| 121201 | 4N30(SHORT) | PHOTOCOUPLER GaAs IRED & PHOTO-TRANSISTOR | TOSHIBA |
| 121202 | 4N30300 | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121203 | 4N30300W | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121204 | 4N303S | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121205 | 4N303SD | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121206 | 4N30M | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121207 | 4N30S | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121208 | 4N30SD | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121209 | 4N30W | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121210 | 4N31 | GENERAL PURPOSE 6-PIN PHOTODARLINGTON OPTOCOUPLERS | Fairchild Semiconductor |
| 121211 | 4N31 | STANDARD THRU HOLE CASE 730A-04 | Motorola |
| 121212 | 4N31 | GENERAL PURPOSE 6-PIN PHOTODARLINGTON OPTOCOUPLERS | QT Optoelectronics |
| 121213 | 4N31 | PHOTO TRANSISTOR (AC LINE/DIGITAL LOGIC ISOLATOR) | TOSHIBA |
| 121214 | 4N31(SHORT) | PHOTOCOUPLER GaAs IRED & PHOTO-TRANSISTOR | TOSHIBA |
| 121215 | 4N31300 | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121216 | 4N31300W | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121217 | 4N313S | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121218 | 4N313SD | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121219 | 4N31S | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
|
| 121220 | 4N31SD | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121221 | 4N31W | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121222 | 4N32 | GENERAL PURPOSE 6-PIN PHOTODARLINGTON OPTOCOUPLERS | Fairchild Semiconductor |
| 121223 | 4N32 | STANDARD THRU HOLE CASE 730A-04 | Motorola |
| 121224 | 4N32 | GENERAL PURPOSE 6-PIN PHOTODARLINGTON OPTOCOUPLERS | QT Optoelectronics |
| 121225 | 4N32 | PHOTODARLINGTON OPTOCOUPLER | Siemens |
| 121226 | 4N32 | Optoelectronic coupling element (Optocoupler) | TELEFUNKEN |
| 121227 | 4N32 | Photocouplers - Transistor Output | TOSHIBA |
| 121228 | 4N32 | Optocoupler, Photodarlington Output, High Gain, With Base Connection | Vishay |
| 121229 | 4N32(SHORT) | PHOTOCOUPLER GaAs IRED & PHOTO-TRANSISTOR | TOSHIBA |
| 121230 | 4N32-X007 | Optocouplers | Vishay |
| 121231 | 4N32-X009 | Optocouplers | Vishay |
| 121232 | 4N32300 | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121233 | 4N32300W | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121234 | 4N323S | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121235 | 4N323SD | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121236 | 4N32A | PHOTO TRANSISTOR (AC LINE/DIGITAL LOGIC ISOLATOR) | TOSHIBA |
| 121237 | 4N32A(SHORT) | PHOTOCOUPLER GaAs IRED & PHOTO-TRANSISTOR | TOSHIBA |
| 121238 | 4N32M | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121239 | 4N32S | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
| 121240 | 4N32SD | 6-Pin DIP Photodarlington Output Optocoupler | Fairchild Semiconductor |
