Silicon Transistor Corp. 2N4348 NPN TO-3 Power Transistor Vintage Semiconductor
$19.95
Vintage Silicon Transistor Corp. 2N4348 NPN power transistor in a classic TO-3 metal-can package. This legacy high-voltage power transistor was used in older industrial electronics, regulated power supplies, amplifier circuits, motor-control systems, and OEM equipment where rugged TO-3 semiconductors were required.
This part is ideal for technicians, restorers, and collectors maintaining period-correct equipment where original vintage semiconductors are preferred.The 2N4348 could be found in some vintage stereo equipment, especially from the late 1960s through the 1970s.
Examples include:
Stereo receivers
Integrated amplifiers
Power amplifiers
Professional PA amplifiers
Console stereos
Reel-to-reel tape equipment
Studio audio gear
Manufacturers from that era often used TO-3 power transistors in the output stages or power supply sections, including companies like:
Pioneer
Sansui
Kenwood
Marantz
Harman Kardon
Sherwood
Compatible Radios / Boards
Industrial Power Supplies
Regulated DC power supplies
Industrial bench supplies
OEM power-control systems
Process-control equipment
Test Equipment
Oscilloscopes
Signal generators
Frequency counters
Laboratory instrumentation
Industrial measurement equipment
Audio Equipment
Vintage solid-state power amplifiers
Commercial PA amplifiers
Broadcast audio systems
High-power audio output stages
Industrial Controls
Motor-control drives
Conveyor systems
Factory automation equipment
Relay driver systems
Industrial regulator boards
Telecommunications Equipment
Telephone switching systems
Carrier power supplies
Base-station support equipment
Communications infrastructure hardware
OEM Electronics
Elevator controllers
HVAC control systems
Medical equipment power sections
Backup power systems
Military and aerospace support electronics
What Makes This One Interesting
The 2N4348 was designed as a high-voltage transistor (around 180V class). That means it was often used where ordinary lower-voltage TO-3 transistors wouldn't survive.
With your test results:
hFE = 31
VCE(sat) = 0.033 V
ICLeak = 0.000 mA
RF Boneyard Bench Notes
DCA75 tested as NPN BJT. hFE 31 at IC 5.02 mA. VBE 0.450 V at IB 1.00 mA and 0.527 V at IB 5.00 mA. VCE(sat) 0.033 V at IC 5.00 mA / IB 1.00 mA. IC leakage 0.000 mA. RShunt 35,000 ?.
Bench Result: Strong PASS.
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