JXF0-1011NL Through-hole Reflow RJ45 Gigabit MagJack With 2250VDC Isolation

JXF0-1011NL THR RJ45 Magjack Overview

The JXF0-1011NL is a robust single-port Gigabit RJ45 Integrated Connector Module (ICM) designed for embedded industrial computing, programmable logic controllers (PLCs), factory robotics, and precision instrumentation. Meeting full IEEE 802.3 specifications, it integrates 1:1 isolation transformers, common mode termination, and a 2-wire (2W) signal line common mode choke into an FCC-compliant footprint.

Equipped with dual Green/Yellow bi-colour LEDs, the JXF0-1011NL provides real-time link, speed, and activity diagnostics without external light pipes. Constructed from high-temperature UL 94V-0 thermoplastic, the connector is specifically engineered for Through-Hole Reflow (THR / Pin-in-Paste) SMT assembly lines. With an MSL 1 rating and J-STD-075 R7 (260°C peak reflow) certification, it eliminates secondary wave soldering, reducing assembly defects and cycle times.

Key Architectural Highlights:

• True Primary-to-Secondary 2250VDC Isolation: Because this is a pure data (Non-PoE) architecture, complete dielectric isolation is maintained across the entire magnetics assembly, safeguarding PHY transceivers from field surges.
• Dual Bi-Colour Diagnostic LEDs: Left and right bi-directional LEDs (568nm green / 585nm yellow) allow multi-state status indications driven by dedicated Pins 11–14.
• Low High-Frequency Attenuation: Superior insertion loss (-1.5 dB max up to 125MHz) and return loss (-16 dB min @ 1–40MHz) guarantee clean eye diagrams and low packet error rates.
• SMT-Ready THR Construction: 3.20 mm matte-tin solder tails allow automated paste-in-hole reflow soldering, conforming to IPC-A-610 Class 3 barrel-fill requirements.

Technical Specifications of JXF0-1011NL ICM

JXF0-1011NL 1000Base-T RJ45 with LEDs Datasheet:

1. JXF0-1011NL RJ45 Datasheet - Schematic

2. JXF0-1011NL RJ45 Connector Mechanicals 

Mechanical Dimensions & Pinout Guide: 

PCB RECOMMENDED PINOUT (Component Side View - 14 Pins)
   [12] [11] (Left Bi-Colour LED)             [14] [13] (Right Bi-Colour LED)
       [10] [8]  [6]  [4]  [2]   <- Signal Row 2
         [9]  [7]  [5]  [3]  [1]   <- Signal Row 1
 (Shield Post)                                          (Shield Post)

• Physical Outline: 16.80 mm (Width) × 25.53 mm (Length) × 13.50 mm (Height above PCB).
• Suggested Panel Cutout: 17.82 mm × 14.01 mm. Latch orientation: Latch-Up.
• Pin Assignments (14 Electrical Pins + 2 Shield Tabs):
  • Pin 1: CT 1 (Center Tap for channel 1)
  • Pins 2 & 3: TRD1+ / TRD1-
  • Pins 4 & 5: TRD2+ / TRD2-
  • Pins 6 & 7: TRD3+ / TRD3-
  • Pins 8 & 9: TRD4+ / TRD4-
  • Pin 10: Bob Smith chassis termination (isolated via 1000pF / 2kV capacitor and 4× 75Ω resistors)
  • Pins 11 & 12: Drive Left Bi-colour LED (Anti-parallel: Pin 11+/12- = Green; Pin 12+/11- = Yellow)
  • Pins 13 & 14: Drive Right Bi-colour LED (Anti-parallel: Pin 13+/14- = Green; Pin 14+/13- = Yellow)
• Drill Hole Specifications:
• • 10× Signal Holes: Finished diameter Ø0.89 mm (Pad diameter: Ø1.40 mm recommended).
  • 4× LED Holes: Finished diameter Ø1.02 mm.
  • 2× Plastic Standoff Pegs: Ø1.57 mm.
  • 2× Shield Grounding Posts: Ø3.25 mm.

THR / Pin-in-Paste Processing:

JXF0-1011NL belongs to the JX0 Pin-in-Paste / Through-Hole Reflow platform.

Supported assembly processes include: Pin-in-Paste / THR and wave soldering.

The manufacturer specifies J-STD-020 Level 1 and J-STD-075 R7, including a 260°C maximum through-wave-solder condition.

Frequently Asked Questions: 

Q1: How do I wire a microcontroller GPIO to drive the bi-colour LEDs on Pins 11–14?

A: The internal LEDs are wired anti-parallel. Connect Pin 11 and Pin 12 to two separate push-pull GPIOs with a current-limiting resistor (e.g., 150Ω–330Ω for 3.3V VCC). Setting GPIO_A HIGH and GPIO_B LOW lights Green (568nm); setting GPIO_A LOW and GPIO_B HIGH lights Yellow (585nm). Setting both LOW or HIGH turns the LED OFF.

Q2: Can JXF0-1011NL be installed on a PCB footprint designed for JXF0-1012NL?

A: Yes. The JXF0-1012NL footprint has 18 holes (10 signal + 4 LED + 4 PoE). The JXF0-1011NL aligns with the 10 signal and 4 LED holes, leaving the 4 PoE holes (Pins 15–18) completely unpopulated.

Q3: Why does JXF0-1011NL feature a 2-wire choke instead of a 3-wire choke?

A: Since there is no PoE DC bias current in the JXF0-1011NL, a 2-wire signal line choke on the cable side provides symmetrical common-mode attenuation without the stray capacitance or insertion loss associated with a third PoE center-tap tap winding.