| 4N33 | Vishay | Optocouplers |
| 4N33-X007 | Vishay | Optocouplers |
| 4N33-X009 | Vishay | Optocouplers |
| 4N33300 | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N33300W | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N333S | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N333SD | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N33M | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N33S | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N33SD | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N33W | Fairchild Semiconductor | 6-Pin DIP Photodarlington Output Optocoupler |
| 4N35 | Agilent | 4N35 · General Purpose Phototransistor Optocoupler |
| 4N35 | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N35 | Toshiba | Photocouplers - Transistor Output |
| 4N35 | Vishay | Optocouplers |
| 4N35-000E | Agilent | 4N35-000E · Lead Free General Purpose Phototransistor Optocoupler |
| 4N35-M | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N35-X006 | Vishay | Optocouplers |
| 4N35-X007 | Vishay | Optocouplers |
| 4N35-X009 | Vishay | Optocouplers |