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BD136 Medium Power PNP Transistor

BD136 Pin Configuration

Pin Number

Pin Name




Current Drains out through emitter, normally connected to ground



Current flows in through collector, normally connected to load



Controls the biasing of transistor, Used to turn ON or OFF the transistor.



  • Plastic casing PNP Transistor
  • High DC Current Gain (hFE), typically 80 when IC=10mA
  • Continuous Collector current (IC) is 1.5A
  • Collector-Emitter voltage (VCE) is 45 V
  • Collector-Base voltage (VCB) is 45V
  • Emitter Base Breakdown Voltage (VBE) is 5V
  • DC current gain (hfe) is 40 to 250
  • Available in To-225 package


Note: Complete Technical Details can be found at the BD136 transistor datasheet given at the end of this page.


BD136 Equivalent Transistor



Other PNP Transistors

BC157, BC556, 2N3906, 2SA1943, BD140, S8550, TIP127, TIP42


Brief Description on BD136 Transistor

BD136 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. This is where a PNP transistor differs from a NPN transistor, if you are looking for an equivalent NPN type check out BD135 transistor.

BD136 has a gain value of 40 to 250, this value determines the amplification capacity of the transistor. The maximum amount of current that could flow through the Collector pin is 1.5A, hence we cannot connect loads that consume more than 1.5A using this transistor. To bias a transistor we have to supply current to base pin, this current (IB) should be limited to 5mA and voltage across the base emitter pin should be 5V.

When this transistor is fully biased then it can allow a maximum of 1.5A to flow across the collector and emitter. This stage is called Saturation Region and the typical voltage allowed across the Collector-Emitter (V­CE) or Base-Emitter (VBE) could be 45V and 45V respectively. 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 500 mV.


Where to use BD136 Transistor

The BD136 is a medium power PNP transistor. It can be used to control heavy loads since it has a high collector current value of 1.5A. Another peculiar fact about this transistor is that it comes in plastic package, while most medium power transistor are available only in metal can package. This reduces the cost of the Transistor and also since the package is not conductive it will not be affected by other noise in the circuit. Due to this feature this transistor is widely used in amplifier applications.

So if you are looking for a medium power PNP transistor in Plastic package, then this Transistor might be the right choice for you.



  • Switching circuits
  • Amplification circuits
  • Audio amplifiers
  • Load driver circuits


2D-Model (TO-225)

BD136 Transistor Dimensions

Component Datasheet

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