SFP transceiver modules typically support up to 1 Gbps and use SFP ports with RJ-45 copper or LC fiber connections, while SFP+ modules support up to 10 Gbps and use SFP+ ports with RJ-45, LC fiber, or direct-attach copper connections. QSFP28 transceiver modules support up to 100 Gbps through QSFP28 ports and MTP/MPO fiber connections, making them well suited for high-speed links in commercial networks, data centers, and server environments.

Choose copper transceiver modules for short-to-medium Ethernet connections using RJ-45 Cat 5 or Cat 6A cable, multimode fiber for higher-speed links over 850 nm fiber and LC connectors, and single-mode fiber for longer links over 1310 nm fiber or bidirectional wavelength-division connections. Choose direct-attach cable modules for short, high-speed connections within a server rack, and match the module’s SFP, SFP+, or QSFP28 form factor to the switch port.

Compare the module’s rated data rate, such as 1 Gbps, 10 Gbps, or 100 Gbps, with the switch port and the bandwidth your system requires. Then check its supported distance over the specified media, which may range from short direct-attach copper links to 80 or 100 meters over Ethernet, 300 or 550 meters over multimode fiber, or up to 20 kilometers over single-mode fiber.

Verify the switch port type and supported data rate, then match the module to the cable media, fiber mode, wavelength, connector, and transmission distance, such as RJ-45 over Cat 5 or Cat 6A, multimode fiber with LC or MTP/MPO connectors, or single-mode fiber with an LC connector. Also confirm that the module fits the network architecture, including Ethernet, SFP, SFP+, QSFP28, or Media over IP requirements, and pair wavelength-division multiplexing modules with their matching counterpart when required.