| 4N25 | Agilent | 4N25 · General Purpose Phototransistor Optocoupler |
| 4N25 | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N25 | Toshiba | Photocouplers - Transistor Output |
| 4N25 | Vishay | Optocouplers |
| 4N25-000E | Agilent | 4N25-000E · Lead Free General Purpose Phototransistor Optocoupler |
| 4N25-M | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N25-X006 | Vishay | Optocouplers |
| 4N25-X007 | Vishay | Optocouplers |
| 4N25-X009 | Vishay | Optocouplers |
| 4N25300 | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N25300W | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N253S | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N253SD | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N25FM | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N25FR2M | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N25FR2VM | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N25FVM | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N25GV | Vishay | Optocouplers |
| 4N25M | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
| 4N25S | Fairchild Semiconductor | 6-Pin DIP Package Phototransistor Output Optocoupler |
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