BU505| Datasheet

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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 TO-220
1

3 2

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.

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

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BU505 DATASHEET