HP 1850-0098 transistor, previously unobtainium.
HP part 1850-0098 is a germanium PNP transistor in a TO-3 metal can package from the 1960s, commonly used in instruments for power amplification or switching in analog circuitry.
hFE – DC current gain
IC – collector current
VBE – base-emitter voltage
IB – base current
Your choice (measurements at 21°C):
| manufacturer | part | batch | UUT | hFE | IC (mA) | VBE (V) | IB (mA) | leakage (mA) |
|---|---|---|---|---|---|---|---|---|
| ITT | 1850-0098 | 608 | 1 | 8 | 2.5 | 0.054 | 0.209 | 0.699 |
| ITT | 1850-0098 | 608 | 2 | 8 | 2.5 | 0.067 | 0.246 | 0.461 |
| Motorola | 1850-0098 | 7541 | 1 | 24 | 2.5 | 0.040 | 0.0532 | 1.179 |
| unavailable -Motorola | 1850-0098 | 7544 | 1 | 18 | 2.5 | 0.063 | 0.105 | 0.566 |