1N4686UR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4686UR-1/TR is a 0.5 W surface mount Zener voltage regulator in the DO-213AA package. It provides a nominal Zener voltage of 3.9 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and features a test current of 50 µA. Maximum reverse leakage current is specified at 5.0 µA, while the maximum DC Zener current reaches 2.0 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA (MELF) surface mount package
• Internal metallurgical bond between metal slugs and silicon die for high reliability
• Inherently radiation hard construction
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

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

Single Zener Diodes Procurement Notes

Verify that the specific part number includes the UR-1 suffix to confirm the internal metallurgical bond and hermetic sealing characteristics required for high-reliability applications. Confirm RoHS compliance status if environmental regulations apply, as commercial versions may differ from screened military equivalents.

Single Zener Diodes Selection Notes

Select this component when a hermetically sealed surface mount Zener diode is required for environments demanding high reliability and radiation hardness. Ensure the circuit design accommodates the 50 µA test current and verify that the 0.5 W power dissipation rating aligns with thermal management constraints on the printed circuit board.

Single Zener Diodes Part Context

This device belongs to the 1N4678UR-1 through 1N4717UR-1 series of 0.5 W glass surface mount Zener voltage regulators. It serves as the surface mount equivalent of the JEDEC registered 1N4678 through 1N4717 axial leaded series, offering identical electrical performance in a compact DO-213AA package suitable for automated assembly processes.

Single Zener Diodes Replacement Considerations

Equivalent axial leaded parts include the 1N4686-1. Surface mount alternatives without the metallurgical bond feature are available within the standard 1N4678UR series.