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BUY49S SILICON NPN TRANSISTOR s SGS-THOMSON PREFERRED SALESTYPE s NPN TRANSISTOR s FAST SWITCHING SPEED s LOW COLLECTOR EMITTER SATURATION APPLICATIONS s GENERAL PURPOSE SWITCHING DESCRIPTION The BUY49S is a silicon epitaxial planar NPN transistor in jedec TO-39 package. It is used in high-current switching applications up to 3 A. TO-39 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit V CBO Collector-Base Voltage (IE = 0) 250 V V CEO Collector-Emitter Voltage (I B = 0) 200 V V EBO Emitter-Base Voltage (IC = 0) 6 V IC Collector Current 3 A I CM Collector Peak Current 5 A P tot Total Power Dissipation at T amb 25 o C 10 W o T stg Storage Temperature - 65 to 200 C o Tj Max Operating Junction Temperature 200 C June 1997 1/4 BUY49S THERMAL DATA o R thj-case Thermal Resistance Junction-case Max 15 C/W o R thj-amb Thermal Resistance Junction-case-ambient Max 175 C/W o ELECTRICAL CHARACTERISTICS (Tcase = 25 C unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit I CBO Collector Cut-off V CB = 200 V 0.1