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.
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
Industrial Power Supplies
Vintage Audio Amplifiers
Military Electronics
Laboratory Instruments
Communications Equipment
Control Cabinets
Legacy Test Equipment
OEM Power Modules
RF Boneyard Bench Notes
Bench Test Results
Device Type: Silicon Power BJT
Manufacturer: Unknown / Square S Logo House-Marked OEM
Part Number: 536170-1
Package: TO-3 Metal Can
Lead Marking: B / E stamped on flange
Measured Parameters
hFE: 73
IC: 5.00 mA
VBE @ IB = 1.00 mA: 0.520 V
VBE @ IB = 5.00 mA: 0.573 V
VCE(sat): 0.075 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 73 at IC 5.00 mA, VBE 0.520 V at IB 1.00 mA, VBE 0.573 V at IB 5.00 mA, VCE(sat) 0.075 V at IC 5.00 mA / IB 1.00 mA, and ICE leakage 0.000 mA. Device shows normal silicon junction behavior, stable transistor action, and no measurable leakage during testing.
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