View bc817 datasheet:

BC817-25 BC817-40 ® SMALL SIGNAL NPN TRANSISTORS PRELIMINARY DATA Type Marking BC817-25 6B BC817-40 6C SILICON EPITAXIAL PLANAR NPN TRANSISTORS MINIATURE SOT-23 PLASTIC PACKAGE FOR SURFACE MOUNTING CIRCUITS TAPE AND REEL PACKING THE PNP COMPLEMENTARY TYPES ARE BC807-25 AND BC817-40 RESPECTIVELY SOT-23 APPLICATIONS WELL SUITABLE FOR PORTABLE EQUIPMENT SMALL LOAD SWITCH TRANSISTORS WITH HIGH GAIN AND LOW SATURATION VOLTAGE INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VCBO Collector-Base Voltage (IE = 0) 50 V V Collector-Emitter Voltage (I = 0) 45 V CEO B VEBO Emitter-Base Voltage (IC = 0) 5 V I Collector Current 0.5 A C ICM Collector Peak Current 1 A Ptot Total Dissipation at TC = 25 oC 250 mW o Tstg Storage Temperat