GB40SFA SFP Module | 1000Base, Tx: 1310nm, Rx: 1550nm, LC, SMF, 40km

1000Base SFP Module for 40km Singlemode Fiber

The VERSITRON GB40SFA is a 1000Base SFP module designed to extend Gigabit Ethernet connectivity over singlemode fiber distances up to 40 kilometers.

The module uses 1310nm for transmission and 1550nm for reception, providing complementary wavelength operation with the GB40SFB. This makes the GB40SFA a practical solution for long-distance Gigabit Ethernet links where reliable fiber connectivity is required.

According to the VERSITRON Fiber Optic SFP Modules datasheet, the GB40SFA provides 1000Mbps operation over 40km of singlemode fiber with an LC connector.

Long-Distance 1Gbps Fiber Connectivity

The GB40SFA combines Gigabit Ethernet performance with a 40km singlemode fiber reach, allowing network designers to extend network connectivity well beyond the practical limitations of copper Ethernet.

Its LC fiber interface provides a compact connection for compatible SFP-enabled network switches, media converters, and other networking equipment.

The GB40SFA is rated for operation from 0°C to 70°C, making it suitable for a wide range of indoor and controlled networking environments.

GB40SFA and GB40SFB: Complementary 40km SFP Modules

The GB40SFA and GB40SFB are complementary wavelength SFP modules designed to work together for long-distance Gigabit Ethernet fiber links.

The VERSITRON datasheet lists both modules as 1000Mbps, 40km singlemode SFPs with LC connectors, with their transmit and receive wavelengths reversed.

For a complementary wavelength connection, install the GB40SFA at one end and GB40SFB at the opposite end of the fiber link.

GB40SFA Technical Specifications

These specifications are taken from the VERSITRON Fiber Optic SFP Modules datasheet.

Typical Applications

The GB40SFA is well suited for network applications requiring high-speed, long-distance connectivity over singlemode fiber.

• Enterprise Network Backbones – Extend Gigabit Ethernet between buildings and network locations.
• Campus Networks – Connect facilities across large campuses using singlemode fiber.
• Telecommunications Networks – Support long-distance fiber optic infrastructure.
• Industrial Networks – Connect remote industrial network equipment over fiber.
• Government Networks – Extend secure network connectivity between facilities.
• Data Center Connectivity – Provide long-distance fiber links between network equipment.
• Security and Surveillance Networks – Connect remote IP-based security infrastructure where long-distance fiber is required.
• Remote Site Connectivity – Extend Gigabit Ethernet to locations beyond the practical reach of copper cabling.

Industry-Standard SFP Design

The GB40SFA uses an industry-standard Small Form Pluggable (SFP) design with an LC fiber connector. VERSITRON's SFP modules feature hot-pluggable operation, a 3.3V single power supply, TTL signal detection, and differential LVPECL inputs and outputs.

The modules also use a Class 1 laser compliant with EN 60825-1.

Selecting the Right 1000Base SFP Module

VERSITRON offers a range of Gigabit SFP modules for different fiber types, wavelengths, and transmission distances. The product family includes multimode and singlemode options, as well as complementary wavelength modules for extended singlemode fiber links.

When selecting an SFP module, consider:

• Data rate – 100Mbps, 1000Mbps, or 10Gbps
• Fiber type – Multimode or singlemode
• Transmission distance – Select the appropriate distance rating
• Wavelength – Match the wavelength requirements of the network
• Connector type – VERSITRON SFP modules use LC fiber connectors
• Complementary module – Verify the transmit and receive wavelengths of the modules at both ends of the link

For a 40km complementary wavelength application:

• GB40SFA: 1310nm Tx / 1550nm Rx
• GB40SFB: 1550nm Tx / 1310nm Rx

Why Choose VERSITRON?

VERSITRON provides fiber optic communication products designed for demanding commercial, industrial, government, military, transportation, telecommunications, and infrastructure applications.

Our SFP portfolio provides multiple combinations of data rate, fiber type, wavelength, connector, and transmission distance, giving network designers flexibility when building or expanding fiber optic networks. VERSITRON also offers CWDM, DWDM, and DDM modules for specialized fiber optic networking requirements.

VERSITRON — Safeguarding Communications Since 1958

Since 1958, VERSITRON has provided fiber optic communication and networking solutions for applications where reliable connectivity matters. Our product line includes fiber optic media converters, network switches, SFP modules, and other communication equipment designed for demanding network environments.

Need help selecting a 1000Base SFP module? Contact VERSITRON for assistance selecting the appropriate wavelength, fiber type, transmission distance, and complementary SFP for your application.