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IRFZ44Z

IRFZ44Z Description

The IRFZ44Z from Infineon Technologies is an N-channel HEXFET® power MOSFET designed for high-efficiency switching applications. With a 55V drain-to-source voltage (Vdss) and 51A continuous drain current (Id), it delivers robust performance in power management circuits. The device features a low on-resistance (Rds(on)) of 13.9mΩ at 10V gate drive, minimizing conduction losses. Its input capacitance (Ciss) of 1420pF and gate charge (Qg) of 43nC ensure fast switching, making it suitable for high-frequency applications. Though marked as obsolete, its reliability and performance remain relevant for legacy designs.

IRFZ44Z Features

• Low Rds(on): 13.9mΩ @ 31A, 10V for reduced power dissipation.
• High Current Handling: 51A continuous drain current (Tc) for demanding loads.
• Fast Switching: Optimized gate charge (43nC) and capacitance for efficiency.
• Robust Construction: TO-220AB package with 80W power dissipation (Tc).
• Wide Vgs Range: ±20V gate-to-source voltage tolerance.
• HEXFET® Technology: Low conduction losses and high reliability.

IRFZ44Z Applications

• DC-DC Converters: Efficient power conversion in industrial and automotive systems.
• Motor Drives: High-current switching for brushed/brushless motors.
• Power Supplies: SMPS, UPS, and inverter designs requiring low Rds(on).
• Load Switching: Battery management and protection circuits.
• Legacy Systems: Maintenance and repair of older electronics where replacements are scarce.

Conclusion of IRFZ44Z

The IRFZ44Z remains a viable choice for engineers needing a cost-effective, high-performance MOSFET in power electronics. Its low on-resistance, high current capability, and fast switching make it ideal for energy-efficient designs. While obsolete, its TO-220AB package and proven HEXFET® technology ensure compatibility with existing systems. For applications demanding reliability under high stress, this MOSFET delivers consistent performance.