STMicroelectronics

STF21N90K5  

Single FETs, MOSFETs

STF21N90K5 Description

The STF21N90K5 from STMicroelectronics is a high-performance N-channel 900V power MOSFET, part of the SuperMESH5™ series, designed for demanding switching applications. With a continuous drain current (Id) of 18.5A (at 25°C case temperature) and a low on-resistance (Rds(on)) of 299mΩ at 10V gate drive, this device ensures efficient power handling with minimal conduction losses. Its TO-220FP package offers robust thermal performance, supporting a maximum power dissipation of 40W (Tc). The MOSFET features a gate charge (Qg) of 43nC and an input capacitance (Ciss) of 1645pF, enabling fast switching speeds while maintaining stability.

STF21N90K5 Features

• High Voltage Rating: 900V Vdss for high-power applications.
• Low Rds(on): 299mΩ @ 10V Vgs reduces conduction losses.
• Fast Switching: Optimized Qg (43nC) and Ciss (1645pF) for efficient performance.
• Robust Construction: TO-220FP package ensures superior thermal management.
• Wide Gate Drive Range: ±30V Vgs(max) enhances flexibility in drive circuits.
• Reliability: RoHS3 compliant, REACH unaffected, and MSL1 rated for long-term durability.
• SuperMESH5™ Technology: Delivers lower conduction losses and improved switching efficiency compared to standard MOSFETs.

STF21N90K5 Applications

• Switched-Mode Power Supplies (SMPS): Ideal for high-voltage DC-DC converters and PFC stages.
• Motor Drives: Suitable for industrial motor control and inverter systems.
• Lighting: Efficiently powers LED drivers and ballast circuits.
• Renewable Energy: Used in solar inverters and energy storage systems.
• Industrial Equipment: Reliable performance in welding machines and UPS systems.

Conclusion of STF21N90K5

The STF21N90K5 combines high voltage capability, low on-resistance, and fast switching to deliver superior performance in power electronics. Its SuperMESH5™ technology and rugged TO-220FP package make it an excellent choice for engineers designing high-efficiency, high-reliability systems. Whether in SMPS, motor drives, or renewable energy applications, this MOSFET stands out for its durability, efficiency, and versatility.

STF21N90K5 Documents

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