| Manufacturer | Part Number | Description |
|---|---|---|
NTE Electronics (defunct) |
MPSL51 | Silicon PNP Transistor |
Motorola Semiconductor (now NXP Semiconductors) |
MPSL51 | Amplifier Transistor |
Continental Device India |
MPSL51 | PNP SILICON PLANAR EPITAXIAL TRANSISTOR |
| MPSL51 | PNP General Purpose Amplifier | |
| MPSL51 | Amplifier Transistor |