The ZTX851STZ with Diodes Incorporated Bipolar Transistors - BJT NPN Big Chip SELine is a widely used transistor that is designed for a wide range of applications. It is manufactured by Diodes Incorporated, a leading semiconductor provider specializing in power, analog, and mixed signal products. The ZTX851STZ features an NPN BJT structure with low power dissipation, high current gain, and high speed switching. It is offered in a TO-5 or SMD package with a built-in ESD protection diode and built-in thermal protection. The device is suitable for use in amplifiers, switches, and other general purpose applications. The ZTX851STZ can handle up to 115V collector-emitter voltage, 50mA collector current, and 300mW power dissipation.