1N4618UR/TR

Single Zener Diodes Overview

The Microchip Technology 1N4618UR/TR is a glass surface mount Zener voltage regulator with a nominal breakdown voltage of 2.7 V at a test current of 250 µA. It utilizes a hermetically sealed DO-213AA (SOD80/MLL34) MELF package and operates within a temperature range of -65°C to +175°C. The device features a maximum Zener impedance of 1500 Ohms, a maximum reverse leakage current of 1.0 µA, and a typical temperature coefficient of -0.075 %/°C. It provides 0.5 W steady-state power dissipation and is radiation hard.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA MELF package
• Inherently radiation hard construction
• ESD nonsensitive per MIL-STD-750 Method 1020
• Minimal capacitance characteristics

Single Zener Diodes Applications

• Voltage regulation in harsh environments
• Reference voltage sources for precision circuits
• Protection against electrostatic discharge events

Single Zener Diodes Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging configuration as defined by EIA-481-1-A standards. Confirm RoHS compliance status via the 'e3' designation if applicable to your supply chain requirements. Ensure procurement channels source directly from authorized Microchip distributors to guarantee component authenticity and traceability.

Single Zener Diodes Selection Notes

Select this component when a surface mount equivalent to axial-leaded 1N4618 is required. Consider its radiation hardness for aerospace or high-altitude applications. Evaluate the 2.7 V nominal voltage against circuit requirements and verify that the 1500 Ohm impedance meets noise and stability specifications for the intended load conditions.

Single Zener Diodes Part Context

This part belongs to the 1N4614UR through 1N4627UR series of 0.5 Watt glass surface mount Zeners. These devices serve as direct surface mount replacements for JEDEC registered axial-leaded diodes like the 1N4618. The series offers voltages from 1.8 to 100 Volts with standard 5% tolerance options.

Single Zener Diodes Replacement Considerations

Direct surface mount equivalents include MLL4618. Axial-leaded counterparts are identified as 1N4618. Military qualified variants with internal metallurgical bonds exist under the 1N4618-1 suffix.