1N4689 (DO35)

Overview

The Microsemi Corporation 1N4689 is a silicon Zener diode housed in a hermetically sealed glass DO-35 (DO-204AH) axial-leaded package. It provides a nominal Zener voltage of 5.1V with a standard tolerance of ±5%. The device is rated for a maximum power dissipation of 0.5W and operates within a temperature range of -65°C to +175°C.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Metallurgically bonded internal structure for enhanced reliability
• Low operating current capability suitable for precision regulation

Applications

• Voltage reference circuits
• Overvoltage protection
• General-purpose voltage regulation

Procurement Notes

Verify the specific suffix on the part number, as variants such as 1N4689-1 offer tighter tolerances or metallurgical bonding options not present in the base commercial designation. Confirm RoHS compliance status if required, as it varies by manufacturing grade. Ensure the supplier documentation matches the exact JEDEC package code DO-204AH.

Selection Notes

Select this component when a reliable, low-power voltage regulator is needed in an axial leaded form factor. The 5.1V output is common for logic level referencing. Consider the -1 suffix variant if strict tolerance control or military-grade screening is necessary for the application environment.

Part Context

This component belongs to the 1N4678 through 1N4717 series of 0.5-watt Zener diodes manufactured by Microsemi. The series covers a wide voltage range from 1.8V to 43V in the standard configuration. These devices are widely used in industrial and aerospace applications requiring robust voltage regulation.

Replacement Considerations

Equivalent parts include the 1N4689B for tighter tolerance requirements. Surface mount alternatives in the same family include the 1N4689UR-1 in the DO-213AA MELF package.