The SavantIC Semiconductor Product Specification document provides information about the 2SD718 silicon NPN power transistor. The transistor is in a TO-3P(I) package and is recommended for 45-50W audio frequency amplifier output stage applications. It has absolute maximum ratings of 120V for collector-base voltage and collector-emitter voltage. Typical characteristics include a current gain of 55-160 at 1A collector current and 5V collector-emitter voltage.