2N3553 - Silicon planar epitaxial overlay transistor
The device is a silicon NPN overlay transistor in a TO-39 metal package with the collector connected to the case.
DESCRIPTION emitter 1 2 MBB199 3 Fig.1 Simplified outline.
QUICK REFERENCE DATA SYMBOL VCEX VCEO ICM Ptot Tj fT PARAMETER collector-emitter voltage collector-emitter voltage peak co