| 4N39 | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N39300 | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N39300W | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N393S | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N393SD | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N39S | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N39SD | Fairchild Semiconductor | |
| 4N39W | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N40 | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N40300 | Fairchild Semiconductor | |
| 4N40300W | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N403S | Fairchild Semiconductor | |
| 4N403SD | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N40S | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N40SD | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N40W | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |