BU505

BU505 High Voltage NPN Multiepitaxial Fast-Switching Transistor Features ■ HIGH VOLTAGE CAPABILITY ■ VERY HIGH SWITCHING SPEED ■ HIGH RUGGEDNESS Applications ■ ELECTRONIC BALLASTS FOR FLUORESCENT LIGHTING ■ SWITCH MODE POWER SUPPLIES Description The BU505 is a High Voltage NPN fastswitching transistor designed to be used in lighting application, like electronic ballast for fluorescent lamps. It’s characteristics make also ideal for power supplies. 3 2 1 TO-220 Internal Schematic Diagram Order Codes Part Number BU505 Marking BU505 Package TO-220 Packing TUBE August 2005 rev.4 1/10 www.st.com 10 1 Absolute Maximum Ratings 1 Absolute Maximum Ratings Table 1. Absolute Maximum Rating Symbol Parameter VCES VCEO IC ICM IB IBM PTOT TSTG TJ Collector-Emitter Voltage (VBE = 0) Collector-Emitter Voltage (IB = 0) Collector Current Collector Peak Current (tP < 5ms) Base Current Base Peak Current (tP < 5ms) Total dissipation at Tc = 25°C Storage Temperature Max. Operatin...