1N4620-1

Single Zener Diodes Overview

The Microchip Technology 1N4620-1 is a 500 mW metallurgically bonded glass Zener diode in an axial-lead DO-35 package. It provides a nominal Zener voltage of 3.3 V at a test current of 250 µA, with a maximum dynamic impedance of 1650 Ohms and a reverse leakage current of 1.5 µA. The device operates within a junction temperature range of -65°C to +175°C and features a temperature coefficient of -0.075 %/°C.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for high reliability
• Qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS levels
• Hermetically sealed axial-lead glass DO-35 package
• Inherently radiation hard

Single Zener Diodes Applications

• High reliability voltage regulation
• Military and aerospace circuits
• Harsh environment applications requiring radiation hardness

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as the base part number covers multiple qualification grades. Confirm RoHS compliance status if environmental regulations apply, noting that RoHS versions are typically commercial grade only. Ensure the ordering suffix matches the desired tolerance and packaging format.

Single Zener Diodes Selection Notes

Select this component when a stable 3.3 V reference is needed in a through-hole axial configuration. Consider the high dynamic impedance of 1650 Ohms, which may limit suitability for low-noise or high-current regulation compared to lower impedance alternatives. Verify thermal derating requirements against the operating ambient temperature to ensure power dissipation remains within the 500 mW limit.

Single Zener Diodes Part Context

This device belongs to the 1N4614-1 through 1N4627-1 series of 500 mZener diodes manufactured by Microchip Technology. These components share common mechanical and electrical characteristics, differing primarily in their nominal Zener voltage ratings. The series is designed for robust performance in demanding environments where standard commercial diodes may fail.

Single Zener Diodes Replacement Considerations

Equivalent parts include other manufacturers' 1N4620 variants meeting MIL-PRF-19500/435 specifications. Verify pinout compatibility and package dimensions (DO-35) before substitution. Ensure the replacement meets the required radiation hardness and temperature coefficient specifications.