JXF0-2510NL 2.5GBASE-T Integrated RJ45 Connector THR Reflow Mounting

The JXF0-2510NL is an industrial-grade, single-port (1x1) 2.5GBase-T (2.5 Gbps) Integrated Connector Module (ICM / MagJack). It features a 10-pin pure-data configuration with no integrated LEDs and no PoE power circuits. Key technical ratings include an industrial operating temperature of -40°C to +85°C, 2250 VDC dielectric isolation (Pri:Sec), internal 2-wire (2W) signal line common mode chokes, 180 µH minimum open circuit inductance, MSL 1 moisture rating, and full compatibility with Through-Hole Reflow (THR / Pin-in-Paste) automated soldering.

Key Features of JXF0-2510NL 2.5GBase-T MagJack 

• 2.5Gbps Multi-Gigabit Performance: Insertion loss is strictly kept under -1.0 dB across 1–250 MHz, with return loss exceeding -20 dB (1–40 MHz) and -10 dB (100–250 MHz), ensuring exceptional eye diagrams and minimal packet re-transmission.
• Streamlined 10-Pin Footprint: Omitting 4 LED pins and 4 PoE pins drastically reduces through-hole drill density, simplifies 100Ω differential microstrip routing, and preserves PCB ground plane integrity.
• True 2250VDC Galvanic Isolation: Complete primary-to-secondary dielectric barrier protects sensitive 2.5G PHY transceivers against industrial voltage surges and common-mode transients (UL 62368-1 Certified).
• 2W Symmetrical Signal Line Choke: Specifically optimized for pure data lines to deliver enhanced common-mode noise suppression (CMRR down to -35 dB @ 10–125 MHz) without DC bias saturation risks.
• Automated THR Assembly: Manufactured from high-temperature UL 94V-0 thermoplastic with 3.20 mm matte-tin solder tails compliant with IPC/JEDEC J-STD-075 (Category R7, 260°C peak reflow).

Specification of JXF0-2510NL THR RJ45 Connector

1. High-Frequency RF Performance (@ 25°C, Operating -40°C to +85°C)

2. Environmental, Material & Mechanical Ratings

JXF0-2510NL RJ45 Datasheet - Schematic

PCB Layout

The official mechanical drawing shows a recommended component-side PWB layout with:

10 × Ø0.89 mm signal holes
2 × Ø1.57 mm guide holes
2 × Ø3.25 mm shield mounting holes

and a defined keep-out region around the shield structure.

For the PHY-to-MagJack interface, engineering review should focus on:

• controlled differential impedance;
• continuous reference strategy;
• matched differential-pair routing;
• minimum unnecessary vias;
• short and direct PHY-to-magnetics routing;
• separation from noisy switching nodes;
• correct chassis/system-ground treatment around the shield.

A high-interaction Reddit PCB review on Ethernet routing received +72 votes, with the discussion focusing on differential-pair spacing, impedance and crosstalk. Another engineering discussion specifically stresses that RJ45-to-magnetics routing should be impedance-matched and length-controlled.

The same concern appears in an Electrical Engineering Stack Exchange discussion about Ethernet magnetics layout, where engineers discuss differential-pair routing, reference-plane treatment and Bob Smith termination.

FAQs About JXF0-2510NL 2.5GBase-T RJ45 MagJack

Q1: Can JXF0-2510NL be dropped directly onto a JXF0-1010NL (1G) PCB layout?

A: Yes, 100%. The mechanical outline, standoff pegs, shield tabs, and 10 signal pins share the exact same footprint coordinates and drill diameters. Upgrading a board from 1Gbps to 2.5Gbps requires zero PCB artwork modifications.

Q2: Why is a non-LED connector preferred for 2.5G industrial PCs and vision systems?

A: Many industrial PCs utilize custom light pipes mounted into an aluminum front bezel to display unified system status; integrated LEDs on the jack would bleed light internally. In machine vision cameras, stray LED light can corrupt high-gain optical sensor readings. Furthermore, omitting LED pins simplifies PCB trace routing.

Q3: Does JXF0-2510NL support lead-free through-hole reflow (THR)?

A: Yes. Compliant with IPC/JEDEC J-STD-020 MSL 1 and J-STD-075 Category R7, the high-temperature housing withstands full reflow soldering profiles with peak temperatures up to 260°C without plastic blistering or contact misalignment.