The DTC143TKA Digital Transistor NPN 100mA 50V SOT-23 RoHS manufactured by Blue Rocket is a small surface-mount transistor. It has a maximum of 100mA continuous collector current and a maximum of 50V collector-emitter voltage. It is designed for use in digital circuits, such as switching and amplifier applications. The RoHS label indicates that the device is compliant with the European Union's Restriction of Hazardous Substances (RoHS) standards, which means it does not contain any lead or other hazardous substances. The DTC143TKA comes in a SOT-23 small package, for easy handling and integration into tight areas.