PNP Power Transistors, STMicroelectronicsThe STMicroelectronics BD438 are silicon epitaxial-base NPN power transistor in Jedec SOT-32 plastic package, intended for use in medium power linear and switching applications. It is especially suitable for use in car-radio output stages. The complementary PNP types are BD434, BD436, and BD438 respectively.Preferred sales typeComplementary PNP - NPN devicesBipolar Transistors, STMicroelectronicsA broad range of NPN and PNP Bipolar Transistors from STMicroelectronics including General Purpose, Darlington, Power and High-Voltage devices in both SMT and Through-hole packages.