STMicroelectronics

STW54NM65ND

STW54NM65ND Description

The STW54NM65ND from STMicroelectronics is a high-performance N-channel 650V, 49A power MOSFET housed in a TO-247-3 package. Part of the FDmesh™ II series, this device leverages advanced MOSFET (Metal Oxide) technology to deliver low conduction losses and high switching efficiency. With a low on-resistance (Rds(on)) of 65mΩ at 10V gate drive and 24.5A drain current, it ensures minimal power dissipation, making it ideal for high-power applications. Although marked as Obsolete, its robust design and 350W (Tc) power dissipation capability remain relevant for legacy systems and specific industrial uses.

STW54NM65ND Features

• High Voltage & Current Rating: 650V Vdss and 49A continuous drain current (Tc) enable use in demanding power circuits.
• Low Rds(on): 65mΩ @ 10V Vgs reduces conduction losses, improving efficiency.
• Fast Switching: Gate charge (Qg) of 188nC @ 10V and input capacitance (Ciss) of 6200pF @ 50V ensure responsive performance in high-frequency applications.
• Thermal Robustness: 150°C junction temperature (TJ) and TO-247-3 package enhance heat dissipation.
• Reliability: ROHS3 Compliant, REACH Unaffected, and MSL 1 (Unlimited) for environmental and handling resilience.
• Wide Gate Drive Range: ±25V Vgs(max) offers flexibility in drive circuit design.

STW54NM65ND Applications

• Switched-Mode Power Supplies (SMPS): High-voltage DC-DC converters and PFC stages.
• Motor Drives & Inverters: Efficient power switching in industrial motor control systems.
• Renewable Energy Systems: Solar inverters and wind turbine converters requiring high breakdown voltage.
• Industrial Automation: High-current switching in robotics and CNC machinery.
• Legacy Electronics: Suitable for repairs or upgrades of older high-power designs.

Conclusion of STW54NM65ND

The STW54NM65ND combines high voltage tolerance, low on-resistance, and thermal stability, making it a strong choice for power electronics despite its obsolete status. Its FDmesh™ II technology ensures superior performance in high-efficiency, high-frequency applications, particularly where low conduction losses are critical. While newer alternatives may exist, this MOSFET remains a reliable option for industrial, renewable energy, and high-power switching systems.