The BGY588N is a NPN silicon planar epitaxial transistor module from Philips. It is designed for use in high voltage switching applications. Features: High voltage switching capability Low saturation voltage Low collector-emitter saturation voltage High current gain Low collector-emitter saturation voltage Low noise High power dissipation Applications: High voltage switching Motor control Lighting control Power supplies Automotive applications(For reference only)
https://www.utsource.net/itm/p/297828.html