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What is the maximum distance for SFP?
Knowledge Base + 2024.01.09

The maximum distance for an SFP (Small Form-Factor Pluggable) transceiver depends on the type of SFP module, the optical fiber used, and the specific application. SFP modules support a variety of data rates, and the distance capabilities can vary based on the module's design and the type of optical fiber it is intended to work with.

Here are some common types of SFP modules and their associated distance ranges:

  1. SX (Short-Range) SFP:

    • Data Rate: Typically supports data rates up to 1 Gbps.

    • Distance: Up to 550 meters over multimode fiber (OM2, OM3, or OM4).

  2. LX (Long-Range) SFP:

    • Data Rate: Supports data rates up to 1 Gbps.

    • Distance: Up to 10 kilometers over single-mode fiber.

  3. EX (Extended-Range) SFP:

    • Data Rate: Supports data rates up to 1 Gbps.

    • Distance: Beyond 40 kilometers over single-mode fiber.

It's important to note that the distances mentioned above are general guidelines, and actual performance may vary based on factors such as the quality of the optical components, the specific implementation, and the condition of the fiber optic infrastructure.

For higher data rates, such as 10 Gbps, 25 Gbps, or 40 Gbps, there are corresponding SFP+ (SFP Plus), SFP28, and QSFP (Quad Small Form-Factor Pluggable) modules that support longer distances over both multimode and single-mode fibers.

When selecting an SFP module for a specific application, always refer to the manufacturer's specifications and compatibility guidelines. The datasheet for the SFP module will provide detailed information on its supported data rates, distance capabilities, and the types of optical fibers it is compatible with.