| Part Number  | Data Rate (Gbps) | Reach (km) | Wavelength (nm) | Source | Case Temp. (°C) | DDM | Others | 
| FS5548L8 | 2.5 | 80 | 1550 | DFB + APD | -5 ~ 70 | Yes | SMF, RoHS-6 | 
| FS5548L8E | 2.5 | 80 | 1550 | DFB + APD | -10 ~ 85 | Yes | SMF, RoHS-6 | 
| FS5548L8I | 2.5 | 80 | 1550 | DFB + APD | -40 ~ 85 | Yes | SMF, RoHS-6 |