1N4688-1

Overview

The Microchip Technology 1N4688-1 is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 4.7 V with a tolerance of ±5%. The component supports a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 10 µA at 3 V and a forward voltage of 1.1 V at 200 mA. It utilizes a DO-204AH (DO-35) through-hole package.

Feature Summary

• Provides stable voltage regulation using a single Zener diode configuration
• Capable of operation in extreme environments from -65°C to +175°C
• Features double plug construction with metallurgically bonded elements

Applications

• Voltage reference circuits
• Overvoltage protection
• Clamping applications

Procurement Notes

Verify the specific suffix designation, as variations such as -1 or /TR may indicate different tape-and-reel packaging options while maintaining identical electrical specifications. Confirm RoHS compliance status directly with the manufacturer, as historical data indicates non-compliance for certain variants. Ensure the required operating temperature range aligns with the component's rated limits before finalizing procurement orders.

Selection Notes

Select this component when a precise 4.7 V reference is required in a standard axial leaded package. The wide operating temperature range makes it suitable for industrial or automotive environments where thermal stability is critical. Consider the 500 mW power rating to ensure adequate heat dissipation under continuous load conditions without exceeding junction temperature limits.

Part Context

This part belongs to the Microchip Technology series of compensated Zener diodes. These devices are characterized by low operating currents and high stability. The 1N4688-1 variant specifically offers a 4.7 V breakdown voltage, distinguishing it from other members of the family that provide different voltage levels while sharing similar construction techniques and performance profiles.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4688 equivalents. Verify pinout compatibility and ensure the replacement device meets the same 4.7 V Zener voltage and 500 mW power dissipation requirements. Check for any differences in leakage current specifications if low-power operation is critical.