1N5821-T

Overview

The Diodes Incorporated 1N5821-T is a 3.0A Schottky barrier rectifier housed in the DO-201AD axial leaded package. It features a peak repetitive reverse voltage of 30V and a maximum average rectified output current of 3.0A at a lead temperature of 95°C. The device exhibits a low forward voltage drop, ranging from 0.500V to 0.900V depending on the forward current conditions. It supports a non-repetitive peak forward surge current of 80A and operates within a junction temperature range of -65°C to +125°C.

Feature Summary

• Guard ring die construction provides transient protection for the silicon chip.
• Plastic case material meets UL flammability classification rating 94V-0.
• Terminals are plated leads solderable per MIL-STD-202, Method 208.

Applications

• Low voltage, high frequency inverters
• Free wheeling circuits
• Polarity protection

Procurement Notes

Verify the specific manufacturer designation when sourcing this component, as multiple producers supply the 1N5821 standard. Confirm that the ordered part matches the required DO-201AD package and electrical ratings. Ensure compliance with RoHS directives if applicable to your assembly process. Cross-reference datasheet specifications against the supplier's documentation to validate performance parameters before integration.

Selection Notes

Select this component for applications requiring efficient rectification in low voltage environments. The Schottky technology ensures minimal power loss and high efficiency compared to standard PN junction diodes. Consider the thermal resistance characteristics and derating curves when designing heat dissipation strategies for continuous operation near maximum current limits.

Part Context

This component belongs to the 1N5820 through 1N5822 series of 3.0A Schottky barrier rectifiers. The series shares identical mechanical dimensions and current handling capabilities, differing primarily in their maximum repetitive reverse voltage ratings. The 1N5821 specifically targets circuits requiring a 30V blocking capability while maintaining the high surge current tolerance characteristic of the family.

Replacement Considerations

Compatible substitutes include the 1N5820 and 1N5822 from Diodes Incorporated or equivalent parts from other manufacturers such as Rectron or ON Semiconductor. Verify that replacement devices maintain the same DO-201AD footprint and meet or exceed the 30V reverse voltage and 3.0A current requirements.

FAQ

What is the typical thermal resistance from junction to lead?

The typical thermal resistance from junction to lead (RθJL) is 10°C/W when mounted vertically on a printed circuit board with a 0.500-inch lead length.

How does the forward voltage vary with current?

The forward voltage ranges from 0.500V to 0.900V at an instantaneous forward current of 3.0A, and increases to between 0.850V and 0.950V at a higher forward current of 9.4A.