1N4476US

Single Zener Diodes Overview

The Microchip Technology 1N4476US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 30 V and a maximum power dissipation of 1.5 W at 25 °C ambient temperature. It features a standard voltage tolerance of ±5% and a maximum dynamic impedance of 20 Ohms at the test current of 8.5 mA. The device operates within a junction and storage temperature range of -65 °C to +175 °C, utilizing an A (D-5A) MELF package.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less 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.
• Triple-layer passivation protects the silicon die.

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify the specific reliability level required, as the base part number denotes commercial grade while suffixes indicate military qualifications. Confirm RoHS compliance status, as lead-based terminations are standard for non-commercial grades. Ensure the ordering suffix matches the desired tolerance and packaging configuration before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component for surface mount implementations requiring high thermal stability and hermetic sealing. The 1.5 W power rating supports substantial current handling compared to lower-power equivalents. Verify that the 30 V breakdown aligns with the target regulation voltage and that the MELF footprint fits the PCB layout constraints.

Single Zener Diodes Part Context

This device belongs to the 1N4460US through 1N4496US series of void-less hermetically sealed surface mount Zener diodes. These components serve as the surface mount equivalents to the popular JEDEC registered axial-lead series, offering identical electrical characteristics in a compact D-5A MELF package suitable for automated assembly.

Single Zener Diodes Replacement Considerations

Direct replacements include other 1N4476 variants such as the axial-lead 1N4476 or different reliability levels like JANTX1N4476US if the package form factor allows adaptation.