IRLZ44N N-Channel Power MOSFET | ATMOSFÆR ENGINEERING

Logic-level N-channel MOSFET designed for low-voltage gate drive applications. Fully enhanced with 5V gate voltage, making it ideal for direct interfacing with Arduino, ESP32, and other 3.3V/5V microcontrollers. High current capacity and low on-resistance enable efficient switching of motors, LED strips, solenoids, and other high-power loads.

Technical Specifications:

• Type: N-Channel Enhancement Mode MOSFET
• Package: TO-220 (3-pin through-hole)
• Drain-Source Voltage (VDS): 55V
• Continuous Drain Current (ID): 47A @ 25°C, 30A @ 100°C
• Pulsed Drain Current (IDM): 190A
• Gate-Source Voltage (VGS): ±16V max
• Threshold Voltage (VGS(th)): 1.0V - 2.0V (typical 1.3V)
• On-Resistance (RDS(on)): 0.022Ω @ VGS=10V, 0.028Ω @ VGS=5V
• Logic Level: Fully enhanced at 5V gate voltage
• Power Dissipation (PD): 94W @ 25°C (with heatsink)
• Operating Temperature: -55°C to +175°C
• Switching Speed: Fast (tr ~12ns, tf ~11ns)

Pin Configuration (viewed from front):

1. Gate (G): Control input from microcontroller
2. Drain (D): High-voltage/current connection (load positive)
3. Source (S): Ground connection

Features:

• Logic-level compatible (works with 3.3V and 5V microcontrollers)
• Very low on-resistance for minimal heat and voltage drop
• High current handling (47A continuous)
• Fast switching for PWM applications
• No heatsink needed for loads <10A (with adequate airflow)
• Avalanche rated for inductive load protection

Applications:

• DC motor control (up to 30A+)
• High-power LED strip dimming (12V/24V)
• Solenoid and relay driving
• Heating element control
• Electric bike/scooter controllers
• 3D printer heated bed control
• High-side switching with P-channel driver
• Arduino/ESP32 PWM motor control
• Battery disconnect circuits

Typical Circuit:

• Gate → GPIO pin (via 100-220Ω resistor recommended)
• Gate → 10kΩ pull-down resistor to GND (prevents floating)
• Drain → Load positive terminal
• Source → GND
• Load negative → Power supply positive

Important Notes:

• Add 10kΩ pull-down resistor from gate to ground to prevent accidental turn-on
• Use 100-220Ω gate resistor to limit current and reduce ringing
• Add flyback diode (1N4007 or similar) across inductive loads (motors, solenoids)
• Heatsink recommended for continuous currents >10A or high-frequency PWM
• Cannot switch AC loads (DC only)

Advantages:

• Works directly with 5V/3.3V logic (no driver IC needed)
• Much better than standard MOSFETs (IRF540 requires 10V+ gate voltage)
• Low heat generation due to very low RDS(on)

Compatible with Arduino, ESP32, Raspberry Pi, and any 3.3V/5V microcontroller GPIO. Perfect replacement for mechanical relays in DC switching applications.