The 2N3906 is a widely used PNP bipolar junction transistor designed for general purpose low power amplifying or switching applications. It is designed for low electric current and power and medium voltage and can operate at moderately high speeds.
2N3906 is made in a TO-92 plastic case . When viewed from the flat side with the leads pointing down, the three leads coming out of the transistor, from left to right, are the leads for the emitter, base, and collector.
2N3906 designed to collector current 200 mA , the collector-base and collector-emitter 40 B for power dissipation of 300 mW . Its transition frequency F t is 250 MHz , with a beta of at least 100.
The complementary npn transistor with 2N3906 is the 2N3904 . Both types were registered by Motorola Semiconductor in the mid-1960s.
The 2N3904 (NPN) and 2N3906 (PNP) are complementary pairs of transistors. These transistors are available in TO-92, SOT23, SOT223 package styles with different prefixes.