1N4623UR/TR

Single Zener Diodes Overview

The Microchip Technology 1N4623UR/TR is a 0.5-watt glass surface mount Zener voltage regulator belonging to the 1N4614UR through 1N4627UR series. It features a nominal Zener voltage of 4.3 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and utilizes a hermetically sealed DO-213AA (SOD80/MLL34) MELF package. Electrical characteristics include a maximum Zener impedance of 1600 Ohms at a test current of 250 µA, a maximum reverse current of 2.0 µA, and a typical noise density of 2.0 µV/√Hz.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA surface mount package
• Internal metallurgical bond construction
• Inherently radiation hard design
• ESD nonsensitive per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• Voltage regulation in surface mount circuits
• High reliability applications requiring radiation hardness
• Temperature compensation networks

Single Zener Diodes Procurement Notes

Verify that the ordering suffix 'TR' corresponds to the Tape & Reel packaging option as specified in the datasheet. Confirm the presence of the 'e3' suffix indicates RoHS compliance with annealed matte-Tin plating. Ensure the part number matches the specific 4.3 V variant within the 1N4614UR-1N4627UR series before procurement.

Single Zener Diodes Selection Notes

Select this component for designs requiring a 4.3 V reference in a compact surface mount form factor. The DO-213AA package serves as a surface mount equivalent to the axial-leaded DO-35 package. Consider the wide operating temperature range and radiation hardness when choosing this device for harsh environments or high-reliability systems.

Single Zener Diodes Part Context

This part is part of the 1N4099UR thru 1N4135UR and 1N4614UR thru 1N4627UR series of 0.5 watt glass surface mount Zeners. These devices provide a selection from 1.8 to 100 volts. The series is JEDEC registered and offers internal metallurgical bond options. Tighter tolerances are available with specific suffixes, while standard versions maintain ±5% voltage tolerance.

Single Zener Diodes Replacement Considerations

The datasheet identifies the 1N4623UR as a surface mount equivalent to the JEDEC registered 1N4623 series. No other specific substitute part numbers are documented in the provided source material.