1N4623UR/TR

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.

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

Applications

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

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.

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.

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.

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.