onsemi

FDA50N50

FDA50N50 Description

The FDA50N50 from onsemi is a high-performance N-channel MOSFET designed for demanding power applications. With a 500V drain-to-source voltage (Vdss) and 48A continuous drain current (Id), it delivers robust power handling in a TO-3PN package. This UniFET™ series component features low on-resistance (Rds(on) of 105mOhm @ 24A, 10V), ensuring efficient switching and reduced conduction losses. Although marked as Obsolete, its specifications remain competitive for legacy designs requiring high-voltage, high-current capabilities.

FDA50N50 Features

• High Voltage & Current Rating: 500V Vdss and 48A Id (Tc) for power-intensive applications.
• Low Rds(on): 105mOhm @ 10V gate drive, minimizing power dissipation.
• Fast Switching: Gate charge (Qg) of 137nC @ 10V balances speed and efficiency.
• Robust Construction: TO-3PN package offers superior thermal performance (625W max power dissipation).
• Wide Vgs Range: ±20V gate-to-source voltage tolerance for flexible drive circuitry.
• Compliance: ROHS3 and REACH unaffected, suitable for environmentally conscious designs.

FDA50N50 Applications

• Switched-Mode Power Supplies (SMPS): High-efficiency PFC and DC-DC converters.
• Motor Drives & Inverters: Reliable performance in industrial and automotive systems.
• Uninterruptible Power Supplies (UPS): High-voltage handling for backup power systems.
• Welding Equipment: Sustained high-current operation in arc welding machines.
• Audio Amplifiers: Low-loss switching in high-power Class-D designs.

Conclusion of FDA50N50

The FDA50N50 is a high-voltage, high-current MOSFET optimized for efficiency and thermal management. While obsolete, its low Rds(on), high power dissipation, and rugged TO-3PN package make it a viable choice for legacy or niche applications requiring 500V/48A performance. Ideal for SMPS, motor drives, and industrial systems, it balances switching speed with robustness, though designers should consider modern alternatives for new projects.