1N4492

Single Zener Diodes Overview

The Microchip Technology 1N4492 is a military-qualified, void-less hermetically sealed glass Zener diode with a nominal voltage of 130 V. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 1.5 W at a lead temperature of +112°C. The device features a test current of 1.9 mA, a maximum dynamic impedance of 500 Ohms, and a maximum reverse leakage current of 5 µA. Standard tolerance is ±5%, with tighter options available via suffixes.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction with internal metallurgical bonds for high reliability
• Qualified per MIL-PRF-19500/406 across JAN, JANTX, JANTXV, and JANS levels
• Inherently radiation hard as described in Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020

Single Zener Diodes Applications

• High-reliability aerospace systems where failure cannot be tolerated
• Military-grade voltage regulation circuits
• Radiation-hardened electronic environments

Single Zener Diodes Procurement Notes

Verify the specific qualification level (JAN, JANTX, JANTXV, or JANS) required for your application, as these are distinct part numbers. Confirm RoHS compliance status, noting that compliant versions are commercial grade only. Ensure ordering suffixes match the desired tolerance and packaging specifications before procurement.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust, hermetically sealed Zener regulation in extreme thermal environments. Consider the 1.5 W power dissipation limit and verify lead length requirements against board layout constraints. Evaluate if higher or lower voltage variants within the 1N4460–1N4496 series better suit the circuit design needs.

Single Zener Diodes Part Context

This device belongs to the industry-recognized 1N4460 through 1N4496 series of 1.5 W glass Zener diodes. The series provides extensive selections from 3.3 to 200 volts. While primarily known for axial-lead DO-41 packages, surface mount D-5A MELF equivalents are also offered by the manufacturer for different mounting configurations.

Single Zener Diodes Replacement Considerations

Direct replacements must match the 130 V nominal voltage, 1.5 W power rating, and hermetic sealing requirement. Verify that any substitute meets the same MIL-PRF-19500/406 qualification level and physical dimensions to ensure compatibility.