1N5821

Overview

The Diotec Semiconductor 1N5821 is a Schottky Barrier Rectifier Diode designed for general-purpose rectification. It features an average forward current rating of 3 A and a maximum repetitive peak reverse voltage of 30 V. The device utilizes a DO-201AD axial leaded package, ensuring compatibility with through-hole mounting configurations. Electrical characteristics include a maximum forward voltage of 0.90 V at 9.4 A and a typical junction capacitance of 80 pF at 4 V reverse bias. Thermal resistance values are specified as 25 K/W from junction to ambient and 8 K/W from junction to lead.

Feature Summary

• Schottky barrier construction provides fast switching capabilities and low power loss during operation.
• High surge current capability supports handling transient loads without failure.
• Plastic case material meets UL94V-0 flame retardant standards for safety compliance.
• Lead plating ensures solderability according to MIL-STD-202E method 208C.

Applications

• General-purpose rectification in power supply circuits
• Free-wheeling diodes for inductive load protection
• Polarity protection in electronic systems

Procurement Notes

Verify the specific manufacturer datasheet before integration, as electrical parameters such as leakage current and thermal resistance may vary between production batches or suppliers. Confirm that the DO-201AD package dimensions match your PCB footprint requirements. Ensure the component grade aligns with standard commercial/industrial reliability expectations rather than automotive or life-support specifications.

Selection Notes

Select this component when a 3 A continuous current rating and 30 V blocking voltage are required in a through-hole package. Consider the 0.90 V forward voltage drop for efficiency calculations in low-voltage applications. Evaluate the 80 pF junction capacitance if high-frequency switching performance is critical for the target circuit design.

Part Context

This part belongs to the 1N582x series of Schottky Barrier Rectifiers, which includes variants with different voltage ratings such as the 1N5820 (20 V) and 1N5822 (40 V). All members share identical current ratings and physical packaging but differ in their maximum repetitive peak reverse voltage specifications. This series is widely used in standard commercial electronics requiring reliable rectification.

Replacement Considerations

Cross-reference with other manufacturers offering the 1N5821 designation, such as Vishay or Taiwan Semiconductor, ensuring DO-201AD compatibility. Verify that substitute parts maintain the same 3 A current and 30 V voltage ratings. Check for equivalent thermal resistance and forward voltage characteristics to ensure circuit performance remains unchanged.