1N4694UR-1/TR

Overview

The Microchip Technology 1N4694UR-1/TR is a surface mount Zener diode in the 1N4678UR-1 through 1N4717UR-1 series. It features a hermetically sealed glass DO-213AA (MELF) package with internal metallurgical bonding for high reliability. The device provides a nominal Zener voltage of 8.2 V at a test current of 50 µA, with a maximum reverse leakage current of 1.0 µA and a maximum DC Zener current of 58.0 mA. It supports a steady-state power dissipation of 0.5 W across an operating temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed glass DO-213AA MELF package with internal metallurgical bond
• High reliability construction suitable for demanding environments
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020
• Inherently radiation hard design

Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability electronic circuits requiring stable reference voltages
• Radiation-hardened system designs

Procurement Notes

Verify the specific suffix configuration against official documentation to confirm RoHS compliance status and tolerance grade. The 'TR' suffix indicates tape and reel packaging; ensure this matches the required handling equipment. Confirm that the ordering nomenclature aligns with the intended reliability level and screening requirements specified by the manufacturer.

Selection Notes

Select this component when a surface mount Zener regulator with hermetic sealing and high thermal stability is required. The 8.2 V nominal voltage and 500 mW power rating suit applications needing precise regulation within a compact form factor. Consider the tight voltage tolerances and low leakage characteristics for sensitive circuit protection or reference applications.

Part Context

This part belongs to the 1N4678UR-1 through 1N4717UR-1 series of 0.5-watt glass surface mount Zener voltage regulators. These devices serve as the surface mount equivalents of the JEDEC registered 1N4678 through 1N4717 axial leaded series. They are designed to provide robust voltage regulation in space-constrained PCB layouts while maintaining high reliability standards.

Replacement Considerations

Direct replacements include other parts from the 1N4678UR-1 through 1N4717UR-1 series with matching voltage ratings. Verify package compatibility with the DO-213AA footprint. Ensure any substitute maintains the required hermetic seal and metallurgical bond characteristics if high reliability is critical.