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IRF540N MOSFET Specifications, Datasheet Explained

IRF540N MOSFET Specifications, Datasheet Explained

The IRF540N is an advanced HEXFET N-channel power mosfet, from International Rectifier. The device is extremely versatile with its performance capabilities and thus becomes ideal for numerous electronic applications.

The datasheet and pinout details of the device has been explained in the following article.

Main Features:

  1. Sophisticated, cutting-edge processing technology used.
  2. Extremely low resistance across load path.Flexible dv/dt plot.
  3. Operating temperature tolerance capacity as high as 175 degrees Celsius.
  4. Very fast switching capability.
  5. Fully resistant against avalanche or peak surge currents.

Pinout Image

Maximum tolerable limits of IRF540N) are stated as under:

ID = 33 Amps Max at 10V (VGS), It’s the maximum current handling capacity of the device across the drain to the source, via the load, with gate voltage at 10V, at normal temperatures (25 to 35 degrees Cel.)

IDM = 110 Amps Max, It’s the maximum current handling capacity of the device across the drain to the source, via the load, in a pulsed mode (NOT continuous).

PD = 130 Watts Max, The maximum power the FET can dissipate with and infinite (cool) heat sink

VGS = 10 Volts typical +/-20%. It’s the maximum trigger voltage that may be applied across the gate and the source for optimal performance.

V(BR)DSS= 100 volts, It’s the maximum voltage that may be applied across drain to source of the device.

Applications Areas

This device is best suited for high power DC switching applications, such as in high current SMPS power supplies, compact ferrite inverter circuits, iron core inverter circuits, buck and boost converters, power amplifiers, motor sped controllers, robotics etc.

How to Connect IRF540N MOSFET

It’s quite simple, and must be done as explained in the following points:

The source should be preferably connected to the ground or the negative line of the supply.

The drain should be connected to the positive terminal of the supply via the load which needs to be operated by the device.

Finally, the gate which is the trigger lead of the device should be connected to the trigger point of the circuit, this trigger input should be preferably a +5V supply from a CMOS logic source.

If the trigger input is not a logic source make sure the gate is permanently connected to ground via a high value resistor.

When the device is being used for switching inductive loads like a transformer or a motor, a flyback diode should be normally connected across the load, with the cathode of the diode connected to the positive side of the load.

However, the IRF540N has a built in avalanche protective diode, therefore typically an external diode may not be required; it may be incorporated in case yu wish to provide extra safety to the device.

Corrections to the above explanations is welcome.


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11 thoughts on “IRF540N MOSFET Specifications, Datasheet Explained”

  1. Thanks sir, please how many watt 33amp is equal to, am guessing 330w right? What am trying to understand is how many Watt’s is irf540?

    • Andrew, multiply the Vds and Id ratings of the mosfet, that will give you the maximum wattage handling capacity of the mosfet, provided its temperate is not allowed to 60 degrees Celsius through proper heatsink.

  2. Dear Sir
    We need a MOSFET with following specifications to be used in High voltage inverter circuit
    a) Vds:500v
    b) ID: 50Amps continuous
    c) Fast Switching
    d) upto 175 degree Celsius

  3. Sir is there anything wrong with connecting two or three irf3205 fet in parallel in an inverter that is supposed to work on 12v 36amp battery? If yes suggest the mosfet and the number to connect in parallel as i only want 300watt at the output and (2) how can i know a 350va transformer by just physically looking at it.

    • victory, single IRF3205 mosfets would be enough for achieving the required 300 watts…more in parallel won't be required, just put these on good heatsinks.

      you can expect a 350vA trafo to be minimum 8 to 12kg heavy

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