| 4N39 | Vishay | Optocouplers |
| 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 |
| 4N39W | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N40 | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 4N40300W | Fairchild Semiconductor | 6-Pin DIP Photo SCR Output Optocoupler |
| 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 |
| 4N45 | Agilent | 4N45 · High Gain Darlington Output Optocouplers |
| 4N46 | Agilent | 4N46 · High Gain Darlington Output Optocouplers |
| 4N55 | Agilent | 4N55 · Hermetically Sealed, Transistor Output Optocouplers for Analog and Digital Applications |
| 4N55/883B | Agilent | 4N55/883B · Hermetically Sealed, Transistor Output Optocouplers for Analog and Digital Applications |