1N3821A-1

Single Zener Diodes Overview

The 1N3821A-1 is a silicon voltage regulator diode manufactured by Microchip Technology, designed for precision applications. It features a nominal Zener voltage of 3.3 volts at a test current of 76 milliamperes. The device has a maximum dynamic impedance of 10 ohms and handles up to 1 watt of power dissipation. It is housed in a hermetically sealed axial-leaded glass DO-41 package. The component operates within an extended temperature range from -65°C to +175°C and complies with MIL-PRF-19500/115 standards.

Single Zener Diodes Feature Summary

• Hermetically sealed axial-leaded glass DO-41 package
• Extended operating temperature range from -65°C to +175°C
• Compliance with MIL-PRF-19500/115 military specifications

Single Zener Diodes Applications

• Precision voltage regulation in aerospace systems
• Reference voltage sources in defense electronics
• Overvoltage protection circuits in harsh environments

Single Zener Diodes Procurement Notes

Verify the specific suffix and tolerance class required for your application, as this part falls under strict military qualification standards. Confirm that the DO-41 axial leaded package aligns with your PCB layout constraints. Ensure procurement channels are authorized to handle components subject to export control regulations and long production cycles typical of qualified semiconductor devices.

Single Zener Diodes Selection Notes

Select this component when high reliability and wide temperature stability are critical. The 3.3V Zener voltage suits low-voltage reference needs. Consider the 1W power rating for thermal management requirements. The hermetic seal ensures longevity in extreme conditions where standard commercial parts might fail due to moisture or contamination ingress.

Single Zener Diodes Part Context

This part belongs to the 1N3821A-1 through 1N3828A-1 series of silicon voltage regulators. These devices are available in JAN, JANTX, and JANTXV grades per MIL-PRF-19500/115. The series offers tight voltage tolerances, including plus or minus 2% and 1% options with specific suffixes. They provide a robust solution for critical electronic systems requiring stable voltage regulation over wide environmental ranges.

Single Zener Diodes Replacement Considerations

Direct substitutes include other JAN, JANTX, or JANTXV graded versions of the 1N3821A-1 from Microchip. Equivalent parts must match the 3.3V Zener voltage, 1W power rating, and DO-41 package. Verify that any replacement meets the same MIL-PRF-19500/115 qualification standards to ensure compatibility in regulated applications.