BC817-40

This NPN bipolar transistor is housed in a SOT-23 surface-mount package and is rated for 45 V collector-emitter voltage and 800 mA DC collector current. It dissipates up to 0.310 W and supports a maximum junction temperature of 150 °C. The device provides DC current gain of 400 at VCE = 1 V and IC = 100 mA, with 700 mV collector-emitter saturation voltage at IC = 500 mA and IB = 50 mA. Gain-bandwidth product is 100 MHz under the stated test conditions, and the manufacturer classifies it as Industrial Grade.