IRFZ44N N-Channel MOSFET

The IRFZ44N is an N-channel enhancement-mode power MOSFET intended for high-current switching and power-control applications. It is designed to provide low conduction losses and fast switching performance in circuits where efficient control of DC power is required.

Its 55V drain-to-source rating makes it suitable for many low-voltage power applications, while the ±20V gate-to-source voltage rating provides a useful operating margin for the MOSFET gate when appropriate gate-drive circuitry is used.

Features

• N-channel enhancement-mode power MOSFET
• 55V drain-to-source voltage rating
• ±20V gate-to-source voltage rating
• Low on-resistance for reduced conduction losses
• Fast switching performance
• Advanced power MOSFET process technology
• 175°C maximum junction temperature
• Dynamic dv/dt rating
• Avalanche-rated design
• Suitable for high-current switching applications
• TO-220 style through-hole package

Applications

• Automotive electronic circuits
• DC motor control
• PWM motor speed controllers
• DC power switching
• Battery-powered projects
• Inverters and power converters
• LED power switching
• Solenoid and relay control
• Robotics and automation projects
• DIY power electronics
• General-purpose switching circuits

How It Works / Use Guide

The IRFZ44N controls current flowing between its Drain (D) and Source (S) terminals according to the voltage applied between the Gate (G) and Source.

1. Identify the Gate, Drain, and Source pins before installation.
2. Connect the load in the appropriate position in the switching circuit.
3. Apply the required gate-drive voltage between Gate and Source.
4. A suitable gate voltage turns the MOSFET on, allowing current to flow through the Drain-Source path.
5. Removing or reducing the appropriate gate-drive signal turns the MOSFET off.
6. For PWM applications, use a suitable gate-driver or microcontroller interface and ensure the MOSFET is adequately driven.
7. Use a heatsink when power dissipation causes the device temperature to approach its allowable limit.

Important: The IRFZ44N is often used with microcontrollers, but its low on-resistance specifications are generally associated with a specified gate-drive voltage. A 5V logic signal should not automatically be assumed to provide the same low-loss performance as a properly specified higher gate-drive voltage.

Important Notes

• Do not exceed the ±20V Gate-to-Source voltage rating.
• Do not exceed the 55V Drain-to-Source voltage rating.
• The 175°C value is a maximum junction-temperature rating, not a recommended continuous operating temperature.
• Use a suitable heatsink when required by the application's current, voltage, switching frequency, and thermal conditions.
• Provide appropriate gate protection and a proper gate-drive circuit for reliable switching.
• When switching inductive loads such as motors, solenoids, or relays, use appropriate protection circuitry to control voltage spikes.
• Always verify the pin configuration and electrical specifications of the actual component before installation.

Package Includes

• 1 × IRFZ44N N-Channel MOSFET