BD135 - BD136 BD139 - BD140 Complementary low voltage transistor Features Products are pre-selected in DC current gain Application General purpose 1 2 3 Description SOT-32 These epitaxial planar transistors are mounted in the SOT-32 plastic package. They are designed for audio amplifiers and drivers utilizing complementary or quasi-complementary circuits. The NPN types are the BD135 and BD139, and Figure 1. Internal schematic diagram the complementary PNP types are the BD136 and BD140. NPN PNP Table 1. Device summary Order codes Marking Package Packaging BD135 BD135 BD135-16 BD135-16 BD136 BD136 BD136-16 BD136-16 BD139 BD139 SOT-32 Tube BD139-10 BD139-10 BD139-16 BD139-16 BD140 BD140 BD140-10 BD140-10 BD140-16 BD140-16 May 2008 Rev 5 1/9 www.st.com 9Contents BD135 - BD136 - BD139 - BD140 Contents 1 Electrical ratings 3 2 Electrical characteristics . 4 2.1 Electrical characteristics (curves) . 5 3 Package mechanical data . 6 4 Revision history 8 2/9