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IRF450

IRF450 Description

The IRF450 from Infineon Technologies is an N-channel HEXFET® MOSFET designed for high-voltage switching applications. With a 500V drain-to-source voltage (Vdss) and 12A continuous drain current (Id), it delivers robust performance in power electronics. Although marked as obsolete, its legacy design remains relevant for specific high-voltage use cases. The device features a low on-resistance (Rds(on)) of 500mOhm at 12A, 10V, ensuring efficient power handling with minimal conduction losses. Packaged in a TO-204AA (TO-3) through-hole format, it suits applications requiring high thermal dissipation.

IRF450 Features

• High Voltage Rating: 500V Vdss for demanding power circuits.
• Low Gate Charge (Qg): 120nC at 10V, enabling fast switching and reduced drive losses.
• High Power Handling: 150W max dissipation (Tc) with TO-3 package for superior thermal management.
• Wide Vgs Range: ±20V gate tolerance for flexible drive compatibility.
• Low Threshold Voltage (Vgs(th)): 4V at 250µA, ensuring easy turn-on.
• REACH Unaffected: Compliant with environmental regulations.

IRF450 Applications

The IRF450 excels in:

• Switching Power Supplies: High-voltage DC-DC converters and offline SMPS.
• Motor Drives: Inverters and H-bridge configurations for industrial motors.
• Audio Amplifiers: High-power Class-D designs.
• Industrial Equipment: Relays, solenoids, and inductive load switching.
• Legacy Systems: Maintenance or replacements in existing high-voltage designs.

Conclusion of IRF450

While obsolete, the IRF450 remains a reliable choice for high-voltage, medium-current applications requiring rugged performance. Its low Rds(on), high power dissipation, and TO-3 package make it ideal for thermally challenging environments. Engineers working with industrial power systems or retrofit designs may still find it valuable despite newer alternatives. Infineon’s HEXFET® technology ensures efficiency and durability, cementing its legacy in power electronics.