SFP Module Extralink 1.25G 1310/1550nm 20km

The Extralink SFP Module 1.25G 1310/1550nm 20km is a single-mode bidirectional transceiver designed for optical network links up to 20 km. Supporting a data rate of 1.25 Gbps and operating on 1310 nm and 1550 nm wavelengths, this SFP module is housed in a metal casing for mechanical stability and thermal dissipation. It is intended for use with single-mode fiber (SMF) networks and requires a 3.3 V input supply while remaining compact and lightweight for easy installation in compatible SFP ports.

Advantages

The module provides a straightforward plug-and-play solution for extending fiber connections without requiring complex configuration. Metal housing enhances durability and heat management, and the bidirectional WDM design reduces the need for paired fibers by allowing transmission and reception on different wavelengths. Compliance with laser safety Class I and RoHS ensures adherence to common safety and environmental standards.

Suitable for

• Gigabit Ethernet links over single-mode fiber
• Switch-to-switch fiber connections and backplane interfaces
• Router-to-server or server-to-storage optical links
• Optical transmission systems requiring up to 20 km reach

Key specifications

• Interface type: SFP (small form-factor pluggable)
• Data transfer rate: up to 1.25 Gbit/s
• Wavelengths: 1310 nm and 1550 nm (bidirectional WDM)
• Maximum transmission distance: up to 20 km over single-mode fiber
• Housing: metal case for improved durability and thermal performance
• Operating voltage: 3.3 V
• Weight: 0.051 kg
• Colour: silver
• Optical safety: Class I laser compliance

How to use

Insert the SFP module into a compatible SFP slot on your network device while the device is powered down or following the device vendor’s hot-swap guidelines. Connect single-mode fiber with the appropriate SC connectors, ensuring that transmit and receive wavelengths are paired correctly with the counterpart module (1310 nm ↔ 1550 nm). After physical installation, verify link status and interface configuration via the host device management tools and monitor optical levels to confirm reliable operation.

Usage recommendations

Use certified single-mode fiber (SMF) with proper SC connectors and maintain clean fiber endfaces to prevent signal degradation. For best results, ensure transceiver pairs are matched (one 1310 nm module with one 1550 nm module) and observe manufacturer guidelines for ESD protection and operating temperature ranges. Regularly check device and link diagnostics to detect potential issues early.