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BUX48 BUX48A High voltage fast-switching NPN power transistors Features NPN transistors High voltage capability High current capability Fast switching speed Applications 1 2 Switching mode power supplies TO-3 Flyback and forward single transistor low power converters Figure 1. Internal schematic diagram Description The BUX48 and BUX48A are multi epitaxial mesa NPN transistors mounted in TO-3 metal can. They are intended for switching and industrial applications for single and three-phase mains. Table 1. Device summary Order code Marking Package Packaging BUX48 BUX48 TO-3 tray BUX48A BUX48A TO-3 November 2007 Rev 1 1/9 www.st.com 9 Absolute maximum ratings BUX48 BUX48A 1 Absolute maximum ratings Table 2. Absolute maximum ratings Value Unit Symbol Parameter BUX48 BUX48A Unit VCER Collector-emitter voltage (RBE = 10) 850 1000 V VCES Collector-emitter voltage (VBE = 0) 850 1000 V VCEO Collector-emitter voltage (IB = 0) 400 450 V VEBO Emitter-base voltage (IC = 0) 7 V IC Collector current 15 A ICM Collector peak current 30 A ICP Collector peak current non repetitive (tp < 20