| Part Number | 
Data Rate (Mbps)  | 
Reach (km)  | 
Wavelength (nm)  | 
Source | Case Temp. (°C)  | 
DDM | Others | 
| FS551212 | 622 | 120 | 1550 | DFB + APD | -5 ~ 70 | Yes | SMF, RoHS-6 | 
| FS551212E | 622 | 120 | 1550 | DFB + APD | -10 ~ 85 | Yes | SMF, RoHS-6 | 
| FS551212I | 622 | 120 | 1550 | DFB + APD | -40 ~ 85 | Yes | SMF, RoHS-6 |