1N4495US

Single Zener Diodes Overview

The Microchip Technology 1N4495US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 180 V and a steady-state power dissipation rating of 1.5 W at 25 °C ambient temperature. It features a hermetically sealed voidless glass package with tungsten slugs, utilizing an internal metallurgical bond for robust construction. The device operates within a junction and storage temperature range of -65 °C to +175 °C. Standard commercial versions offer a 5% voltage tolerance, while military-qualified variants are available in JAN, JANTX, JANTXV, and JANS levels per MIL-PRF-19500/406.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless hard glass package with tungsten slugs and internal metallurgical bonds.
• Military qualification available per MIL-PRF-19500/406 across multiple reliability levels.
• Inherently radiation hard and non-sensitive to electrostatic discharge.
• Triple-layer passivation provides extremely robust construction.

Single Zener Diodes Applications

• High-reliability applications where 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 (JAN, JANTX, JANTXV, or JANS) as these designations affect qualification standards. Confirm RoHS compliance status, noting that compliant versions are restricted to commercial grade only. Ensure the ordering suffix matches the desired tolerance and packaging configuration before procurement.

Single Zener Diodes Selection Notes

Select this component for surface mount designs requiring high thermal stability and radiation hardness. The 1.5 W power rating supports significant current handling compared to lower-power equivalents. Verify that the 180 V breakdown voltage aligns with circuit requirements and that the D-5A MELF package dimensions fit the PCB layout constraints.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of industry-recognized Zener diodes. These devices serve as surface mount equivalents to popular JEDEC registered axial-lead series. The series spans voltages from 3.3 V to 200 V, providing extensive selection options for various voltage regulation needs in both commercial and military-grade packages.

Single Zener Diodes Replacement Considerations

Direct replacements include other parts within the 1N4460US–1N4496US series or the 1N6485US–1N6491US series. Axial-lead equivalents such as the 1N4460–1N4496 and 1N6485–1N6491 are also available if through-hole mounting is preferred.