SURS8320T3G: A High-Performance Rectifier Diode by onsemi for Demanding Applications

The SURS8320T3G from onsemi stands as a testament to robust engineering in the realm of rectifier diodes. Despite its obsolete status, this component remains a go-to solution for engineers seeking reliable performance in high-voltage, high-current scenarios. This comprehensive guide delves into its technical specifications, real-world applications, and why it continues to be relevant in modern electronics design.

In-Depth Technical Specifications

Voltage and Current Characteristics

With a 200V DC reverse voltage rating and 3A average rectified current, the SURS8320T3G bridges the gap between medium-power and high-power applications. The diode's ultra-low 875mV forward voltage drop at 3A significantly reduces power dissipation compared to standard rectifiers.

Advanced Switching Performance

The diode features fast recovery characteristics with:
- 35ns reverse recovery time
- 500ns recovery speed at >200mA
These parameters make it exceptionally suitable for:
- Switch-mode power supplies (SMPS)
- High-frequency inverters
- PWM motor drives

Thermal and Packaging Details

The SMC (DO-214AB) surface-mount package offers:
- Superior thermal performance with 175 C maximum junction temperature
- Compact footprint for space-constrained designs
- Robust mechanical stability for automotive applications

Comparative Advantages

Against Standard Rectifiers

The SURS8320T3G outperforms conventional diodes with:
- 50% faster recovery time than typical general-purpose rectifiers
- 30% lower forward voltage at rated current
- Wider temperature range (-65 C to 175 C) versus commercial-grade alternatives

Industry Applications

Automotive Systems:
- Alternator rectification
- ECU power circuits
- LED lighting drivers

Industrial Equipment:
- Motor drive circuits
- Welding machine power supplies
- UPS systems

Consumer Electronics:
- LCD/LED TV power boards
- Laptop adapters
- Gaming console power modules

Design Considerations

Thermal Management

For optimal performance:
- Maintain proper PCB copper area for heat dissipation
- Consider thermal vias in high-current applications
- Monitor junction temperature in continuous operation

Circuit Protection

Recommended protection measures:
- Snubber circuits for inductive loads
- TVS diodes for voltage spikes
- Current limiting for capacitive loads

Why Choose SURS8320T3G Today?

Despite its obsolete status, the diode offers:
- Proven reliability from onsemi's quality manufacturing
- Cost-effective solution for legacy designs
- Wide availability through authorized distributors
- Comprehensive documentation for easy design-in

Conclusion

The SURS8320T3G represents an optimal balance of performance and reliability for rectification applications. Its combination of fast switching, low losses, and robust construction makes it particularly valuable for:
- Power supply designers needing efficient rectification
- Automotive engineers requiring temperature-resistant components
- Industrial system developers prioritizing reliability

For technical datasheets, application notes, or purchasing information, visit our specialized semiconductor components section. Our team provides expert support for component selection and system design optimization.