RCA 40250 NPN Silicon Power Transistor Tested Pair
$39.99
Genuine RCA 40250 NPN silicon power transistors offered as a tested pair (2 pieces). Made in USA and manufactured by RCA in the classic TO-3 metal can package.
This tested pair demonstrated close electrical characteristics, with hFE readings of 51 and 57, closely matched Vbe measurements, low saturation voltage readings, and zero collector leakage on both devices.
The RCA 40250 is a vintage USA-manufactured semiconductor that is becoming increasingly difficult to locate in original RCA form. These devices are desirable for restoration work, industrial electronics maintenance, amplifier repair, power supply service, communications equipment repair, and collector inventory.
This listing includes the exact pair shown in the photographs. Both transistors retain original RCA markings and classic TO-3 metal can construction.
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.
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Semiconductor collections
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TO-3 restoration work
RF Boneyard Bench Notes
Both RCA 40250 transistors tested good.
Both identified as NPN Silicon BJT.
Both use Red-B / Green-E / Blue-C pinout.
Very close gain readings: hFE 51 and hFE 57.
Very close Vbe readings.
Very close VceSat readings.
Zero collector leakage detected on both dev
Vices.
Both RCA 40250 transistors tested good.
Both identified as NPN Silicon BJT.
Both use Red-B / Green-E / Blue-C pinout.
Very close gain readings: hFE 51 and hFE 57.
Very close Vbe readings.
Very close VceSat readings.
Zero collector leakage detected on both devices.
Excellent tested pair.
Excellent tested pair.
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