RCA 40250 NPN Silicon Power Transistor Tested Pair
$49.99
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 pair demonstrated exceptionally strong bench results with hFE readings of 218 and 200, extremely low saturation voltage readings, and zero collector leakage on both devices. The devices exhibit very similar electrical characteristics, making them an excellent pair for restoration, repair, maintenance, and replacement applications.
The RCA 40250 is an increasingly difficult-to-source vintage semiconductor and remains desirable among electronics repair technicians, restoration specialists, collectors, amateur radio operators, and industrial maintenance personnel who prefer original USA-manufactured components.
This listing includes the exact pair shown in the photographs. Both transistors retain original RCA markings, TO-3 metal can construction, and vintage manufacturing codes.
Origin Tracker
NOS / New Old Stock
Unused new old stock from legacy inventory. Packaging, age, and cosmetic condition may vary.
Pipeline quantities are informational and may change after arrival, inspection, sorting, testing, or donor teardown.
Compatible Radios / Boards
Vintage audio amplifier repair
Power amplifier restoration
Linear power supply repair
Industrial control equipment
Legacy RCA semiconductor replacement
Amateur radio equipment repair
CB radio equipment restoration
Vintage communications equipment
Test equipment restoration
Obsolete electronics maintenance
Electronics education and training
Semiconductor collections
Custom power transistor projects
TO-3 restoration work
RF Boneyard Bench Notes
NPN Silicon BJT
Red-B Green-C Blue-E
hFE=200 at Ic=4.99mA
Vbe=0.531V at Ib=1.00mA
Vbe=0.596V at Ib=5.00mA
VceSat=0.020V at Ic=5.0mA and Ib=1.00mA
IcLeak=0.000mA
Both RCA 40250 transistors tested good.
Both identified as NPN Silicon BJT.
Very close gain readings: hFE 218 and hFE 200.
Very close Vbe and VceSat readings.
Zero collector leakage detected on both devices.
Excellent close-tested RCA 40250 pair.
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