SGS 6251-1 Vintage TO-3 NPN Silicon Power Transistor
$19.99
Original SGS 6251-1 NPN silicon power transistor housed in the rugged TO-3 metal can package. Manufactured by SGS in Italy, this vintage power transistor has been professionally tested and verified functional with no measurable collector leakage. Suitable for vintage electronics restoration, industrial controls, power supplies, communications equipment, amplifier circuits, and semiconductor collections. The TO-3 package was widely used where reliable power handling and efficient heat dissipation were required.
Historical Note:
SGS (Società Generale Semiconduttori) was a major European semiconductor manufacturer and later became part of SGS-ATES, eventually evolving into STMicroelectronics. During the 1970s and 1980s, SGS produced a wide range of power semiconductors in Italy for industrial, commercial, telecommunications, and consumer electronic equipment. Vintage SGS devices remain desirable for restoration and historical semiconductor collections.
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, Industrial Controls, Power Supplies, Communications Equipment, Audio Amplifiers, Test Equipment Repair, Semiconductor Collection, Power Switching Applications, Electronics Experimentation
RF Boneyard Bench Notes
Tester Lead Mapping:
Red-B Green-C Blue-E
Bench Measurements:
NPN Silicon BJT
hFE=17 at Ic=5.00mA
Vbe=0.526V at Ib=1.00mA
Vbe=0.572V at Ib=5.00mA
VceSat=0.107V 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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