1N5527DUR-1

Overview

The 1N5527DUR-1 is a unidirectional Zener diode manufactured by Microchip Technology, designed for surface-mount applications. It features a DO-213AA (MLL34) package and operates with a nominal voltage of 7.5 V at a test current of 1 mA. The device has a maximum power dissipation of 0.5 W and offers a tight tolerance of ±1%. Key electrical characteristics include a dynamic impedance of 35 Ohms and a leakage current of 0.5 µA.

Feature Summary

• Provides precise voltage regulation with a tight ±1% tolerance for sensitive circuitry.
• Utilizes a hermetically sealed glass MELF package for robust environmental protection.
• Designed for surface-mount integration to support automated assembly processes.

Applications

• Precision voltage reference circuits
• Overvoltage protection in signal lines
• Clamping applications in high-reliability electronics

Procurement Notes

Verify the specific suffix UR-1 to confirm the ±1% tolerance and MLL34 package variant. Ensure compatibility with DO-213AA footprints during PCB layout. Confirm manufacturing origin and lot traceability requirements if used in regulated industries. Check for RoHS compliance status as some variants may differ.

Selection Notes

Select this component when high accuracy is required, as indicated by the ±1% tolerance compared to standard 5% or 10% Zener diodes. The DO-213AA package is suitable for space-constrained designs requiring hermetic sealing. Consider the 0.5 W power rating for thermal management in the final application environment.

Part Context

This part belongs to the 1N5527 series of Zener diodes, which are widely recognized for their reliability in military and aerospace applications. The 'UR' designation typically indicates a specific tolerance and packaging configuration within the Microchip portfolio, distinguishing it from standard commercial grade equivalents.

Replacement Considerations

Direct substitutes include JAN1N5527CUR-1 and JANTX1N5527BUR-1TR, which share similar electrical specifications and package types. Verify that replacement parts maintain the same ±1% tolerance and hermetic seal requirements to ensure functional equivalence in critical applications.