View std13003 datasheet:

STD13003 � HIGH VOLTAGE FAST-SWITCHING NPN POWER TRANSISTOR REVERSE PINS OUT Vs STANDARD IPAK (TO-251) / DPAK (TO-252) PACKAGES MEDIUM VOLTAGE CAPABILITY LOW SPREAD OF DYNAMIC PARAMETERS MINIMUM LOT-TO-LOT SPREAD FOR RELIABLE OPERATION VERY HIGH SWITCHING SPEED 1 1 SURFACE-MOUNTING DPAK (TO-252) 2 3 3 POWER PACKAGE IN TAPE & REEL (Suffix "T4") THROUGH-HOLE IPAK (TO-251) POWER IPAK DPAK PACKAGE IN TUBE (Suffix "-1") TO-251 TO-252 (Suffix "-1") (Suffix "T4") APPLICATIONS: ELECTRONIC BALLASTS FOR FLUORESCENT LIGHTING SWITCH MODE POWER SUPPLIES DESCRIPTION INTERNAL SCHEMATIC DIAGRAM The device is manufactured using high voltage Multi Epitaxial Planar technology for high switching speeds and medium voltage capability. It uses a Cellular Emitter stru