The range of SFP (Small Form-Factor Pluggable) transceivers can vary depending on the specific type and intended use. SFP modules are available in different variants, each designed for specific distances and applications. Here are some common SFP variants and their associated ranges:

1. SFP SX (Short Range):

• Typical Range: Up to 550 meters (multimode fiber).

2. SFP LX (Long Range):

• Typical Range: Up to 10 kilometers (single-mode fiber).

3. SFP EX (Extended Range):

• Typical Range: Beyond 10 kilometers, up to 40 kilometers (single-mode fiber).

4. SFP ZX (Zero Dispersion Shifted):

• Typical Range: Beyond 40 kilometers, up to 80 kilometers (single-mode fiber).

5. SFP BX (Bidirectional):

• Typical Range: Varies depending on the specific BX-U (upstream) and BX-D (downstream) modules. Common ranges include 10 kilometers and 20 kilometers.

6. SFP CWDM (Coarse Wavelength Division Multiplexing):

• Typical Range: Varies based on the specific wavelength and CWDM grid. Common ranges include 40 kilometers and 80 kilometers.

It's important to note that the ranges mentioned above are generalizations, and actual performance can depend on factors such as the quality of the optical components, the characteristics of the fiber optic infrastructure, and environmental conditions. Additionally, advancements in optical technology may lead to new SFP variants with extended ranges.

When selecting SFP transceivers for a specific application, it's crucial to refer to the datasheets and specifications provided by the transceiver manufacturer. These documents will provide accurate information on the module's reach, supported data rates, and other relevant details.