1N3821AUR-1

Single Zener Diodes Overview

The 1N3821AUR-1 is a silicon Zener diode manufactured by Microchip Technology, designed for surface-mount applications. It features a DO-213AB (MELF) glass package and operates within an extended temperature range of -65°C to +175°C. The device provides a nominal Zener voltage of 3.3V with a maximum power dissipation of 1W. Key electrical characteristics include a maximum Zener impedance of 10 ohms and a reverse leakage current of 3 µA at 2V. The component utilizes double plug construction and is available in JAN, JANTX, and JANTXV grades per MIL-PRF-19500/115.

Single Zener Diodes Feature Summary

• Double plug construction for enhanced reliability
• Leadless MELF glass package design
• Extended high-temperature operational capability

Single Zener Diodes Applications

• Voltage regulation in military systems
• Precision reference circuits in aerospace electronics
• High-reliability industrial control equipment

Single Zener Diodes Procurement Notes

Verify the specific grade suffix (JAN, JANTX, or JANTXV) required for your application, as these denote different quality levels under MIL-PRF-19500/115. Confirm that the DO-213AB MELF package orientation matches your PCB footprint. Ensure the supplier provides traceability documentation consistent with military procurement standards. Check for any recent PCNs regarding assembly site changes or labeling updates before finalizing orders.

Single Zener Diodes Selection Notes

Select this component when a robust, leadless surface-mount Zener diode is needed for harsh environments. The 3.3V rating suits low-voltage reference applications. Consider the 1W power dissipation limit relative to ambient temperature derating curves. The extended temperature range makes it suitable for defense and space applications where standard commercial parts would fail. Verify compatibility with automated placement equipment due to the small MELF form factor.

Single Zener Diodes Part Context

This part belongs to the 1N3821AUR-1 through 1N3828AUR-1 series of silicon Zener diodes. These components are produced by Microchip Technology (formerly Microsemi) and comply with MIL-PRF-19500/115 specifications. The series offers various voltage options in a standardized leadless package, providing a reliable alternative to traditional axial-leaded Zener diodes in modern surface-mount designs.

Single Zener Diodes Replacement Considerations

Direct parameter-equivalent replacements may include other manufacturers' MELF Zener diodes with identical 3.3V voltage, 1W power rating, and DO-213AB package dimensions. However, military-grade variants require verification against MIL-PRF-19500/115 standards. Cross-reference thermal resistance and impedance values to ensure circuit stability is maintained during substitution.