1N3821A-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N3821A-1/TR is a silicon voltage regulator diode with a nominal Zener voltage of 3.3V at a test current of 76mA. It features a dynamic impedance of 10 ohms and operates within a junction temperature range of -65°C to +175°C. The device is housed in a hermetically sealed axial-leaded glass DO-41 package, suitable for through-hole mounting. It offers a power handling capability of 1W and maintains a tolerance of ±5%.

Single Zener Diodes Feature Summary

• Hermetically sealed axial-leaded glass construction
• High operating junction temperature capability
• Tight voltage tolerance options available

Single Zener Diodes Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the specific suffix against official documentation to confirm packaging format and compliance status. Ensure the ordering code matches the required MIL-PRF-19500/115 qualification level. Confirm that the supplier provides valid traceability data for aerospace or defense applications if applicable.

Single Zener Diodes Selection Notes

Select this component when a stable 3.3V reference is required in high-reliability environments. The DO-41 package supports robust mechanical mounting. Consider the thermal characteristics and maximum power dissipation limits during circuit design to ensure safe operation under all expected load conditions.

Single Zener Diodes Part Context

This part belongs to the 1N3821A(UR)-1 series of silicon voltage regulator diodes manufactured by Microchip Technology. The series includes various voltage ratings from 3.3V to 6.2V. These components are designed for military and industrial applications requiring high reliability and consistent performance over wide temperature ranges.

Single Zener Diodes Replacement Considerations

Cross-reference with other manufacturers offering MIL-PRF-19500/115 qualified 3.3V Zener diodes in DO-41 packages. Verify electrical parameters such as Zener impedance and leakage current match the original specifications before substitution.