View bc557b datasheet:

BC557B ® SMALL SIGNAL PNP TRANSISTOR Ordering Code Marking Package / Shipment BC557B BC557B TO-92 / Bulk BC557B-AP BC557B TO-92 / Ammopack SILICON EPITAXIAL PLANAR PNP TRANSISTOR TO-92 PACKAGE SUITABLE FOR THROUGH-HOLE PCB ASSEMBLY THE NPN COMPLEMENTARY TYPE IS BC547B TO-92 TO-92 Bulk Ammopack APPLICATIONS WELL SUITABLE FOR TV AND HOME APPLIANCE EQUIPMENT SMALL LOAD SWITCH TRANSISTOR 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 VCEO Collector-Emitter Voltage (IB = 0) -45 V V Emitter-Base Voltage (I = 0) -5 V EBO C I Collector Current -100 mA C ICM Collector Peak Current (tp < 5 ms) -200 mA Ptot Total Dissipation at TC = 25 oC 500 mW o