The ON Semiconductor KSA992FTA is a PNP bipolar junction transistor designed for audio frequency low-noise amplifier applications. It features a 120V collector-emitter voltage and 50mA collector current.
The ON Semiconductor KSP44BU is an NPN Epitaxial Silicon Transistor designed for high-voltage applications. It features a 400V collector-emitter voltage and a 300mA collector current.