The DTC143ECA is a NPN bipolar junction transistor (BJT), BRT marking, with a maximum voltage rating of 50V, a current rating of 0.1A and a power dissipation rating of 200mW in a SOT-23 package. It includes a resistor R1 having a value of 4.7kO and is manufactured by Luguang. This transistor provides high current gain, high breakdown voltage, and low noise. It is suitable for a variety of applications including driver stages, signal switching, general purpose amplification, and digital circuits.