STMicroelectronics

STN3N40K3

STN3N40K3 Description

The STN3N40K3 from STMicroelectronics is a 400V N-channel MOSFET belonging to the SuperMESH3™ series, designed for high-efficiency power switching applications. With a continuous drain current (Id) of 1.8A (Tc) and a low on-resistance (Rds On) of 3.4Ω @ 600mA, 10V, it delivers robust performance in compact surface-mount packages. The device features a gate charge (Qg) of 11nC @ 10V and an input capacitance (Ciss) of 165pF @ 50V, ensuring fast switching and reduced power losses. Its ±30V gate-to-source voltage (Vgs) tolerance and 4.5V threshold voltage (Vgs(th)) make it suitable for high-voltage designs. Packaged in SOT-223 (Tape & Reel), it is ideal for space-constrained applications.

STN3N40K3 Features

• High Voltage Rating: 400V Vdss for robust operation in high-voltage circuits.
• Low Gate Charge (Qg): 11nC @ 10V minimizes switching losses and improves efficiency.
• Low On-Resistance: 3.4Ω @ 600mA, 10V reduces conduction losses.
• Wide Vgs Range: ±30V ensures compatibility with various drive circuits.
• Fast Switching: Optimized input/output capacitance for high-frequency applications.
• Reliable Packaging: SOT-223 (TR) for easy surface mounting and thermal performance.
• Compliance: ROHS3, REACH Unaffected, ECCN EAR99 for global market suitability.

STN3N40K3 Applications

• Switch-Mode Power Supplies (SMPS): Efficient power conversion in AC/DC and DC/DC designs.
• Lighting Systems: LED drivers and ballast control due to high-voltage handling.
• Motor Control: Low-loss switching in brushed/brushless motor drives.
• Industrial Automation: Power management in PLCs and inverters.
• Consumer Electronics: Compact power solutions for adapters and chargers.

Conclusion of STN3N40K3

The STN3N40K3 stands out as a high-performance 400V MOSFET with low Rds On, fast switching, and excellent thermal characteristics, making it ideal for high-efficiency power systems. Its SuperMESH3™ technology ensures superior performance over conventional MOSFETs, while the SOT-223 package offers space-saving advantages. Suitable for industrial, consumer, and lighting applications, this device combines reliability with cutting-edge power management capabilities.