IRF540N N-Channel MOSFET

IRF540N N-Channel MOSFET
IRF540N N-Channel MOSFET
N-Channel MOSFET IRF540N Pinout
IRF540N N-Channel MOSFET
N-Channel MOSFET IRF540N Pinout

click on image to enlarge

Pin Configuration:

Pin Number

Pin Name




Current flows out through Source



Controls the biasing of the MOSFET



Current flows in through Drain


  • Small signal N-Channel MOSFET
  • Continuous Drain Current (ID) is 33A at 25°C
  • Pulsed Drain Current (ID-peak) is 110A
  • Minimum Gate threshold voltage (VGS-th) is 2V
  • Maximum Gate threshold voltage (VGS-th) is 4V
  • Gate-Source Voltage is (VGS) is ±20V
  • Maximum Drain-Source Voltage (VDS)is 100V
  • Turn ON and Turn off time is 35ns each’
  • It is commonly used with Arduino, due to its low threshold current.
  • Available in To-220 package

Note: Complete Technical Details can be found at the IRF540N datasheet given at the end of this page.


IRF540N Equivalent:

RFP30N06, IRFZ44, 2N3055, IRF3205


Where to use IRF540N:

The IRF540N is an N-Channel Mosfet. This mosfet can drive loads upto 23A and can support peak current upto 110A. It also has a threshold voltage of 4V, which means it can easily driven by low voltages like 5V. Hence it is mostly used with Arduino and other microcontrollers for logic switching. Speed control of motors and Light dimmers are also possible with this Mosfet since it has good switching characteristics.

So if you are looking for a Mosfet to switch applications that consume high current with some logic level devices then this Mosfet will be a perfect choice for you.


How to use IRF540N:

Unlike transistors MOSFET’s are voltage controlled devices. Meaning, they can be turned on or turned off by supplying the required Gate threshold voltage (VGS). IRF540N is an N-channel MOSFET, so the Drain and Source pins will be left open when there is no voltage applied to the gate pin. When a gate voltage is applied these pins gets closed.

The below circuit shows how this mosfet behaves when the Gate voltage is applied (5V) and not applied (0V). Since this an N-Channel mosfet the load that has to be switched (in this case a motor) should always be connected above the drain pin.

Circuit using IRF540N N-Channel Mosfet

When you turn on a Mosfet by supplying the required voltage to the gate pin, it will remain on unless you supply 0V to the gate. To avoid this problem we should always use a pull-down resistor (R1), here I have used a value of 10k. In applications like controlling the speed of motor or dimming a light we would use a PWM signal for fast switching, during this scenario the MOSFET’s gate capacitance will create a reverse current due to parasitic effect. To tackle this we should use a current limiting capacitor, I have a used a value of 470 here.



  • Switching high power devices
  • Control speed of motors
  • LED dimmers or flashers
  • High Speed switching applications
  • Converters or Inverter circuits


2D model of the component:

If you are designing a PCB or Perf board with this component then the following picture from the 2N7000 Datasheet will be useful to know its package type and dimensions.

 IRF540N N-Channel Mosfet 2D-model


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