Bel Fuse SFP-1GBT EOL: How to Avoid Costly Network Redesigns and Maintain Performance

In 2023, Bel Fuse issued an End-of-Life (EOL) notification for its SFP-1GBT series, a widely deployed range of 1G SFP transceivers used across enterprise, telecom, and industrial networking environments. As channel inventory continues to decrease, organisations are challenged with sourcing reliable replacements to maintain network uptime and avoid costly infrastructure redesigns.

The SFP-1GBT series typically supports 1.25Gbps data rates over copper (1000BASE-T) interface, with compliance to IEEE 802.3 standards and compatibility across a broad range of OEM platforms. These modules are commonly deployed in environments requiring low latency, hot-swappable connectivity, and extended operational lifecycles, often within temperature ranges of 0°C to +70°C (commercial) or -40°C to +85°C (industrial).

As a result, organisations are often faced with two options: undertake a full network redesign—incurring significant CAPEX and operational disruption, or identify a form-fit-function compatible alternative that meets the original module’s electrical, optical, and firmware specifications.

ATGBICS are obsolescence specialists, offering fully compatible replacement transceivers for the discontinued Bel Fuse® SFP-1GBT range such as the SFP-1GBT-05-C. Our products match the specifications of the OEM original parts, ensuring your legacy infrastructure can keep running smoothly. Additionally, we proudly offer a compatibility guarantee and lifetime replacement warranty with all our products.

ATGBICS Compatible version of the SFP-1GBT-05 Bel Fuse network transceiver features:

• Up to 1.25Gbps bi-directional data links
• RJ45 Max 100m
• Fully metallic enclosure for low EMI
• Compact RJ-45 Connector assembly
• Hot-pluggable SFP footprint
• Low power dissipation
• RoHS compliant and Lead Free
• Access to physical layer IC via 2-wire serial bus over Cat 5 cable
• 10/100/1000BASE-T operation in host systems with SGMII interface
• Commercial & Industrial Operating Temperature Ranges: (0° to 70°C) and (-40° to 85°C)

Mechanical Specifications

ATGBICS provides a range of Bel Fuse® fibre optic compatible transceivers, including:

If your systems still rely on SFP-1GBT copper transceivers or any other discontinued modules, we’re here to keep them operational. Contact us with your current requirement.