| 121001 | 4N25GV | Optocoupler, Phototransistor Output | Vishay |
| 121002 | 4N25M | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121003 | 4N25M-V | GENERAL PURPOSE TYPE PHOTOCOUPLER | Lite-On Technology Corporation |
| 121004 | 4N25S | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121005 | 4N25S-TA | GENERAL PURPOSE TYPE PHOTOCOUPLER | Lite-On Technology Corporation |
| 121006 | 4N25S-TA1 | GENERAL PURPOSE TYPE PHOTOCOUPLER | Lite-On Technology Corporation |
| 121007 | 4N25S-V | GENERAL PURPOSE TYPE PHOTOCOUPLER | Lite-On Technology Corporation |
| 121008 | 4N25SD | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121009 | 4N25SHORT | PHOTO TRANSISTOR (AC LINE/DIGITAL LOGIC ISOLATOR) | TOSHIBA |
| 121010 | 4N25SHORT | PHOTO TRANSISTOR (AC LINE/DIGITAL LOGIC ISOLATOR) | TOSHIBA |
| 121011 | 4N25SM | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121012 | 4N25SR2 | GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS | Fairchild Semiconductor |
| 121013 | 4N25SR2M | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121014 | 4N25SR2V | GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS | Fairchild Semiconductor |
| 121015 | 4N25SR2VM | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121016 | 4N25STA-V | GENERAL PURPOSE TYPE PHOTOCOUPLER | Lite-On Technology Corporation |
| 121017 | 4N25STA1-V | GENERAL PURPOSE TYPE PHOTOCOUPLER | Lite-On Technology Corporation |
| 121018 | 4N25SV | GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS | Fairchild Semiconductor |
| 121019 | 4N25SVM | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
|
| 121020 | 4N25T | GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS | Fairchild Semiconductor |
| 121021 | 4N25TM | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121022 | 4N25TV | GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS | Fairchild Semiconductor |
| 121023 | 4N25TVM | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121024 | 4N25V | Optocoupler, Phototransistor Output | Vishay |
| 121025 | 4N25VM | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121026 | 4N25W | 6-Pin DIP Package Phototransistor Output Optocoupler | Fairchild Semiconductor |
| 121027 | 4N26 | GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS | Fairchild Semiconductor |
| 121028 | 4N26 | 6-Pin DIP Optoisolators Transistor Output | Motorola |
| 121029 | 4N26 | GAAS INFRARED EMITTING DIODE | QT Optoelectronics |
| 121030 | 4N26 | Optoelectronic coupling element (Optocoupler) | TELEFUNKEN |
| 121031 | 4N26 | Optocoupler 6-PDIP | Texas Instruments |
| 121032 | 4N26 | Optocoupler, Phototransistor Output, With Base Connection | Vishay |
| 121033 | 4N26(SHORT) | Photocoupler GaAs IRed & Photo .Transistor | TOSHIBA |
| 121034 | 4N26-M | GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS | Fairchild Semiconductor |
| 121035 | 4N26-V | GENERAL PURPOSE TYPE PHOTOCOUPLER | Lite-On Technology Corporation |
| 121036 | 4N26-X006 | Optocouplers | Vishay |
| 121037 | 4N26-X007 | Optocouplers | Vishay |
| 121038 | 4N26-X009 | Optocouplers | Vishay |
| 121039 | 4N26.300 | GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS | Fairchild Semiconductor |
| 121040 | 4N26.300W | GENERAL PURPOSE 6-PIN PHOTOTRANSISTOR OPTOCOUPLERS | Fairchild Semiconductor |
