Finisar SFP+, SFP28, and SFP56 transceivers represent the evolution of the Small Form-factor Pluggable (SFP) interface, offering a versatile range of high-speed connectivity options for modern enterprise and data center networks. While these modules share the same compact physical dimensions, they are engineered to support vastly different data rates and application needs.
The High-Speed SFP Family
Finisar SFP+ (10G)
The industry standard for 10 Gigabit Ethernet and 8G/10G/16G Fibre Channel. These modules are the primary choice for connecting servers to Top-of-Rack (ToR) switches. They are highly valued for their low power consumption and the ability to support both short-reach (SR) multimode fiber and long-reach (LR) single-mode fiber.
Finisar SFP28 (25G)Designed for the next generation of server connectivity, SFP28 modules provide 25 Gigabit Ethernet performance. They utilize the same physical form factor as SFP+ but are optimized for higher-speed electrical lanes. This makes them the ideal upgrade path for data centers looking to increase bandwidth by 2.5x without increasing the rack footprint.
Finisar SFP56 (50G)The latest advancement in the SFP family, SFP56 modules utilize PAM4 (Pulse Amplitude Modulation) signaling to achieve 50 Gigabit Ethernet throughput. These are commonly used in high-performance computing (HPC) environments and for high-speed switch-to-switch uplinks.
