Transistors

Transistors are in stock with same-day shipping at Mouser from industry leading manufacturers. Mouser is an authorized distributor for many transistor manufacturers including Diodes Inc., Infineon, IXYS, Nexperia, onsemi, ROHM, STMicroelectronics, Texas Instruments, Toshiba, Vishay & more. You can buy many types of transistors at Mouser including, Bipolar transistors, Darlington transistors, MOSFETs, RF transistors, JFETs & more.

Transistors are semiconductor devices used to amplify or switch electronic signals, forming the fundamental building blocks of modern electronic circuits. They operate by controlling current flow between terminals (such as base, collector, and emitter in BJTs or gate, drain, and source in MOSFETs) to regulate voltage and signal behavior. Transistors are widely used due to their fast switching speeds, reliability, and ability to operate in both analog and digital applications.

Types: The most common transistor types include bipolar junction transistors (BJTs), MOSFETs, IGBTs, JFETs, RF transistors, Darlington transistors, and phototransistors, each optimized for specific amplification, switching, frequency, or power-handling requirements.

Applications: Transistors are commonly used in amplifiers, switching circuits, power regulation systems, signal processing, microprocessors, and communication devices.

Selection requirements: Choosing a transistor requires evaluating type (BJT or MOSFET), voltage and current ratings, power dissipation, switching speed, gain characteristics, and package type to ensure it meets the performance and thermal requirements of the application.

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Please view our large selection of transistors below.