IRFZ44N N-Channel Power MOSFET 49A 55V TO-220

The IRFZ44N N-Channel Power MOSFET is a high-efficiency power transistor designed for fast switching and high-current applications. Featuring a 55V Drain-to-Source Voltage (VDS) rating and a 49A Continuous Drain Current (ID) capability, this MOSFET is widely used in motor drivers, power supplies, battery management systems, inverters, LED dimmers, robotics, and microcontroller-based switching circuits.

The IRFZ44N utilizes N-Channel Enhancement Mode technology, offering low ON-state resistance and excellent switching performance. Its rugged TO-220 package ensures effective heat dissipation, making it suitable for both hobbyist and industrial power control applications.

Key Features

• N-Channel Enhancement Mode MOSFET
• High Current Capacity: Up to 49A
• Drain-to-Source Voltage Rating: 55V
• Low ON-State Resistance for efficient operation
• Fast Switching Performance
• High Power Dissipation Capability
• Suitable for PWM and switching applications
• Robust TO-220 Through-Hole Package
• Easy interfacing with Arduino, ESP32, STM32, and Raspberry Pi projects
• Ideal for motor control and power management systems

Technical Specifications

• Product Type: Power MOSFET
• Model: IRFZ44N
• MOSFET Type: N-Channel Enhancement Mode
• Package Type: TO-220
• Drain-to-Source Voltage (VDS): 55V
• Continuous Drain Current (ID): 49A
• Pulsed Drain Current (IDM): Up to 160A
• Gate-to-Source Voltage (VGS): ±20V
• Drain-Source ON Resistance (RDS(on)): Typically 0.0175Ω
• Power Dissipation (PD): Up to 94W
• Rise Time: Fast Switching Characteristics
• Mounting Type: Through-Hole
• Operating Temperature Range: -55°C to +175°C

Pin Configuration

The IRFZ44N consists of three terminals:

• Gate (G) – Controls switching operation
• Drain (D) – Connects to the load
• Source (S) – Connects to ground or return path

TO-220 Front View

• Pin 1: Gate
• Pin 2: Drain
• Pin 3: Source

Note: The metal mounting tab is electrically connected to the Drain terminal.

Working Principle

The IRFZ44N functions as a voltage-controlled electronic switch. When a sufficient voltage is applied between the Gate and Source terminals, the MOSFET turns ON and allows current to flow from Drain to Source. Removing the gate voltage turns the MOSFET OFF, stopping current flow.

Its low RDS(on) minimizes power losses, making it highly efficient for switching and power control applications.

Applications

• DC Motor Drivers
• PWM Motor Speed Controllers
• Arduino and ESP32 Power Switching
• LED Dimmers and Lighting Control
• Battery Management Systems (BMS)
• Solar Power Projects
• Switching Power Supplies (SMPS)
• Inverter Circuits
• Robotics and Automation Projects
• High-Current Electronic Switching

Advantages

• High current handling capability
• Low conduction losses
• Fast switching speed
• High efficiency operation
• Easy microcontroller interfacing
• Durable TO-220 package
• Suitable for both hobby and industrial applications

Usage Tips

• Use a heatsink for high-current applications.
• Add a gate resistor to protect microcontroller outputs.
• Always use a flyback diode when driving motors, relays, or other inductive loads.
• Ensure adequate gate voltage for complete MOSFET switching.
• Avoid exceeding the maximum voltage and current ratings.
• Use thick PCB traces or appropriate wiring for high-current circuits.

Note: Images are for Illustration Purposes Only.