![]() ![]() To use the PNP transistor, you need to connect the base terminal to Ground potential to make the transistor operate in a saturation region, and to make it operate in cut off region, you need to provide voltage to the base pin. Continuous Collector current (IC): 200mA.It can be used in switching high voltage low current applications like inverter and converter circuits, and in Darlington Pair, etc. It has a gain of 110 to 300 but the maximum current that can flow through the collector pin is 200mA but to bias the base-collector junction, you need to provide 5mA current to the base terminal. It is very similar to BC557 PNP transistor but it has a higher collector to emitter voltage. Used for making siren or dual Led or Lamp flasher.ĢD dimensions will help you in placing this component at the time of making circuit on perf board or a PCB.2N3906 PNP General Purpose Transistor is a PNP transistor, not an NPN transistor, so it will be in saturation when the base is ground potential and it will allow the current to flow but when it provided some voltage, it will stop conducting.Used in inverter and converter circuits.It is used in the various switching applications.Optimal for loads with high peak voltage upto 40V.Used to switch high voltage low current loads.Also note that the load current should be less than 200mA (here 140ma) Note that for PNP transistors the loads should be connected in the collector side as shown below. If made high (5V) the motor will stop rotation. In the below circuit the base emitter voltage (VBE) is 0V (Grounded) hence the PNP transistor conducts and the motor rotates. So, from that you can find the value of resistance to be added in series with it. The maximum value of providing base current is 200mA. Where, the value of VBE will be 5v for this transistor. For finding the value of that resistor you can use the formula: ![]() For the protection of transistor a resistance added in series with it. If supply is provided to the base pin it stops conducting current between emitter and collector and said to be in OFF state. If we provide ground to the base pin then the transistor will be in reverse biased and said to be turn ON. 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. RCA AV (Audio video) Cables, Adapters & ConvertersĢN3906 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.Displayport (DP) Cables, Adapters & Converters. ![]()
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