TIP122 is a compound tube made up of two transistors, which has the function of adjustment in the circuit. Generally, the amplification factor is large, which can reduce the interference factors in the circuit. Scope of application: equipment power adjustment circuit, motor control adjustment circuit, electromagnetic valve control circuit, equipment control board, soybean milk machine, power supply of power amplifier. 100% brand new and high quality. Material: copper, silicon chip. Color:Black. Specification: Product name: TIP122 Packaging: the TO - 220 Polarity: NPN : 100 v voltage Power consumption, Pd: 65 w Collector dc current :5A Dc current gain hFE:1000 Type of transistor: power Quantity: 10 PCS Weight: 16 g Package Includes: 10 Pieces Transistor(2 Pack) : Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.