1N4688 (DO35)

Overview

The Microsemi Corporation 1N4688 is a silicon Zener diode housed in a DO-35 glass axial-lead package. It provides a nominal voltage of 5.6V 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
• Low operating current capability
• Double slug type design

Applications

• Voltage regulation
• Voltage reference circuits
• Overvoltage protection

Procurement Notes

Verify the specific manufacturer source, as this component is produced by multiple vendors including Microsemi and CDI-Diodes. Confirm that the package matches the DO-35 specification and check for any suffixes indicating metallurgical bonding or military qualification if required for your application.

Selection Notes

Select this component when a standard 5.6V Zener voltage is needed in a compact axial-lead form factor. Ensure the circuit can handle the 0.5W power rating and verify that the ±5% tolerance meets the system requirements.

Part Context

This part belongs to the 1N4678 through 1N4717 series of 0.5-watt Zener voltage regulators. These components are widely used as surface mount equivalents to older JEDEC registered standards and offer reliable performance in commercial and industrial environments.

Replacement Considerations

Compatible replacements include the 1N4688B from other manufacturers, provided they match the DO-35 package and 5.6V specifications.