1N4621-1

Single Zener Diodes Overview

The Microchip Technology 1N4621-1 is a 500 mW Zener voltage regulator housed in an axial-lead glass DO-35 package. It features a nominal Zener voltage of 3.6 V with a standard tolerance of ±5%. The device utilizes an internal metallurgical bond and is qualified per MIL-PRF-19500/435 for high reliability applications, including JAN, JANTX, JANTXV, and JANS levels. It operates within a junction temperature range of -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction
• Hermetically sealed glass axial-lead package
• Qualified for high reliability military standards

Single Zener Diodes Applications

• Voltage regulation over broad current and temperature ranges
• High reliability aerospace and defense circuits
• Radiation-hardened electronic systems

Single Zener Diodes Procurement Notes

Verify the specific qualification level (JAN, JANTX, JANTXV, or JANS) required for your application, as availability varies by grade. Confirm RoHS compliance status if mandated, noting that commercial versions may differ from mil-qualified parts. Ensure ordering suffixes match exact specifications, as they do not inherently change function without explicit documentation.

Single Zener Diodes Selection Notes

Select this component when a stable 3.6 V reference is needed in harsh environments. The DO-35 package supports flexible axial-lead mounting. Consider the maximum noise density and dynamic impedance characteristics for precision requirements. Verify thermal derating curves against expected ambient temperatures to ensure safe operation within the 500 mW power rating.

Single Zener Diodes Part Context

This part belongs to the 1N4614-1 through 1N4627-1 series of 500 mZener diodes. These devices are JEDEC registered and designed for robust performance. The series offers voltages from 1.8 V to 100 V with various tolerance options. They are constructed for durability in demanding industrial and military settings.

Single Zener Diodes Replacement Considerations

Direct substitutes include other 1N4621 variants with matching voltage and tolerance. Check for equivalent mil-qualified parts from authorized manufacturers. Ensure replacement components meet the same radiation hardness and hermetic sealing requirements.