
    Channel 2: TD2+ (Pin P6) ──┐  │ 1CT : 1CT ┌───[CMC]─── J4 (TX2+)
               TD2- (Pin P7) ──┘  │           └───[CMC]─── J5 (TX2-)
    Channel 3: TD3+ (Pin P8) ──┐  │ 1CT : 1CT ┌───[CMC]─── J7 (TX3+)
               TD3- (Pin P9) ──┘  │           └───[CMC]─── J8 (TX3-)
                GND (Pin P10) ────┴───[1000pF/2KV]──► Shield Ground
                                  ▼
               [ Bob Smith Termination: 4x 75Ω Resistors + 1000pF/2kV to Shield ]
  ══════════════════════════════════════════════════════════════════════════════
               [ DUAL BI-COLOR LED SCHEMATIC (INDEPENDENT CHANNELS) ]
    Left LED:  Pin 11 ──►|── Pin 12 (Green)  /  Pin 12 ──►|── Pin 11 (Yellow)
    Right LED: Pin 13 ──►|── Pin 14 (Green)  /  Pin 14 ──►|── Pin 13 (Yellow)

Engineering Layout Highlights:

1. Ultra-Compact 21.25 mm Footprint:
Unlike conventional Gigabit MagJacks measuring 32.5 mm in depth, the LPJG4820G4NL requires only 21.25 mm of longitudinal depth, freeing over 11 mm of board space directly behind the connector for PHY placement and power rail decoupling.

2. Consolidated Single Center-Tap Architecture (Pin P1):
Pins P2 through P9 handle the four differential pairs (TD0± through TD3±), while Pin P1 provides a shared center-tap connection, simplifying track routing on 2-layer and 4-layer PCBs.

3. True -40°C to +85°C Industrial Ferrite Core:
High-permeability industrial ferrite cores guarantee ≥350 μH
inductance with 8 mA DC bias across extreme temperature transitions, preventing packet loss in unheated outdoor cabinets.

Optical LED Truth Table & Pin Polarity

Both status indicators on the LPJG4820G4NL are independent bi-color components, enabling full tri-state visual feedback (Off / Green / Yellow):

[ FRONT VIEW ]
     ┌──────────────────────────┐
     │  [LEFT LED]  [RIGHT LED] │
     │  Green/Yellow Green/Yellow│
     │   Pin 11/12    Pin 13/14 │

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