Part Number: IRFZ44NPBF

Manufacturer: Infineon Technologies

Description: MOSFET N-CH 55V 49A TO220AB

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of IRFZ44NPBF

Datasheet  IRFZ44NPBF datasheet
Category Discrete Semiconductor Products
Family Transistors – FETs, MOSFETs – Single
Manufacturer Infineon Technologies
Series HEXFET?
Packaging Tube
FET Type MOSFET N-Channel, Metal Oxide
FET Feature Standard
Drain to Source Voltage (Vdss) 55V
Current – Continuous Drain (Id) @ 25°C 49A (Tc)
Rds On (Max) @ Id, Vgs 17.5 mOhm @ 25A, 10V
Vgs(th) (Max) @ Id 4V @ 250μA
Gate Charge (Qg) @ Vgs 63nC @ 10V
Input Capacitance (Ciss) @ Vds 1470pF @ 25V
Power – Max 94W
Operating Temperature -55°C ~ 175°C (TJ)
Mounting Type Through Hole
Package / Case TO-220-3
Supplier Device Package TO-220AB

IRFZ44NPBF Introduction

Due to its low on-resistance, rapid switching, and tough device architecture, the IRFZ44NPBF is a well-known N-channel power MOSFET frequently used in power applications. International Rectifier, which is now a part of Infineon Technologies AG, is the company that makes it. This article will serve as a comprehensive guide to the IRFZ44NPBF, including its features, characteristics, uses, and benefits.


The HEXFET® Power MOSFETs from International Rectifier use cutting-edge manufacturing techniques to deliver exceptionally low on-resistance per silicon area. This feature, along with the HEXFET power MOSFETs’ well-known fast switching speed and ruggedized device design, gives the designer an incredibly efficient and dependable device for various applications. At power dissipation levels of up to 50 watts, the TO-220 package is consistently selected for all commercial and industrial applications. The TO-220’s widespread industry acceptance is largely attributed to its low thermal resistance and affordable packaging.

Features and Specifications

The IRFZ44NPBF belongs to the HEXFET family of power MOSFETs and features extremely low on-resistance per silicon area thanks to state-of-the-art fabrication techniques. This feature provides the designer with a reliable and efficient tool for use in various applications, in addition to the HEXFET power MOSFETs’ well-known fast switching speed and ruggedized device architecture.

The TO-220 package in which the IRFZ44NPBF is housed is the standard choice for all commercial and industrial applications with power dissipation levels up to about 50 watts. The TO-220 is widely used in the industry thanks to its low thermal resistance and affordable packaging.

Advanced Process Technology: To precisely regulate the size and shape of the internal MOSFET structures, the IRFZ44NPBF is produced utilizing advanced process technology. The final product has a low on-resistance per silicon area, which correlates to the great efficiency and little heat dissipation.

A large current load can be supported by the IRFZ44NPBF thanks to its ultra-low on-resistance of just 17 milliohms, which prevents excessive power from being lost as heat.

The IRFZ44NPBF can endure high-frequency switching without experiencing voltage spikes that could harm the component because of its dynamic dv/dt rating of 40 volts per nanosecond.

The IRFZ44NPBF is appropriate for use in high-temperature applications such as automotive systems and industrial equipment because it is rated to work at temperatures up to 175°C.

Fast Switching: The IRFZ44NPBF features a fast switching rate that enables it to react swiftly to changes in the input signal by turning it on and off. This makes it perfect for use in motor control circuits, switching power supplies, and other applications where quick switching is essential.

The IRFZ44NPBF is completely avalanche-rated, which means it can resist high-voltage spikes without breaking down or being damaged. It is, therefore, perfect for usage in situations where high reliability and endurance are required.

Lead-Free: The IRFZ44NPBF complies with RoHS (Restriction of Hazardous Substances) rules because it is lead-free. This indicates that it doesn’t include any potentially harmful substances like lead, cadmium, or mercury, making it safer for the environment and people’s health.

Overall, the IRFZ44NPBF’s extra qualities make it a great option for various power-switching applications, especially those that call for high efficiency, little heat dissipation, and dependable operation under challenging conditions. The IRFZ44NPBF is a well-liked option among designers and manufacturers, whether you are constructing a switching power supply, a motor control circuit, or an automobile system. It offers a combination of technical and practical advantages.


Power supply, DC-DC converters, motor control circuits, and automotive systems are just a few applications that use the IRFZ44NPBF. Additionally, it is employed in high-frequency circuits like RF amplifiers and oscillator circuits, where its quick switching is especially useful.

The IRFZ44NPBF is frequently used in power supplies because they need high current and voltage capabilities. Power losses are reduced, and efficiency is increased thanks to its low on-resistance and quick switching speed.

IRFZ44NPBF is also utilized in DC-DC converter circuits, frequently found in data centers, telecommunications equipment, and other applications that call for effective power conversion.

Circuits for motor control that call for high-speed switching and high current capability use the IRFZ44NPBF. It is frequently employed in robotics, automotive, and industrial machinery motor control applications.

Automotive Systems: The IRFZ44NPBF is also employed in automotive systems, which calls for excellent device dependability and rugged construction. It is frequently utilized in transmission control units, engine management systems, and other automotive applications.


A common option for power-switching applications is the IRFZ44NPBF due to a number of benefits:

  • Low On-Resistance: The IRFZ44NPBF features a very low on-resistance per silicon area, which helps to reduce power losses and boost efficiency.
  • High Switching Speed: The IRFZ44NPBF offers a high switching speed that is appropriate for high-frequency applications and minimizes switching losses.
  • The IRFZ44NPBF is appropriate for usage in tough environments and automotive systems because of its ruggedized device design.
  • Wide Operating Temperature: The IRFZ44NPBF can function over a broad temperature range, making it appropriate for use in applications requiring a high-temperature operation.
  • Cost-Effective: The TO-220 package of the IRFZ44NPBF is a cost-effective option for power-switching applications, which helps to explain its widespread industry appeal.
  • The IRFZ44NPBF has a number of practical benefits for designers and manufacturers in addition to its technological benefits, including the following:
  • The IRFZ44NPBF is readily accessible from numerous providers, making it simple for designers and manufacturers to source.
  • Because of its wide range of MOSFET and power device compatibility, the IRFZ44NPBF is simple to include in current designs.
  • Design Support: For designers and manufacturers who use the IRFZ44NPBF, International Rectifier, now Infineon Technologies AG, offers a wealth of technical resources, including datasheets, application notes, and simulation tools.


Popular N-channel power MOSFETs like the IRFZ44NPBF offer reliable and effective power switching for various applications. Power supplies, DC-DC converters, motor control circuits, and automotive systems frequently choose it because of its low on-resistance, high switching speed, and ruggedized device design. With significant technical support and resources from Infineon Technologies AG, the IRFZ44NPBF is reasonably priced and widely accessible. For designers and producers that need high-performance power switching in their applications, the IRFZ44NPBF is a great option overall.

Furthermore, if you want to order the IRFZ44NPBF or learn more about its specs, they strongly suggest that you contact ICRFQ, your reliable electronic component dealer. Make a call to ICRFQ right away!

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