STMicroelectronics

STW45NM50FD

STW45NM50FD Description

The STW45NM50FD from STMicroelectronics is a 500V N-channel Power MOSFET from the FDmesh™ series, designed for high-efficiency power switching applications. With a continuous drain current (Id) of 45A (at case temperature) and a low on-resistance (Rds(on)) of 100mΩ at 10V gate drive, this device minimizes conduction losses, making it ideal for high-power systems. The TO-247-3 through-hole package ensures robust thermal performance, supporting a maximum power dissipation of 417W (Tc). Though marked as obsolete, it remains a reliable choice for legacy designs requiring high-voltage switching with low losses.

STW45NM50FD Features

• High Voltage Rating: 500V Vdss for demanding industrial and automotive applications.
• Low Gate Charge (Qg): 120nC @ 10V ensures fast switching and reduced drive losses.
• Low Input Capacitance (Ciss): 3600pF @ 25V enhances high-frequency performance.
• Optimized for Efficiency: FDmesh™ technology reduces conduction and switching losses.
• Robust Thermal Design: TO-247-3 package with high power dissipation capability (417W).
• Wide Gate-Source Voltage Range: ±30V Vgs(max) for flexible drive circuit compatibility.
• Compliance: ROHS3 compliant, REACH unaffected, and MSL 1 (unlimited) for reliability.

STW45NM50FD Applications

• Switched-Mode Power Supplies (SMPS): High-voltage DC-DC converters and PFC stages.
• Motor Drives & Inverters: Efficient switching in industrial motor control systems.
• Renewable Energy Systems: Solar inverters and wind power converters.
• Automotive & Industrial Power Modules: High-reliability applications requiring rugged MOSFETs.
• Uninterruptible Power Supplies (UPS): High-efficiency energy conversion.

Conclusion of STW45NM50FD

The STW45NM50FD is a high-performance 500V N-channel MOSFET optimized for low-loss power switching in demanding environments. Its FDmesh™ technology, low Rds(on), and high current capability make it suitable for industrial, automotive, and renewable energy applications. While obsolete, its thermal efficiency, rugged packaging, and compliance with environmental standards ensure continued relevance in legacy and high-reliability designs. Engineers seeking a balance of voltage rating, switching speed, and thermal performance may still find value in this MOSFET for specialized applications.