S-536170-1 Vintage TO-3 Silicon Power Transistor Military / Industrial Semiconductor USA
$19.99
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.
Pipeline quantities are informational and may change after arrival, inspection, sorting, testing, or donor teardown.
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
Measured Parameters
hFE: 69
IC: 5.00 mA
VBE @ IB = 1.00 mA: 0.526 V
VBE @ IB = 5.00 mA: 0.578 V
VCE(sat): 0.083 V
Saturation Test Current (IC): 5.00 mA
Saturation Base Current (IB): 1.00 mA
ICE Leakage: 0.000 mA
Bench Assessment
Bench verified vintage 536170-1 TO-3 silicon power BJT with Square S logo marking. Measured hFE 69 at IC 5.00 mA, VBE 0.526 V at IB 1.00 mA, VBE 0.578 V at IB 5.00 mA, VCE(sat) 0.083 V at IC 5.00 mA / IB 1.00 mA, and ICE leakage 0.000 mA. Device shows normal silicon junction behavior, stable tra
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