HER303G

Overview

The HER303G is a general-purpose ultra-fast recovery diode manufactured by HY Electronic (Cayman) Limited. It features a 200V maximum repetitive reverse voltage and a 3A average forward rectified current rating. The device utilizes a DO-27 axial leaded package, suitable for through-hole mounting applications. Key electrical characteristics include a maximum DC reverse leakage current of 5.0µA at rated voltage and a typical reverse recovery time of 50ns. The component operates with a forward voltage drop of 1.0V at full load and supports junction temperatures up to 125°C.

Feature Summary

• Ultra-fast recovery characteristic enabling high-frequency switching operations
• General-purpose design for broad rectification applications
• Robust axial leaded construction for reliable through-hole integration

Applications

• High-frequency rectifier circuits
• Free-wheeling diodes in power supplies
• Snubber circuits for voltage spike suppression

Procurement Notes

Verify the manufacturer designation matches HY Electronic (Cayman) Limited on the component marking. Confirm the package type is DO-27 and the voltage rating is 200V. Request the official datasheet to validate specific electrical limits before finalizing procurement decisions.

Selection Notes

Select this component when a fast-recovery diode with 200V blocking capability and 3A current handling is required. Ensure the application circuit does not exceed the specified peak repetitive reverse voltage or average forward current ratings under all operating conditions.

Part Context

This part belongs to the HER3xxG series of ultra-fast recovery diodes from HY Electronic (Cayman) Limited. The series offers various voltage ratings while maintaining consistent current and package specifications across models.

Replacement Considerations

Compatible substitutes within the same series include HER304G (300V) and HER305G (400V), provided the higher voltage ratings do not conflict with circuit design constraints.