Motorola TIP31A NPN Silicon Power Transistor
$8.99
Original Motorola TIP31A NPN silicon power transistor in the popular TO-220 package. The TIP31A is a versatile general-purpose power transistor commonly found in audio equipment, power supplies, regulators, industrial controls, switching circuits, and educational electronics projects. This device has been professionally tested and verified functional with strong gain, excellent leakage performance, and solid saturation characteristics. An excellent choice for repairs, restoration work, experimentation, or component inventory.
HISTORICAL NOTE:
The Motorola TIP31 series became one of the most widely used TO-220 power transistor families in consumer, commercial, and industrial electronics. Known for reliability and versatility, TIP31 devices have been used for decades in amplifier, power supply, and switching applications worldwide.
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
Audio Amplifiers, Power Supplies, Voltage Regulators, Switching Circuits, Industrial Electronics, Educational Projects, Electronics Repair, Semiconductor Collection, General Purpose Power Applications
RF Boneyard Bench Notes
Tester Lead Mapping:
Red-B Green-C Blue-E
Bench Measurements:
NPN Silicon BJT
hFE=181 at Ic=5.01mA
Vbe=0.558V at Ib=1.00mA
Vbe=0.624V at Ib=5.00mA
VceSat=0.025V at Ic=5.0mA and Ib=1.00mA
IcLeak=0.000mA
PASS - Semiconductor analyzer testing completed successfully.
PASS - Strong gain measurement of hFE 181 recorded.
PASS - No measurable collector leakage detected.
PASS - Device exhibits normal silicon transistor characteristics.
Motorola TIP31A transistor tested good with excellent leakage performance and strong gain. Suitable for repair, restoration, experimentation, and replacement applications.
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