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Transistor MOSFET N-Channel IRFZ44NPBF TO220

Transistor MOSFET N-Channel IRFZ44NPBF TO220

The IRFZ44NPBF is a high-performance N-channel MOSFET designed for power switching applications. It supports a high continuous drain current of up to 49A and a drain-source voltage of 55V. With its low RDS(on) of 17mΩ and fast switching characteristics, it's commonly used in DC motor drivers, power supplies, inverters, and lighting controls. Housed in a TO-220 package, the device is easy to mount on heatsinks for efficient thermal management.

Package Includes:

  • 1 x IRFZ44NPBF N-Channel MOSFET

MOSFET
4.20 AED 4.20 AED (Tax included)

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Features:

  • High power handling capability (49A continuous current)
  • Low on-state resistance (RDS(on) = 17mΩ)
  • Fast switching speed with low gate charge
  • TO-220 package for easy heatsink mounting
  • Low input and output capacitance for improved efficiency
  • High avalanche ruggedness
  • Robust design for high reliability
  • Can operate in high-temperature environments (up to 175°C)

 

Principle of Work:

This MOSFET operates using the electric field effect. When a voltage is applied to the Gate, it forms a conductive channel between the Drain and Source, allowing current to flow. In an N-channel MOSFET like the IRFZ44NPBF, applying a positive voltage (>10V) to the Gate relative to the Source allows electrons to flow from Drain to Source. Removing the gate voltage closes the channel, stopping current flow — making it ideal for switching applications.

Pinout:

IRFZ44NPBF Pinout

  • Gate (G): Controls current flow (turns the MOSFET on/off)
  • Drain (D): Current flows from load into this terminal
  • Source (S): Current flows out to ground or the return path

Applications:

  • Switching power supplies
  • DC motor speed control
  • LED dimming and lighting control
  • Audio amplifiers
  • Inverter circuits (DC to AC conversion)
  • Battery charging circuits
  • High current switches for power electronics

Circuit Example:

Basic MOSFET switch circuit to control a DC motor:

IRFZ44N Circuit Example

  • Drain → Connected to the negative terminal of the motor
  • Motor positive terminal → Battery positive
  • Source → Battery negative (GND)
  • Gate → Push button + 10K resistor between gate and GND

Technical Details:

Parameter Value
VDS (Drain-Source Voltage) 55V
VGS (Gate-Source Voltage) ±20V
ID (Continuous Drain Current) 49A
IDM (Pulsed Drain Current) 196A
RDS(on) (On Resistance) 17.5mΩ
Qg (Gate Charge) 60nC
Package TO-220AB
Operating Temperature Range -55°C to +175°C

Resources:

Comparison with TIP120:

Specification IRFZ44NPBF TIP120
Technology N-Channel MOSFET Darlington Transistor
Max Voltage 55V 60V
Current Rating 49A (continuous) 5A (max)
On Resistance / VCE(sat) 17.5mΩ ~2V
Switching Speed Fast Moderate
Price Higher Lower