Preventing MOSFET Breakdown: Key Strategies for Reliable Operation

1. Overvoltage Protection:
   Use Zener diodes or Transient Voltage Suppressors (TVS) to clamp gate-source voltage within safe limits . For high-energy transients, TVS diodes with fast response times divert excess voltage, preventing gate oxide breakdown .
2. Current Limiting:
   Series resistors or PTC thermistors restrict current flow during surges, while fuses provide fail-safe protection against sustained overcurrent . Ensure MOSFETs operate within their Safe Operating Area (SOA), avoiding thermal runaway caused by excessive current-voltage combinations .
3. ESD Control:
   Implement ESD protection diodes between gate-source and drain-source terminals to absorb electrostatic shocks . Maintain a static-free environment during handling—use conductive packaging, grounded tools, and anti-static wrist straps .
4. Thermal Management:
   Heat sinks, thermal vias, and optimized PCB layouts enhance heat dissipation. Avoid prolonged operation near maximum junction temperature (Tjmax) to prevent performance degradation .
5. Circuit Design Best Practices:

• Drive MOSFETs with stable gate voltages to avoid overstress.

• Add RC snubbers to suppress voltage spikes in inductive loads .

• Shorten gate traces to minimize parasitic inductance .

YFW Microelectronics’ MOSFETs, such as the YFW4N65AMJ and YFW40P03DF, are engineered with built-in ESD protection and low RDS(on) for efficient heat management . Partner with us for customized solutions that ensure long-term reliability in automotive, industrial, and consumer applications.

Visit www.yfwdiode.com for technical resources and product specifications