EVVO Semi Single Bipolar Transistors 2SA2121

2SA2121 is a PNP silicon power transistor paired with 2SC5949 for high-fidelity audio amplifier output stages, rated for 15 A collector current and 200 V collector-emitter voltage. It is packaged in a TO-3PL case with dimensions of 20.0 mm length, 18.0 mm width, and 26.0 mm.height, and features a thermal resistance from junction to case of 0.35 °C/W. The transistor has a transition frequency exceeding 20 MHz, collector-emitter saturation voltage between 1.5 V and 3.0 V, and current gain ranging from 35 to 160 under specified conditions. It operates within a junction temperature range up to 150 °C and meets standard power transistor reliability requirements for high-temperature and high-current applications.