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.
These vintage RCA semiconductors are increasingly difficult to locate and remain desirable among restoration specialists, electronics repair technicians, collectors, industrial maintenance departments, and hobbyists seeking authentic USA-manufactured replacement components.
The RCA 40250 utilizes rugged TO-3 metal can construction and was designed for power transistor applications requiring reliability and durability. These devices are suitable for restoration of legacy equipment, industrial electronics repair, power supply servicing, amplifier projects, and replacement of obsolete semiconductor devices where original RCA components are preferred.
This listing includes the exact pair shown in the photographs. Both transistors retain original RCA markings, matching date codes, classic TO-3 construction, and have been individually verified prior to cataloging.
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
Vintage audio amplifier repair
Power amplifier restoration
Linear power supply repair
Industrial control equipment
Legacy RCA semiconductor replacement
Amateur radio equipment projects
CB radio equipment repair
Vintage communications equipment
Test equipment restoration
Obsolete electronics maintenance
Educational semiconductor study
Electronics collections and displays
Custom power transistor projects
RF Boneyard Bench Notes
NPN Silicon BJT
Red-B Green-C Blue-E
hFE=49 at Ic=5.00mA
Vbe=0.526V at Ib=1.00mA
Vbe=0.589V at Ib=5.00mA
VceSat=0.036V at Ic=5.0mA and Ib=1.00mA
IcLeak=0.000mA
Both RCA 40250 transistors tested good.
Both identified as NPN Silicon BJT.
Both use Red-B / Green-C / Blue-E pinout.
Zero collector leakage detected on both devices.
Sold as a tested pair.
Not gain matched (hFE 184 and hFE 49).
Ask the bench before you buy.
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