S-536170-1 Vintage TO-3 Silicon Power Transistor Military / Industrial Semiconductor USA
Full Description & History
Vintage 536170-1 TO-3 metal can power transistor with square S logo marking and stamped B / E lead identifiers on the flange. This appears to be an OEM, military, or industrial house-numbered semiconductor rather than a common retail-numbered transistor. The 7508 marking likely indicates a vintage production/date or lot code.
This device is suitable for vintage electronics restoration, industrial equipment repair, power supply repair, audio amplifier service, test equipment restoration, and collector inventory. Because this is a house-marked part, the buyer must verify compatibility before installation.
Origin Tracker
Obsolete Stock
Legacy or discontinued stock no longer in normal production flow. Future supply may be limited.
Pipeline quantities are informational and may change after arrival, inspection, sorting, testing, or donor teardown.
Compatible Radios / Boards
Compatible Radios / Boards
Industrial Power Supplies
Vintage Audio Amplifiers
Military Electronics
Laboratory Instruments
Communications Equipment
Control Cabinets
Legacy Test Equipment
OEM Power Modules
RF Boneyard Bench Notes
RF Boneyard Bench Notes
| Metric | Result |
| -------------------------- | ------------------------ |
| Device Type | NPN Silicon BJT |
| Pinout | Red-B, Green-C, Blue-E |
| hFE | 52 @ Ic = 5.00mA |
| Vbe @ Ib = 1.00mA | 0.548V |
| Vbe @ Ib = 5.00mA | 0.597V |
| VceSat | 0.039V |
| VceSat Test Conditions | Ic = 5.00mA, Ib = 1.00mA |
| Collector Leakage (IcLeak) | 0.000mA |
Gain Test: PASS
Junction Test: PASS
Leakage Test: PASS
Saturation Test: PASS
Shorted Junctions:
NONE DETECTED
Open Junctions:
NONE DETECTED
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