0820-1X1T-00-F 1000BASE-T RJ45 Connector with Single USB 2.0 Type-A

The Bel Fuse 0820-1X1T-00-F is an industrial-grade 2-in-1 hybrid I/O Integrated Connector Module (ICM) that combines a single-port 1000BASE-T (Gigabit Ethernet) RJ45 MagJack and a single USB 2.0 Type-A Female receptacle into a compact vertical through-hole (THT) package.

Featuring an unlit (Without LED) front bezel, it eliminates digital switching noise and PCB layer crowding while delivering -1.0 dB Max insertion loss across all 4 differential pairs and 1500 Vrms dielectric isolation. The RJ45 port features Tab-Up orientation, while the USB 2.0 port supports up to 1.5 A @ 30 VDC. The contacts are plated with 30 micro-inches hard gold.

Technical Specifications of 0820-1X1T-00-F RJ45 USB Combo Connector

Bel Fuse 0820-1X1T-00-F is a 1000BASE-T RJ45 and USB Type-A combination connector in a right-angle through-hole package. The manufacturer lists a Tab-Up orientation, no LEDs and an operating temperature of 0°C to +70°C. 

0820-1X1T-00-F Datasheet

Mechanical Footprint & Panel Integration Guidelines

1. Overall Outer Body Dimensions:
- Body Depth into PCB: 26.09 mm [1.027 inch]
- Front Mating Face Width: 16.39 mm [0.645 inch]
- Vertical Clearance Height: 20.90 mm [0.823 inch]
- Solder Pin Tail Length: 3.17 mm [0.125 inch] (Ground leads: 3.56 mm [0.140 inch])

2. Recommended PCB Hole Layout (Top View):
- Gigabit Ethernet Signal Leads (8 Signal + CT Pins): Holes of Ø0.89 +0.13/-0.00 mm [Ø0.035" +0.005/-0"]
- Single USB 2.0 Leads (Pins 1–4): 4 holes of Ø0.97 +0.13/-0.00 mm [Ø0.038" +0.005/-0"]
- Mechanical Ground Posts: 4 holes of Ø1.57 mm [Ø0.062"] and 4 holes of Ø2.31 mm [Ø0.091"]
- Important Note: The shaded keep-out area underneath the connector footprint must be kept clear of all via holes and surface component pads.

3. Suggested Panel Bezel Cutout:
- Cutout Opening Width: 17.15 mm [0.675 inch]
- Cutout Opening Height: 21.20 mm [0.835 inch]
- Nominal Distance from Panel Inside Surface to Part Front Face: 2.03 mm [0.080 inch]
- Shell Feature: Continuous top, bottom, and side EMI spring fingers ensure firm 360-degree contact with the chassis enclosure.

4. Wave Soldering Envelope:
- Recommended Peak Temperature: 260°C Max
- Solder Contact Dwell Time: 5 to 10 Seconds Max

Internal 1000BASE-T Magnetics & Dual-Port Schematic Architecture

[ 1000BASE-T ETHERNET PHY SIDE ]     [ RJ45 CABLE SIDE ]
    Pair 1: TRD1+ ──┐ 1CT : 1CT ┌───[Common Mode Choke]─── 1 TRP1+
            TRCT1 ──┼───┐   ┌───┤
            TRD1- ──┘   │   │   └───[Common Mode Choke]─── 2 TRP1-
                        │   │
    Pair 2: TRD2+ ──┐ 1CT : 1CT ┌───[Common Mode Choke]─── 3 TRP2+
            TRCT2 ──┼───┐   ┌───┤
            TRD2- ──┘   │   │   └───[Common Mode Choke]─── 6 TRP2-
                        │   │
    Pair 3: TRD3+ ──┐ 1CT : 1CT ┌───[Common Mode Choke]─── 4 TRP3+
            TRCT3 ──┼───┐   ┌───┤
            TRD3- ──┘   │   │   └───[Common Mode Choke]─── 5 TRP3-
                        │   │
    Pair 4: TRD4+ ──┐ 1CT : 1CT ┌───[Common Mode Choke]─── 7 TRP4+
            TRCT4 ──┼───┐   ┌───┤
            TRD4- ──┘   │   │   └───[Common Mode Choke]─── 8 TRP4-
                        ▼   ▼
        [ Bob Smith Termination: 4x 75Ω Resistors + 1000pF/2kV to Shield ]
  ══════════════════════════════════════════════════════════════════════════════
               [ INTERNAL GROUNDED METAL ISOLATION BARRIER ]
  ══════════════════════════════════════════════════════════════════════════════
                  [ SINGLE USB 2.0 PORT (ISOLATED SHIELDED CAVITY) ]
     USB Port: Pin 1 (VBUS) | Pin 2 (D-) | Pin 3 (D+) | Pin 4 (GND)

1000BASE-T RJ45 + withUSB 2.0 advantages

Full Duplex 4-Pair Gigabit Signal Integrity: Unlike 10/100 combo connectors that only wire 2 pairs, the 0820-1X1T-00-F integrates four full 1CT:1CT magnetic channels. It delivers continuous -35 dB inter-channel crosstalk rejection and preserves eye-diagram margins across full-bandwidth Gigabit Ethernet transceivers.

Cavity Shield Partition Eliminates USB 2.0 Interference: 480 Mbps USB 2.0 differential edge harmonics can radiate into high-frequency Gigabit receivers. Bel Fuse solves this with a patented internal copper alloy grounded shield partition, ensuring common-mode to differential-mode rejection of -40 dB Min.

Why Hardware Designers Choose the NO LEDs Configuration:

• Eliminates Mixed-Signal Noise: Fast-switching digital GPIO signals driving LEDs are removed entirely from the sensitive analog PHY interface.
• Frees Up Routing Channels: Omitting 4 LED pins significantly reduces routing layer congestion around the board edge on compact carrier boards.
• Aesthetic Flexibility: Allows system enclosures to route status indications via precision acrylic light pipes.

Applications and Selection of 1000BASE-T RJ45 with USB

This RJ45 USB A combo can be considered for network equipment, embedded systems and other board-level designs where the manufacturer's electrical and mechanical ratings match the project. Confirm the Ethernet interface architecture and any required external circuitry against the part schematic and PHY reference design.

Frequently Asked Questions

Q1: What is the transmission speed of Bel Fuse 0820-1X1T-00-F?

The Bel Fuse 0820-1X1T-00-F is engineered for 1000BASE-T (Gigabit Ethernet) networks, providing four integrated 1CT:1CT magnetic channels across all eight RJ45 pins. It is fully backward compatible with 10BASE-T and 100BASE-TX.

Q2: What does the "00" suffix mean in Bel Fuse 0820-1X1T-00-F?

In the Bel Fuse MagJack® Combo part numbering system, the "00" suffix designates the connector is unlit (Without LEDs). This configuration is preferred in designs utilizing front-panel light pipes or where engineers want to eliminate LED driver traces to prevent digital noise from coupling into analog Ethernet lines.

Q3: What is the height difference between Bel Fuse 0820 and 08C2 series?

The 0820 series features a single-port USB stacked beneath the RJ45 port with a seated height of approximately 20.90 mm [0.823"]. The 08C2 series features a dual-port USB stacked beneath the RJ45 port, resulting in a taller height of approximately 29.72 mm [1.170"].