1N4472

Single Zener Diodes Overview

The Microchip Technology 1N4472 is a military-qualified Zener diode designed for high-reliability applications. It features a nominal Zener voltage of 20 V with a tight tolerance of ±1%. The device supports a maximum power dissipation of 1.5 W and operates within an extended temperature range from -65°C to +175°C junction temperature. Key electrical characteristics include a maximum Zener impedance of 12 Ohms and a reverse leakage current of 50 nA at 16 V. The forward voltage is specified as 1.5 V at 1 A. This component is available in surface-mount packages such as D-5A and SQ-MELF, ensuring robust performance in demanding environments.

Single Zener Diodes Feature Summary

• Military qualification compliant with MIL-PRF-19500/406 standards
• Hermetically sealed void-less glass construction
• High thermal stability across extreme temperature ranges
• Tight voltage tolerance for precision regulation

Single Zener Diodes Applications

• High-reliability aerospace systems
• Military-grade voltage reference circuits
• Harsh environment power supply protection
• Critical defense electronics

Single Zener Diodes Procurement Notes

Verify the specific suffix (e.g., TR, US) to confirm package type and reel configuration. Ensure the required tolerance matches the design needs, as variants exist with different accuracy levels. Confirm military qualification requirements against the specific project specifications before ordering. Check for any recent Product Change Notifications that may affect assembly or labeling details.

Single Zener Diodes Selection Notes

Select this component when strict voltage accuracy and environmental resilience are required. Compare against standard commercial Zener diodes if cost is a primary constraint, noting the premium for military qualification. Consider the physical package constraints, as surface-mount options like D-5A require specific PCB footprint designs. Evaluate thermal management strategies given the 1.5 W power rating and operating temperature limits.

Single Zener Diodes Part Context

This part belongs to the 1N44xx series of Zener diodes manufactured by Microchip Technology. It is part of a broader family of hermetically sealed, surface-mount and through-hole Zener regulators. The series is widely recognized in the defense and aerospace sectors for its reliability and consistent performance under stress. Similar parts in the series offer varying voltage ratings and tolerances to suit diverse circuit requirements.

Single Zener Diodes Replacement Considerations

Direct equivalents include JAN1N4472DUS/TR and JANTXV1N4472DUS. Verify pinout compatibility and package dimensions when substituting. Ensure the replacement meets the same MIL-PRF-19500/406 qualification level if military specs are mandatory.