IRFZ44N PDF – 55V, 49A, Power MOSFET

What is IRFZ44N?

This is a power MOSFET (Metal Oxide Semiconductor Field Effect Transistor) used in electronic circuits for switching and amplification applications. It is an N-channel MOSFET with a voltage rating of 55V and a current rating of 49A. The IRFZ44N has a low on-resistance of 17.5mOhm, which allows it to handle high power and reduce power loss. It is housed in a TO-220AB package, which provides good thermal dissipation and makes it easy to mount on a heatsink.

The Package is TO-220AB Type

The function of this semiconductor is 55V, 49A, Power MOSFET.

Manufacturer: International Rectifier

Image and pinout :




The IRFZ44N is 55V, 49A, Power MOSFET. Advanced HEXFET Power MOSFETs from International Rectifier utilize advanced processing techniques to achieve extremely low on-resistance per silicon area. This benefit, combined with the fast switching speed and ruggedized device design that HEXFET power MOSFETs are well known for, provides the designer with an extremely efficient and reliable device for use in a wide variety of applications. It is suitable for use in various electronic circuits, including power supplies, motor control circuits, and lighting applications.

The TO-220 package is universally preferred for all commercial-industrial applications at power dissipation levels to approximately 50 watts. The low thermal resistance and low package cost of the TO-220 contribute to its wide acceptance throughout the industry […]


0. Low on-resistance, which means it can handle high power and reduce power loss.

1. Advanced Process Technology

2. Ultra Low On-Resistance

3. Dynamic dv/dt Rating

4. 175°C Operating Temperature

5. Fast Switching

6. Fully Avalanche Rated



Q1: Can this MOSFET be used for motor control applications?
A1: Yes, It is suitable for use in motor control circuits. Its high current rating and low on-resistance make it well-suited for such applications.

Q1: Can the IRFZ44N be used in high-frequency switching applications?
A1: It has a relatively high gate capacitance, which can cause issues with high-frequency switching applications. It may not be the best choice for such applications.


IRFZ44N PDF Datasheet

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