1N6821

Overview

The Microchip Technology 1N6821 is a low voltage drop Schottky barrier rectifier designed for high-efficiency applications. It features a tungsten/platinum Schottky barrier and an oxide passivated structure to ensure very low leakage currents. The device provides guard ring protection for increased reverse voltage robustness. It is housed in a DO-201AD (DO-4) plastic axial leaded package, suitable for through-hole mounting. Key electrical characteristics include a peak repetitive reverse voltage of 45 V and a continuous forward current rating of 150 A.

Feature Summary

• Tungsten/platinum Schottky barrier construction
• Oxide passivated structure for minimal leakage
• Guard ring protection for enhanced reliability

Applications

• Low voltage high frequency inverters
• Free wheeling diode circuits
• DC-to-DC converters
• Polarity protection systems

Procurement Notes

Verify the specific manufacturer source, as the 1N6821 designation has been produced by multiple entities including Microsemi and onsemi. Confirm that the component matches the required 45V reverse voltage and 150A current ratings. Ensure the package type is DO-201AD and check for RoHS compliance status if required for your assembly process. Cross-reference datasheets to confirm pinout and thermal specifications.

Selection Notes

Select this component when low forward voltage drop is critical for system efficiency. The 150A current capacity makes it suitable for high-power DC-DC conversion or inverter applications. The DO-201AD package offers robust mechanical stability for industrial environments. Consider the 45V reverse voltage limit to ensure adequate headroom for the operating circuit.

Part Context

The 1N6821 belongs to the broader family of Schottky barrier rectifiers known for fast switching speeds and low conduction losses. Unlike standard silicon PN junction diodes, the metal-semiconductor junction reduces recovery time. This specific part number represents a high-current variant within the axial leaded Schottky category, often used where thermal performance and efficiency are prioritized over compact surface-mount solutions.

Replacement Considerations

The Vishay 1N5821/65 is a related Schottky rectifier but differs significantly in current rating (3A vs 150A). Direct substitution requires verifying that the lower current rating of alternatives does not compromise the circuit's power handling requirements. Ensure any replacement maintains the DO-201AD package form factor.