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IRFZ44NPbF

IRFZ44NPbF

MPN: IRFZ44NPBF
Infineon (formerly International Rectifier)
Popular 55 V TO-220 N-channel MOSFET with comparable Rds(on) for general-purpose 12/24 V switching.
10,319 in stock

Overview

The IRFZ44NPbF is a 55 V N-channel HEXFET Power MOSFET designed for high-speed switching and low on-resistance. Housed in a standard TO-220AB package, it is capable of handling continuous drain currents up to 49 A under optimal thermal conditions. Its rugged design and 175 degrees C operating temperature make it a reliable choice for power conversion and load switching applications.

Why Choose This Part

The IRFZ44NPbF offers a high junction temperature rating of 175 degrees C, providing significant thermal headroom in demanding environments. Its advanced HEXFET technology ensures low Rds(on) and fast switching, reducing power dissipation during state transitions.

Applications

DC Motor PWM Control
Switching high-current DC motors in robotics and industrial actuators using PWM signals.
Solenoid and Relay Drivers
Driving heavy inductive loads in automation systems that require fast switching speeds.
DC-to-DC Converters
Functioning as a power switch in buck, boost, or flyback converter topologies for 12V or 24V systems.
Battery Protection Circuits
Serving as a high-side or low-side switch for disconnect and protection in multi-cell battery packs.

Getting Started

To integrate this MOSFET, ensure the gate-to-source voltage (Vgs) is driven sufficiently high to minimize conduction losses, typically via a dedicated gate driver IC or a logic-level shifter for 3.3V/5V controllers. Proper heat sinking is essential when operating near the 49 A maximum current limit to manage the thermal output of the TO-220 package.

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