1N4475

Single Zener Diodes Overview

The Microchip Technology 1N4475 is a military-qualified Zener voltage regulator diode designed for high-reliability applications. It features a hermetically sealed void-less glass package with an internal metallurgical bond, ensuring robust construction. The device provides a nominal Zener voltage of 27 V at a test current of 9.5 mA and supports a steady-state power dissipation of 1.5 W. It operates within a junction temperature range of -65°C to +175°C and exhibits a maximum reverse leakage current of 50 µA at 21.6 V.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction with tungsten slugs
• Internal Category 1 metallurgical bonds for enhanced structural integrity
• Triple-layer passivation providing inherent radiation hardness
• 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 electronic circuits requiring strict environmental sealing
• Voltage regulation in extreme temperature environments (-65°C to +175°C)
• Radiation-hardened electronics and defense instrumentation

Single Zener Diodes Procurement Notes

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

Single Zener Diodes Selection Notes

Select this component when a 27 V reference is needed in harsh environments. Consider the 1.5 W power rating and thermal resistance characteristics for heat management. Evaluate the need for tighter tolerances (1% or 2%) if standard 5% variations are insufficient for the circuit design requirements.

Single Zener Diodes Part Context

This part belongs to the 1N4460–1N4496 series of industry-recognized Zener voltage regulators. These devices are qualified under MIL-PRF-19500/406 and are manufactured by Microchip Technology (formerly Microsemi). The series offers extensive voltage selections from 3.3 V to 200 V in both axial-lead and surface-mount packages.

Single Zener Diodes Replacement Considerations

Equivalent parts include JAN1N4475CUS, JAN1N4475DUS, and JAN1N4475US. Verify compatibility regarding package dimensions, lead configurations, and specific military qualification levels before substitution.