| 317361 | BFY51 | General purpose NPN transistor | FERRANTI |
| 317362 | BFY51 | Switching NPN transistor | FERRANTI |
| 317363 | BFY51 | High frequency transistor | mble |
| 317364 | BFY51 | Low frequency transistor | mble |
| 317365 | BFY51 | High frequency transistor | mble |
| 317366 | BFY51 | Silicon n-p-n medium power transistor | Mullard |
| 317367 | BFY51 | NPN Silicon Transistor for high level audio applications | Newmarket Transistors NKT |
| 317368 | BFY51 | NPN medium power transistors | Philips |
| 317369 | BFY51 | MEDIUM POWER AMPLIFIERS | SGS Thomson Microelectronics |
| 317370 | BFY51 | Professional transistor, general purpose switches | SGS-ATES |
| 317371 | BFY51 | Transistor for general purpose amplifiers | SGS-ATES |
| 317372 | BFY51 | MEDIUM POWER AMPLIFIER | ST Microelectronics |
| 317373 | BFY52 | Leaded Small Signal Transistor General Purpose | Central Semiconductor |
| 317374 | BFY52 | General purpose NPN transistor | FERRANTI |
| 317375 | BFY52 | Switching NPN transistor | FERRANTI |
| 317376 | BFY52 | High frequency transistor | mble |
| 317377 | BFY52 | Low frequency transistor | mble |
| 317378 | BFY52 | High frequency transistor | mble |
| 317379 | BFY52 | Silicon n-p-n medium power transistor | Mullard |
|
| 317380 | BFY52 | NPN Silicon Transistor for high level audio applications | Newmarket Transistors NKT |
| 317381 | BFY52 | NPN medium power transistors | Philips |
| 317382 | BFY52 | Professional transistor, general purpose switches | SGS-ATES |
| 317383 | BFY52 | Transistor for general purpose amplifiers | SGS-ATES |
| 317384 | BFY53 | Silicon n-p-n medium power transistor | Mullard |
| 317385 | BFY53 | NPN Silicon Transistor for high level audio applications | Newmarket Transistors NKT |
| 317386 | BFY55 | Leaded Small Signal Transistor General Purpose | Central Semiconductor |
| 317387 | BFY55 | High frequency transistor | mble |
| 317388 | BFY55 | Low frequency transistor | mble |
| 317389 | BFY55 | High frequency transistor | mble |
| 317390 | BFY56 | Professional transistor, general purpose switches | SGS-ATES |
| 317391 | BFY56 | Transistor for general purpose amplifiers | SGS-ATES |
| 317392 | BFY56A | Leaded Small Signal Transistor General Purpose | Central Semiconductor |
| 317393 | BFY56A | Professional transistor, general purpose switches | SGS-ATES |
| 317394 | BFY56A | Transistor for general purpose amplifiers | SGS-ATES |
| 317395 | BFY57 | Leaded Small Signal Transistor General Purpose | Central Semiconductor |
| 317396 | BFY63 | Leaded Small Signal Transistor General Purpose | Central Semiconductor |
| 317397 | BFY63 | VHF Power transistor | Texas Instruments |
| 317398 | BFY64 | Leaded Small Signal Transistor General Purpose | Central Semiconductor |
| 317399 | BFY64 | Bipolar PNP Device | SemeLAB |
| 317400 | BFY64 | Professional transistor, general purpose switches | SGS-ATES |
