View st13005n datasheet:

ST13005N ® HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR MEDIUM VOLTAGE CAPABILITY NPN TRANSISTOR LOW SPREAD OF DYNAMIC PARAMETERS MINIMUM LOT-TO-LOT SPREAD FOR RELIABLE OPERATION VERY HIGH SWITCHING SPEED APPLICATIONS: COMPACT FLUORESCENT LAMP (CFL) 3 2 ELECTRONIC BALLASTS FOR 1 FLUORESCENT LIGHTING SWITCH MODE POWER SUPPLIES TO-220 DESCRIPTION The device is manufactured using high voltage Multi Epitaxial Planar technology for high switching speeds and medium voltage capability. It uses a Cellular Emitter structure with planar edge termination to enhance switching speeds INTERNAL SCHEMATIC DIAGRAM while maintaining a satisfactory RBSOA. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V Collector-Emitter Voltage (V = 0) 700 V CES BE V Colle