1N4622-1

Single Zener Diodes Overview

The Microchip Technology 1N4622-1 is a silicon unidirectional Zener voltage regulator diode housed in a hermetically sealed axial-lead glass DO-35 (DO-204AH) package. It features an internal metallurgical bond and operates within a junction temperature range of -65°C to +175°C. The device provides a nominal Zener voltage of 3.9 V at a test current of 250 µA, with a maximum dynamic impedance of 1650 Ω and a maximum reverse leakage current of 2.5 µA at 2.0 V. Rated for 0.5 W power dissipation, it offers standard ±5% voltage tolerance.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for enhanced reliability
• Hermetically sealed glass DO-35 axial-lead package
• Qualified per MIL-PRF-19500/435 up to JANS level
• Low noise density characteristics suitable for sensitive circuits

Single Zener Diodes Applications

• High-reliability voltage regulation
• Radiation-hardened electronic systems
• Precision reference voltage generation

Single Zener Diodes Procurement Notes

Verify the specific qualification level required for your application, as this series is available in JAN, JANTX, JANTXV, and JANS grades. Confirm RoHS compliance status if applicable, noting that commercial versions may differ from military-qualified parts. Ensure the ordering suffix matches the desired tolerance and packaging configuration before finalizing procurement.

Single Zener Diodes Selection Notes

Select the 1N4622-1 when a stable 3.9 V reference is needed in harsh environments requiring radiation hardness or high thermal stability. The internal metallurgical bond distinguishes this variant from standard commercial equivalents. Consider the low leakage current and specific impedance values when designing precision analog front ends or protection circuits.

Single Zener Diodes Part Context

This component belongs to the 1N4614-1 through 1N4627-1 series of 500 mW metallurgically bonded glass Zener diodes. These devices are JEDEC registered and designed for applications demanding high reliability. The series spans voltages from 1.8 V to 100 V, offering various tolerance options including 5%, 2%, and 1%.

Single Zener Diodes Replacement Considerations

Equivalent parts include other manufacturers' 1N4622 variants meeting DO-35 specifications. Verify electrical parameters such as Zener voltage tolerance and maximum dynamic impedance match the original design requirements. Ensure replacement components support the required operating temperature range and radiation hardness levels if used in aerospace or defense contexts.