View bd135--39 datasheet:

BD135 BD137/BD139 NPN SILICON TRANSISTORS SGS-THOMSON PREFERRED SALESTYPES DESCRIPTION The BD135, BD137 and BD139 are silicon epitaxial planar NPN transistors in Jedec SOT-32 plastic package, designed for audio amplifiers and drivers utilizing complementary or quasi compementary circuits. The complementary PNP types are the BD136 1 2 BD138 and BD140. 3 SOT-32 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit BD135 BD137 BD139 VCBO Collector-Base Voltage (IE = 0) 456080 V V Collector-Emitter Voltage (I = 0) 456080 V CEO B VEBO Emitter-Base Voltage (IC = 0) 5 V I Collector Current 1.5 A C I Collector Peak Current 3 A CM IB Base Current 0.5 A o P Total Dissipation at T ? 25 C12.5 W tot c o Ptot Total Dissipation at Tamb ? 25 C1.2