| Part Number | 
Data Rate (Gbps)  | 
Reach (km)  | 
Wavelength (nm)  | 
Source | Case Temp. (°C)  | 
DDM | Others | 
| FS55EGL4 | 8.5 | 40 | 1550 | EML + PIN | 0 ~ 70 | Yes | SMF, RoHS-6 | 
| FS55EGL4E | 8.5 | 40 | 1550 | EML + PIN | -10 ~ 85 | Yes | SMF, RoHS-6 | 
| FS55EGL4I | 8.5 | 40 | 1550 | EML + PIN | -40 ~ 85 | Yes | SMF, RoHS-6 |