1N4624-1

Overview

The Microchip Technology 1N4624-1 is a 500 mW metallurgically bonded glass Zener diode in an axial-lead DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 4.7 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65 °C to +175 °C. Key electrical characteristics include a maximum dynamic impedance of 1550 Ohms, a maximum reverse current of 5 µA at 3 V, and a test current of 250 µA.

Feature Summary

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

Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability applications requiring military qualification
• Radiation-hardened circuit designs

Procurement Notes

Verify the specific reliability level required, as the base part number covers multiple qualification grades including JAN, JANTX, JANTXV, and JANS. Confirm RoHS compliance status, as non-RoHS versions are standard for military grades while RoHS options are limited to commercial variants. Ensure the ordering suffix matches the desired package style and termination plating specifications.

Selection Notes

Select this component for applications requiring a stable 4.7 V reference with low leakage current. Consider the ±5% voltage tolerance and 1550 Ohm impedance for precision requirements. Evaluate the thermal derating curve if operating near the maximum power dissipation limit. Verify that the axial-lead form factor fits the PCB layout constraints compared to surface mount alternatives.

Part Context

This device belongs to the 1N4614-1 through 1N4627-1 series of 500 mW Zener diodes manufactured by Microchip Technology. The series offers voltages from 1.8 V to 100 V with various tolerance options. These components are JEDEC registered and designed for robust performance in demanding environments, utilizing a glass DO-35 package for hermetic sealing.

Replacement Considerations

Equivalent parts include the 1N4624-1/TR tape and reel variant. Surface mount equivalents are available in the 1N4614UR-1 through 1N4627UR-1 series using the DO-213AA package.