RCA 2027-5749B Vintage TO-3 NPN Silicon Power Transistor
$19.99
Original RCA 2027-5749B NPN silicon power transistor housed in the classic TO-3 metal can package. This vintage RCA device has been professionally tested and verified functional with no measurable collector leakage and solid power transistor characteristics. Suitable for vintage electronics restoration, industrial equipment repair, communications equipment, power supplies, amplifier circuits, and semiconductor collections. The rugged TO-3 package was widely used in commercial, industrial, and communications equipment where reliability and heat dissipation were important design requirements.
Historical Note:
RCA was one of the largest American semiconductor manufacturers during the 1960s, 1970s, and 1980s. Many RCA TO-3 power transistors were supplied to OEM equipment manufacturers under house-number markings such as this device. These transistors commonly appeared in power supplies, industrial controls, communications equipment, and consumer electronics where long service life was required.
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 Electronics Restoration, Power Supplies, Industrial Controls, Communications Equipment, Audio Amplifiers, Test Equipment Repair, Semiconductor Collection, Power Switching Applications, Electronics Experimentation
RF Boneyard Bench Notes
Tester Lead Mapping:
Red-C Green-E Blue-B
Bench Measurements:
NPN Silicon BJT
hFE=13 at Ic=5.01mA
Vbe=0.452V at Ib=1.00mA
Vbe=0.511V at Ib=5.00mA
VceSat=0.053V at Ic=5.0mA and Ib=1.00mA
IcLeak=0.000mA
Bench Evaluation:
PASS - Semiconductor analyzer testing completed successfully.
PASS - No measurable collector leakage detected.
PASS - Junction characteristics consistent with a functional silicon power transistor.
PASS - Suitable for restoration, repair, substitution research, and collector inventory.
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