- 4N38.S
- Fairchild Semiconductor
- Phototransistor, HIGHVAGE PHOTOTRANSISTOR OPTOCOUPLERS
- 4N38.SD
- Fairchild Semiconductor
- Phototransistor, High Voltage Phototransistor Phototransistor, Tape and Reel
- 4N38.SDL
- Fairchild Semiconductor Corporation
- 1 CHANNEL TRANSISTOR OUTPUT OPTOCOUPLER