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IRF740 N-Channel Power Mosfet

The IRF740 is an N-Channel Power MOSFET which can switch loads upto 400V.


Pin Configuration

Pin Number

Pin Name




Current flows out through Source (maximum 10A)



Controls the biasing of the MOSFET (Threshold voltage 10V)



Current flows in through Drain



·         N-Channel Power MOSFET

·         Continuous Drain Current (ID): 10A

·         Gate threshold voltage (VGS-th) is 10V (limit = ±20V)

·         Drain to Source Breakdown Voltage: 400V

·         Drain Source Resistance (RDS) is 0.55 Ohms

·         Rise time and fall time is 27nS and 24nS

·         Available in To-220 package


Note: Complete technical details can be found at the IRF740 datasheet linked at the bottom of the page


Alternatives for IRF740

IRFB13N50A, UF450A, SSF13N15


Other N-channel MOSFETS

BSS138, IRF520, 2N7002, BS170, BSS123, IRF3205, IRF1010E



The IRF740 is an N-Channel Power MOSFET which can switch loads upto 400V. The Mosfet could switch loads that consume upto 10A, it can turned on by provide a gate threshold voltage of 10V across the Gate and Source pin. Since the mosfet is for switching high current high voltage loads it has a relatively high gate voltage, hence cannot be used directly with a I/O pin of a CPU. If you prefer a mosfet with low gate voltage then try IRF540N or 2N7002 etc.

One considerable disadvantage of the IRF740 Mosfet is its high on-resistance (RDS) value which is about 0.55 ohms. Hence this mosfet cannot be used in applications where high switching efficiency is required. The Mosfet requires a driver circuit to provide 10V to the gate pin of this Mosfet the simplest driver circuit can be build using a transistor. It is relatively cheap and has very low thermal resistance, added to this the mosfet also has good switching speeds and hence can be used in DC-DC converter circuits.



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


2D model of the component

If you are designing a PCB or Perf board with this component then the following picture from the IRF740 Datasheet will be useful to know its package type and dimensions.

 IRF740 N-Channel Power Mosfet 2-D Model


Component Datasheet

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