1N4680UR-1/TR

Overview

The Microchip Technology 1N4680UR-1/TR is a 500 mW surface mount Zener voltage regulator in a hermetically sealed DO-213AA (MELF) package. It provides a nominal Zener voltage of 2.2 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and features a low Zener test current of 50 µA. Electrical characteristics include a maximum reverse leakage current of 4.0 µA at the specified voltage and a maximum DC Zener current of 200 mA.

Feature Summary

• Hermetically sealed glass DO-213AA MELF style surface mount package
• Internal metallurgical bond between metal slugs and silicon die for high reliability
• Inherently radiation hard construction
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020

Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability electronic circuits requiring radiation hardness
• Surface mount assembly for compact power management designs

Procurement Notes

Verify the specific suffix configuration against the manufacturer's nomenclature guide, as options such as RoHS compliance or tighter voltage tolerances may alter the part number. Confirm that the tape and reel packaging aligns with automated placement requirements. Ensure the selected variant meets the necessary environmental screening standards if the application demands military-grade reliability specifications beyond commercial offerings.

Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for high-reliability applications. The DO-213AA package offers a direct footprint equivalent to through-hole JEDEC registered types while providing superior thermal and mechanical stability. Consider the 50 µA test current for low-power biasing scenarios and verify that the 500 mW power dissipation rating suits the thermal design constraints of the target PCB layout.

Part Context

This device belongs to the 1N4678UR-1 through 1N4717UR-1 series of 0.5 W glass surface mount Zener regulators. The series covers a voltage selection from 1.8 V to 43 V, offering standard ±5% tolerance with optional 1% and 2% variants. These components are designed as surface mount equivalents to the traditional JEDEC registered 1N4678 through 1N4717 series, maintaining similar electrical performance in a modern package format.

Replacement Considerations

Direct replacements include other manufacturers' DO-213AA MELF Zener diodes with matching 2.2 V nominal voltage and 500 mW power rating. Verify pinout polarity and hermetic sealing requirements before substitution.