1N5527DUR-1/TR

Overview

The Microchip Technology 1N5527DUR-1/TR is a low voltage avalanche Zener diode with a nominal breakdown voltage of 7.5 V at a test current of 1 mA. It features a tight voltage tolerance of ±1% and operates within a steady-state power dissipation rating of 0.5 W. The device utilizes a hermetically sealed DO-213AA (MELF) glass surface mount package and includes an internal metallurgical bond. Qualified per MIL-PRF-19500/437, it supports junction temperatures from -65°C to +175°C.

Feature Summary

• Hermetically sealed glass MELF package with internal metallurgical bond for enhanced reliability
• Qualified to JAN, JANTX, and JANTXV military standards under MIL-PRF-19500/437
• Inherently radiation hard and nonsensitive to electrostatic discharge
• Minimal capacitance characteristics suitable for high-frequency applications

Applications

• Voltage regulation in harsh environments requiring radiation hardness
• Precision reference circuits utilizing tight voltage tolerances
• Military and aerospace electronic systems
• High-reliability surface mount power supply designs

Procurement Notes

Verify the specific suffix configuration against the datasheet nomenclature to ensure correct tolerance and qualification levels. Confirm RoHS compliance status as it varies by commercial grade availability. Check tape and reel specifications if ordering the TR variant. Ensure compatibility with the specified MELF footprint dimensions during PCB layout.

Selection Notes

Select this component when strict voltage accuracy and radiation hardness are required in a surface mount form factor. The D suffix indicates a ±1% tolerance, offering higher precision than standard commercial variants. Consider the thermal resistance values and derating curves for high-temperature operation scenarios.

Part Context

This part belongs to the 1N5518BUR-1 through 1N5546BUR-1 series of low voltage avalanche Zener diodes manufactured by Microchip Technology. The series provides a wide selection of voltages from 3.3 V to 33 V with various tolerance options. These devices are designed for applications demanding high reliability and robust performance in extreme conditions.

Replacement Considerations

Consult the manufacturer's documentation for direct qualified substitutes within the same MIL-PRF-19500/437 family. Verify that any alternative component matches the DO-213AA package dimensions and metallurgical bond construction to maintain environmental sealing integrity.