1N4620UR-1

Single Zener Diodes Overview

The Microchip Technology 1N4620UR-1 is a 3.3 V Zener voltage regulator diode housed in a surface mount glass DO-213AA package. It features an internal metallurgical bond and is qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS reliability levels. The device operates within a junction temperature range of -65°C to +175°C with a rated power dissipation of 0.5 W. Electrical characteristics include a maximum reverse current of 3.5 µA at 1.5 V, a dynamic impedance of 1650 Ohms, and a noise density of 1.5 µV/√Hz.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA MELF style package
• Internal metallurgical bond construction
• Qualified up to the JANS level for high reliability applications
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability electronic systems requiring radiation hardness
• Surface mount circuit designs replacing axial-leaded equivalents

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application when ordering, as prefixes modify the part number. Confirm RoHS compliance status, noting that commercial versions may differ from military qualifications. Ensure the correct suffix is applied if tape and reel packaging is needed instead of bulk supply.

Single Zener Diodes Selection Notes

Select this component for applications requiring low capacitance and hermetic sealing in a compact surface mount form factor. Consider the negative temperature coefficient of -0.075 %/°C for thermal stability requirements. Evaluate the maximum dynamic impedance of 1650 Ohms against the load regulation needs of the target circuit design.

Single Zener Diodes Part Context

This device belongs to the 1N4614UR-1 through 1N4627UR-1 series of 500 mW metallurgically bonded glass surface mount Zener diodes. These components serve as surface mount equivalents to the JEDEC registered 1N4099 through 1N4135 and 1N4614 through 1N4627 series. The series provides voltages from 1.8 to 100 volts with standard 5% tolerance options.

Single Zener Diodes Replacement Considerations

Commercial equivalents are available under the CDLL prefix, specifically CDLL4620-1. Axial-leaded replacements exist in the 1N4620-1 series using the DO-35 package. Verify pinout compatibility and thermal resistance differences when transitioning between package styles.