1N4690UR-1/TR

Overview

The Microchip Technology 1N4690UR-1/TR is a Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.6 V with a tight tolerance of ±2%. The device is rated for a maximum power dissipation of 0.5 W and utilizes the DO-213AA (MELF) surface-mount package. It operates within an extended temperature range from -65 °C to +175 °C. This component provides high reliability through metallurgical bonding, making it suitable for demanding electronic environments requiring stable voltage reference or protection.

Feature Summary

• Provides precise voltage regulation with a 5.6 V nominal Zener voltage and ±2% tolerance
• Features a rugged glass body MELF package with internal metallurgical bonding for enhanced durability
• Supports operation across a wide industrial temperature range extending up to 175 °C

Applications

• Precision voltage reference circuits in sensitive instrumentation
• Overvoltage protection for low-voltage signal lines
• Voltage clamping in high-reliability aerospace or defense electronics

Procurement Notes

Verify the specific suffix configuration when ordering, as the UR-1 designation indicates a metallurgically bonded variant distinct from standard versions. Confirm RoHS compliance status directly with the manufacturer, as historical data suggests non-compliance for certain variants in this series. Ensure the reel quantity matches the required production volume, as tape-and-reel packaging is standard for this surface-mount form factor.

Selection Notes

Select this component when a 5.6 V reference with tighter than standard 5% tolerance is required. The MELF package offers superior mechanical stability compared to axial leads for automated assembly. Consider the 0.5 W power rating against expected load currents to ensure thermal limits are not exceeded during continuous operation.

Part Context

This part belongs to the 1N4678 through 1N4717 series of 0.5 W Zener diodes manufactured by Microchip Technology. The series covers a voltage range from 1.8 V to 43 V. The UR-1 suffix specifically denotes a surface-mount version with internal metallurgical bonding, aligning with military-grade reliability requirements for similar axial counterparts.

Replacement Considerations

Direct substitutes include other 5.6 V Zener diodes in the DO-213AA package with ±2% tolerance. Verify that replacement parts support the same 175 °C maximum operating temperature and metallurgical bond construction if environmental ruggedness is critical.