1N4686 (DO35)

Single Zener Diodes Overview

The Microsemi Corporation 1N4686 is a silicon Zener diode housed in a hermetically sealed glass DO-35 (DO-204AH) axial-leaded package. It features a nominal Zener voltage of 3.9V with a standard tolerance of 5% and a power dissipation rating of 0.5W. The device operates within a temperature range of -65°C to +175°C and utilizes double slug type construction for enhanced reliability.

Single Zener Diodes Feature Summary

• Hermetically sealed glass construction using double slug type design
• Internal metallurgical bond option available via suffix designation
• JEDEC registered part number for standardized compatibility

Single Zener Diodes Applications

• Voltage regulation over broad operating current ranges
• Temperature compensation circuits requiring stable reference voltages
• General purpose clipping and clamping applications

Single Zener Diodes Procurement Notes

Verify the specific suffix codes on the component marking, as they determine critical attributes such as metallurgical bonding, military screening levels, and RoHS compliance status. Confirm the manufacturer source, as this part number is produced by multiple vendors including Microsemi and ON Semiconductor, which may affect qualification standards.

Single Zener Diodes Selection Notes

Select this component when a reliable 3.9V reference is required in an axial-leaded form factor. Consider variants with tighter tolerances or specific military prefixes if the application demands higher precision or radiation hardness. Ensure the thermal environment supports the specified maximum junction temperature limits.

Single Zener Diodes Part Context

This component belongs to the widely used 1N4678 series of 0.5W Zener diodes. The series covers a voltage range from 1.8V to 43V in standard packages. The 1N4686 specifically provides the lower end of this voltage spectrum, serving as a fundamental building block for low-voltage regulator designs.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N4686A for standard tolerance and the 1N4686D for 1% tolerance. Surface mount equivalents are available in the MELF/DO-213AA package family.