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IRFR4105Z

IRFR4105Z Description

The IRFR4105Z 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 30A continuous drain current (Id), it offers robust performance in power management circuits. This surface-mount device features a low on-resistance (Rds(on)) of 24.5mΩ at 10V gate drive, minimizing conduction losses. Its 740pF input capacitance (Ciss) and 27nC total gate charge (Qg) ensure fast switching, making it suitable for high-frequency applications. Although marked as obsolete, its reliability and performance remain relevant for legacy designs.

IRFR4105Z Features

• Low Rds(on): 24.5mΩ @ 18A, 10V reduces power dissipation.
• High Current Handling: 30A continuous drain current (Tc) for demanding loads.
• Fast Switching: Optimized gate charge (27nC) and low Ciss (740pF) enhance efficiency.
• Wide Vgs Range: ±20V gate-source voltage tolerance for flexible drive requirements.
• Robust Packaging: DPAK (TO-252) surface-mount package ensures thermal performance (48W max power dissipation).
• Reliability: REACH unaffected and MSL 1 (unlimited) moisture sensitivity for stable storage.

IRFR4105Z Applications

The IRFR4105Z excels in:

• DC-DC Converters: High-efficiency buck/boost circuits due to low Rds(on).
• Motor Drives: Robust current handling for brushed/brushless motor control.
• Power Supplies: Switching regulators and SMPS designs.
• Automotive Systems: Auxiliary power modules (non-critical, given obsolete status).
• Industrial Load Switching: Relays, solenoids, and high-current switches.

Conclusion of IRFR4105Z

The IRFR4105Z balances performance and cost-effectiveness, offering low conduction losses and fast switching despite its obsolete status. Its HEXFET® technology ensures durability, while the DPAK package aids thermal management. Ideal for engineers maintaining legacy systems or seeking proven MOSFET performance in power electronics, though newer alternatives should be evaluated for forward-looking designs.