| Manufacturer | Part Number | Description |
|---|---|---|
America Semiconductor
| 1N3331 | 50W Zener Diode |
Naina Semiconductor
| 1N3331B | (1N3305B - 1N3350B) Zener Diodes |
| Solid State | 1N3331 | 50WATTS ZENER DIODES |
Microsemi (now Microchip Technology)
| 1N3331B | 50WATT ZENER DIODES |
