1N4492US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4492US/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 130.0 V and a maximum steady-state power dissipation of 1.5 W at 25°C ambient temperature. It operates within a junction and storage temperature range of -65°C to +175°C, featuring a maximum dynamic impedance of 500 Ohms at the test current of 1.9 mA. The device utilizes a voidless hermetically sealed glass package with tungsten slugs in an A (D-5A) MELF configuration.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for robust reliability.
• Military qualification available per MIL-PRF-19500/406 across JAN, JANTX, JANTXV, and JANS levels.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• High-reliability applications where component failure cannot be tolerated.
• Voltage regulation over broad operating current and temperature ranges.
• Radiation-hardened electronic systems.

Single Zener Diodes Procurement Notes

Verify the specific reliability level required, as the base part number covers multiple qualification grades including JAN, JANTX, JANTXV, and JANS. Confirm RoHS compliance status if applicable, noting that compliant versions are restricted to commercial grade only. Ensure the ordering suffix matches the desired tolerance and packaging specifications defined in the manufacturer's nomenclature guide.

Single Zener Diodes Selection Notes

Select this component for designs requiring high-voltage regulation up to 200 V in a surface mount form factor. Consider the 1.5 W power rating and thermal resistance characteristics for heat management. Verify that the 130 V nominal voltage aligns with circuit requirements and check the 500 Ohm dynamic impedance against signal integrity needs.

Single Zener Diodes Part Context

This device belongs to the 1N4460US through 1N4496US series of industry-recognized 1.5 Watt Zener voltage regulators. These components serve as surface mount equivalents to popular JEDEC registered axial-lead series, offering a compact alternative for space-constrained high-reliability PCB layouts while maintaining equivalent electrical performance profiles.

Single Zener Diodes Replacement Considerations

Direct replacements include other members of the 1N4460US–1N4496US series from Microchip Technology. Cross-manufacturer equivalents must match the 130 V Zener voltage, 1.5 W power rating, D-5A MELF package dimensions, and military qualification standards.

Single Zener Diodes FAQ

What is the maximum continuous Zener current for the 1N4492US?

The maximum continuous regulator current (IZM) is 11 mA.

Is the 1N4492US radiation hard?

Yes, the device is inherently radiation hard as described in Microsemi MicroNote 050.