| 4N28VM | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N28W | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N29 | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N29 | Toshiba | Photocouplers - Transistor Output |
| 4N29300 | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N29300W | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N293S | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N293SD | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N29S | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N29SD | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N29W | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N30 | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N30300 | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N30300W | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N303S | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N303SD | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N30S | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N30SD | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N30W | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N31 | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |