irlz44n – logic level n channel power mosfet – infineon technologies

IRLZ44N – Logic Level N-Channel Power MOSFET – Infineon Technologies

Key features:

  • N-Channel Power MOSFET
  • Drain-Source Voltage: 55V
  • Continuous Drain Current: 47A
  • Low On-Resistance: 0.022Ω (max)
  • Logic-level gate drive (3.3V/5V compatible)
  • Low gate threshold voltage: 1V – 2V
  • Fast switching speed
  • Avalanche rated
  • Operating temperature: -55°C to 175°C
  • TO-220 package
Get a Quote
Categories: , Brand: ,

The IRLZ44N is a popular N-Channel power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) manufactured by Infineon Technologies (formerly International Rectifier) . It is widely recognized for its excellent switching characteristics and is specifically designed as a logic-level gate drive MOSFET, making it ideal for direct interfacing with microcontrollers and low-voltage logic circuits.

A key distinguishing feature of the IRLZ44N is its very low gate threshold voltage (Vgs(th) typically 1V to 2V), which allows it to be fully turned on by logic-level signals from 3.3V or 5V microcontrollers such as Arduino, Raspberry Pi, ESP32, and STM32 . This eliminates the need for additional gate driver circuits in many applications, significantly simplifying designs.

The device features a planar cell structure optimized to provide a wide Safe Operating Area (SOA), ensuring reliability and robustness under varying operating conditions . The silicon is optimized for applications that switch at frequencies below 100 kHz, making it well-suited for low to moderate-frequency switching applications .

The IRLZ44N is available in multiple package variants:

  • IRLZ44N / IRLZ44NPBF: TO-220 through-hole package

  • IRLZ44NSTRLPBF: D2PAK (TO-263) surface-mount package

The “PbF” suffix indicates lead-free, RoHS-compliant versions of the device.

Note on Part Number: Do not confuse with IRFZ44N, which requires higher gate drive voltage (typically 10V) for full activation. The IRLZ44N (with an ‘L’ for Logic-level) is optimized for direct MCU control.

Parameters

Parameters Specifications
Manufacturer Infineon Technologies (formerly International Rectifier)
Part Number IRLZ44N / IRLZ44NPBF
FET Type N-Channel
Technology MOSFET (Metal Oxide)
Drain-Source Voltage (Vdss) 55V
Continuous Drain Current (Id) @ 25°C 47A
Pulsed Drain Current (Idm) 188A (t ≤ 10µs)
Gate-Source Voltage (Vgs) Max ±16V to ±20V
On-Resistance Rds(on) Max 0.022Ω @ Vgs = 10V, Id = 25A
Gate Threshold Voltage Vgs(th) 1.0V – 2.0V (max 2V @ 250µA)
Total Gate Charge (Qg) Typ 38nC – 48nC
Input Capacitance (Ciss) Typ 1700pF – 2000pF @ Vds = 25V
Output Capacitance (Coss) Typ 450pF
Reverse Transfer Capacitance (Crss) Typ 250pF
Rise Time (tr) Typ 20ns
Fall Time (tf) Typ 44ns
Power Dissipation (Pd) Max 110W (Tc=25°C)
Junction Temperature -55°C to +175°C
Package Type TO-220AB / D2PAK (TO-263)
RoHS Compliant Yes

Applications

  • Microcontroller-Driven Switching – Direct interface with Arduino, ESP32, STM32, and other 3.3V/5V logic-level MCUs without gate drivers

  • DC Motor Control – Driving small to medium DC motors in robotics, drones, and automation projects

  • PWM Speed Control – High-frequency PWM dimming and speed regulation for motors and LEDs

  • DC-DC Converters – Efficient power conversion in buck/boost topologies for portable devices

  • Power Management – Load switching and battery management in battery-powered systems

  • Solid-State Relays – Replacement of electromechanical relays for faster switching and higher reliability

  • Battery Charging Circuits – Switching elements in solar charge controllers and battery management systems

  • Power Supplies – Switching regulators and power supply units

  • Inverters – DC-AC power conversion applications

  • Automotive Electronics – Aftermarket electronics, lighting control (within 55V rating)

  • H-Bridge Circuits – Bidirectional motor control for robotics and actuators

Why choose IRLZ44N over IRFZ44N: The IRLZ44N’s logic-level gate drive capability allows direct connection to microcontroller output pins (3.3V/5V), while the IRFZ44N typically requires a dedicated gate driver circuit (10V+). For low-voltage, battery-operated, or MCU-based projects, IRLZ44N is the superior choice.

Related products

Scroll to Top