Bipolar Transistors - BJT

Bipolar Transistors (BJTs) are in stock with same-day shipping at Mouser from leading manufacturers. Mouser is an authorized distributor for many bipolar transistor manufacturers, including Central Semiconductor, Diodes Incorporated, Microchip, Nexperia, onsemi, STMicroelectronics & more.

Bipolar Junction Transistors (BJTs) are semiconductor devices designed to amplify or switch electronic signals and power through the controlled movement of charge carriers across multiple semiconductor junctions. They provide precise current control, high gain characteristics, and reliable performance, making them essential components in both analog and digital circuit designs. These devices serve as fundamental building blocks in amplification, switching, signal conditioning, and power management applications across a wide range of electronic systems.

Types: The most common bipolar junction transistor types include NPN transistors, PNP transistors, small-signal transistors, power transistors, Darlington transistors, RF transistors, switching transistors, and complementary transistor pairs, each optimized for specific amplification, switching, frequency, and power-handling requirements.

Applications: Bipolar junction transistors are widely used in audio amplifiers, power supplies, industrial automation systems, communication equipment, motor control circuits, consumer electronics, automotive electronics, and signal processing applications to provide amplification and switching functions.

Selection requirements: To choose bipolar junction transistors, evaluate collector-emitter voltage, collector current rating, gain (hFE), power dissipation, switching speed, frequency performance, package type, thermal characteristics, and suitability for the intended electrical and environmental conditions.

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Please view our selection of bipolar transistors below.