Download the MJW21194 datasheet PDF.
This datasheet also includes the MJW21193 variant, as both parts are published together in a single manufacturer document.
Silicon Power Transistors MJW21193 (PNP) MJW21194 (NPN)
The MJW21193 and MJW21194 utilize Perforated Emitter technology and are specifically designed for high power audio output, disk head positioners and linear applications.