![]() In PNP transistor, by default it’s in ON state, but not to be said perfectly ON until the base pin is not grounded. When used as a switch, it can be operated in saturation region and cut-off region. The 2N3906 transistor is commonly used as a switching device. So if you looking for a PNP transistor that could switch high voltage loads within 0.2A then this 2N3906 transistor might be the right choice for you. This transistor has only a gain value of 300, hence not suitable for amplifier circuits. It very much similar to the bc557 transistor except for that it has high collector to emitter voltage and hence high voltage loads can be toggled. The 2N3906 is a commonly used PNP transistor. When base current is removed the transistor becomes fully off, this stage is called as the Cut-off Region and the Base Emitter voltage could be around 5V. This stage is called Saturation Region and the typical voltage allowed across the Collector-Emitter (VCE) or Base-Emitter (VBE) could be 40 and 5 V respectively. When this transistor is fully biased then it can allow a maximum of 200mA to flow across the collector and emitter. To bias a transistor we have to supply current to base pin, this current (IB) should be limited to 5mA. The maximum amount of current that could flow through the Collector pin is 200mA, hence we cannot connect loads that consume more than 200mA using this transistor. This is where a PNP transistor differs from a NPN transistor, a Logic state (blue colour) is used to toggle between Ground and Signal Voltage (Emitter-Base Voltage VBE) as shown belowĢN3906 has a gain value of 110 to 300, this value determines the amplification capacity of the transistor. Note: Complete Technical Details can be found at the 2N3906 datasheet given at the end of this page.īC157, BC558, 2SA1943, BD140, S8550, TIP127, TIP42ĢN3906 is a PNP transistor hence the collector and emitter will be closed (Forward biased) when the base pin is held at ground and will be opened (Reverse biased) when a signal is provided to base pin. Continuous Collector current (IC) is 200mA.These transistors are available in TO-92, SOT23, SOT223 package styles with different prefixes. The 2N3904 (NPN) and 2N3906 (PNP) are complementary pairs of transistors. Both types were registered by Motorola Semiconductor in the mid-1960s. The complementary npn transistor with 2N3906 is the 2N3904. Its transition frequency F t is 250 MHz, with a beta of at least 100. 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.ĢN3906 designed to collector current 200 mA, the collector-base and collector-emitter 40 B for power dissipation of 300 mW. 2n3906 pinoutĢN3906 is made in a TO-92 plastic case. ![]() It is designed for low electric current and power and medium voltage and can operate at moderately high speeds. The 2N3906 is a widely used PNP bipolar junction transistor designed for general purpose low power amplifying or switching applications. Humidity Sensors/Temperature and Humidity Sensors.Photointerrupters - Slot Type - Transistor Output.Photointerrupters - Slot Type - Logic Output.Board-to Board/Wire-to-Board Connectors.Ethernet Connectors/Modular Connectors (RJ45 RJ11).Solar Connectors / Photovoltaic Connectors.Modular Connectors / Ethernet Connectors.
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