1N4623UR-1/TR

Overview

The Microchip Technology 1N4623UR-1/TR is a glass surface mount Zener voltage regulator with a nominal breakdown voltage of 4.3 V and a maximum impedance of 1600 Ohms. It operates within a temperature range of -65°C to +175°C, dissipating up to 0.5 watts at an end cap temperature below 100°C. The device features a hermetically sealed DO-213AA (SOD80/MLL34) MELF package, standard ±5% voltage tolerance, and a typical temperature coefficient of -0.050 %/°C.

Feature Summary

• Hermetically sealed glass MELF package for environmental protection
• Inherently radiation hard construction
• ESD nonsensitive per MIL-STD-750 Method 1020
• Regulates voltage over a broad operating current and temperature range

Applications

• Voltage regulation in harsh environments
• Radiation-hardened circuit designs
• Surface mount assembly requiring high reliability

Procurement Notes

Verify the specific ordering suffixes against official documentation to confirm exact electrical tolerances, metallurgical bond options, and compliance status. Confirm that the TR suffix corresponds to tape and reel packaging specifications before procurement. Ensure the component meets all required military or industrial qualification standards for the intended application.

Selection Notes

Select this component when a hermetically sealed, radiation-hardened surface mount Zener diode is required. The DO-213AA package provides a direct footprint equivalent to axial leads while offering superior thermal performance. Consider the -1 suffix if internal metallurgical bonding is necessary for enhanced mechanical stability.

Part Context

This part belongs to the 1N4614UR through 1N4627UR series of 0.5-watt glass surface mount Zener regulators. These devices serve as surface mount equivalents to JEDEC registered axial-leaded parts, providing a compact solution for voltage reference applications where space and reliability are critical constraints.

Replacement Considerations

Direct substitutes include other 1N4623 variants such as the 1N4623-1E3 from Microchip Technology.