Transistors act as an amplifier as well as a switch and are critical for a number of applications and electronic devices to work properly. Amplify or switch electronic signals reliably by choosing the right one from a wide assortment of semiconductor transistors available at PartsMine. Turn small input current into larger ones, conveniently, with these premium quality, branded transistors. Besides the unipolar, field-effect transistors, the range also includes bipolar transistors (also called bipolar junction transistors or BJTs) used in high-voltage switches, heavy current applications, and radio-frequency amplification. Power transistors, which are used to control voltage-current rating and manage different power levels, are also available. Choose from brands like Allegro MicroSystems, Motorola, National Semiconductor, Texas Instruments, Fairchild Semiconductor, etc. Your order ships quick with an estimated delivery time of 3 business days or less. Shop for the right semiconductor transistors now.