IRFZ44N N-Channel Power MOSFET

The IRFZ44N is a N-channel MOSFET produced by International Rectifier.  It is intended for use in a variety of applications, such as power supplies, battery management systems, and motor control circuits.  The datasheet for the IRFZ44N provides comprehensive information on its electrical and thermal properties, as well as its pin configuration and recommended operating conditions.


IRFZ44N Pinout Configuration

Pin Number

Pin Name




Controls the biasing of the MOSFET



Current flows in through Drain



Current flows out through Source


Features and Specifications

  • Small signal N-Channel MOSFET

  • Continuous Drain Current (ID) is 49A at 25°C

  • Pulsed Drain Current (ID-peak) is 160A

  • Minimum Gate threshold voltage (VGS-th) is 2V

  • Maximum Gate threshold voltage (VGS-th) is 4V

  • Gate-Source Voltage is (VGS) is ±20V (max)

  • Maximum Drain-Source Voltage (VDS) is 55V

  • Rise time and fall time is about 60ns and 45ns respectively.

  • It is commonly used with Arduino, due to its low threshold current.

  • Available in To-220 package


Note: Complete Technical Details can be found in the IRFZ44N datasheet given at the end of this page.


Alternatives for IRFZ44N

IRF2807, IRFB3207, IRFB4710

threshold voltage of 1.5V typical and 2V maximum, making it suitable for use with microcontrollers and other low voltage systems.  

On the other hand, the IRFZ44N has a higher threshold voltage of 2V minimum and 4V maximum, and is better suited for use in high power applications.

Another key difference between the two MOSFETs is their packaging.  The IRLZ44N is available in a small SMD package, 

while the IRFZ44N is available in a larger TO-220 package.  The IRLZ44N is also designed for use in low power applications, with a maximum drain current of 28A,

while the IRFZ44N is designed for high power applications, with a maximum drain current of 49A.

In summary, the IRLZ44N is a logic level MOSFET with a low threshold voltage, designed for use in low power applications, 

while the IRFZ44N is a high power MOSFET with a higher threshold voltage, designed for use in high power applications.  

It’s important to choose the correct MOSFET for your specific application to ensure proper functionality and avoid damage to the component.


As you can see the MOSFET opens completely only when the gate voltage is around 10V. If it is somewhere around 5V then the drain current is limited to 20A and so on.



  • Switching high power devices

  • Control speed of motors

  • LED dimmers or flashers

  • High Speed switching applications

  • Converters or Inverter circuits


2D Model and Dimensions

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

IRFZ44N MOSFET Dimensions