- 4N31SR2
- Fairchild Semiconductor Corporation
- 1 CHANNEL DARLINGTON OUTPUT OPTOCOUPLER
- 4N31SR2M
- Fairchild Semiconductor Corporation
- 1 CHANNEL DARLINGTON OUTPUT OPTOCOUPLER
- 4N31SR2V
- Fairchild Semiconductor Corporation
- 1 CHANNEL DARLINGTON OUTPUT OPTOCOUPLER
- 4N31SR2VM
- Fairchild Semiconductor Corporation
- 1 CHANNEL DARLINGTON OUTPUT OPTOCOUPLER