The IRFZ44N is a world-standard N-channel power MOSFET designed for high-current switching at moderate voltages. Unlike logic-level FETs, this component is a “Standard Gate” MOSFET, requiring a gate voltage of 10V to 12V to fully switch on, making it perfect for dedicated gate driver circuits.
Table of Contents
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IRFZ44N Pinout (TO-220)
| Pin Number | Terminal Name | Description |
| 1 | Gate (G) | Control terminal; requires 10V-12V to fully open. |
| 2 | Drain (D) | Connected to the negative side of the load. |
| 3 | Source (S) | Connected to the circuit ground (GND). |
Technical Specifications
- Max Drain-Source Voltage (VDS): 55V
- Max Continuous Drain Current (ID): 49A
- Gate Threshold Voltage (VGS(th)): 2.0V to 4.0V
- On-Resistance (RDS(on)): 0.017 Ω
- Total Power Dissipation (PD): 94W
Key Features & Benefits
- High Current Handling: Supports continuous loads up to 49A with proper cooling.
- Advanced Process Technology: Extremely low on-resistance per silicon area.
- Industry Standard: Widely available and supported in countless open-source designs.
Common Applications
- High-current PWM motor controllers.
- Audio amplifiers and power stages.
- Automotive electrical systems.
IRFZ44N Equivalent & Substitutes
- IRLZ44N (Logic-level version)
- STP55NF06
- IRFB3206
Related Tutorials on elxhub
- Master Selection: Need help choosing? See our Ultimate MOSFET Selection Guide.
- Signal Shifting: Learn how to bridge logic levels in our Logic Level Shifter Tutorial.
- Basics: Learn more in Transistors – Basics, Types, and Working.
Conclusion
The IRFZ44N remains a staple in the electronics industry for its balance of high current capacity and affordability, though users must remember to drive the gate with sufficient voltage for maximum efficiency.
Download the MOSFET Datasheet pdf
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