1N4623-1E3

Overview

The Microchip Technology 1N4623-1E3 is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 4.3 V with a tolerance of ±5%. The device has a maximum power dissipation of 500 mW and operates within a junction temperature range of -65°C to 175°C. Key electrical parameters include a maximum impedance of 1600 Ohms, a reverse leakage current of 2 µA at 2 V, and a forward voltage of 1.1 V at 200 mA. It is housed in the DO-204AH (DO-35) axial through-hole package.

Feature Summary

• Provides stable voltage regulation using silicon Zener technology
• Capable of handling up to 500 mW of power dissipation
• Operates reliably across an extended temperature range up to 175°C
• Constructed in a standard axial through-hole package for easy integration

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in electronic systems
• Clamping applications for signal lines
• General-purpose voltage regulation in consumer electronics

Procurement Notes

Verify the specific suffix '1E3' to confirm RoHS compliance and lead-free status as defined by the manufacturer. Ensure the ordering quantity matches the tape-and-reel packaging requirements if applicable. Confirm that the DO-204AH package dimensions align with the target PCB footprint. Cross-reference the part number with official Microchip documentation to validate current production status and availability constraints before finalizing procurement plans.

Selection Notes

Select this component when a 4.3 V regulation point is required with moderate precision. The 500 mW rating suits low-power applications where thermal management is limited. Consider the 1600 Ohm impedance for noise-sensitive designs, though higher performance options exist. Verify that the axial package fits the assembly process. Compare against alternative manufacturers if supply chain diversification is necessary.

Part Context

This part belongs to the 1N46xx series of low-noise Zener diodes manufactured by Microchip Technology. The series offers various voltage ratings from 2.4 V to 75 V. The 1E3 suffix indicates environmental compliance. These diodes are widely used in general-purpose electronics due to their reliability and standardized package form factor.

Replacement Considerations

Direct substitutes include the 1N4623-TP from Micro Commercial Components. Other compatible alternatives are the 1N749A from Central Semiconductor Corp and the BZX79C4V3 from onsemi. Verify pinout compatibility and thermal characteristics before substitution.