1N5221BUR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N5221BUR-1/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 2.4 V at a test current of 20 mA. It operates within a power dissipation limit of 0.5 W and features a ±5% voltage tolerance. The device utilizes a hermetically sealed DO-213AA glass package with an internal metallurgical bond. Electrical characteristics include a maximum dynamic impedance of 30 Ohms, a reverse leakage current of 100 µA at 0.95 V, and a temperature coefficient of -0.085 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass surface mount package with internal metallurgical bonding
• Surface mount equivalent to the JEDEC registered 1N5221 series
• Inherently radiation hard per Microsemi documentation
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability electronic systems requiring radiation hardness
• Applications necessitating minimal capacitance and ESD robustness

Single Zener Diodes Procurement Notes

Verify that the specific order includes the TR suffix to confirm tape and reel packaging compliance with EIA-481-B standards. Confirm RoHS status as commercial grade versions are compliant while others may not be. Ensure MIL-PRF-19500 screening requirements are explicitly stated if military-grade reliability is required for the application.

Single Zener Diodes Selection Notes

Select this component when a surface mount solution matching the 1N5221 electrical profile is required. The BUR-1 designation guarantees a 5% voltage tolerance. Consider the DO-213AA package dimensions for PCB layout. Verify thermal derating curves against expected ambient temperatures to ensure the 0.5 W power rating remains within safe junction limits.

Single Zener Diodes Part Context

This part belongs to the 1N5221BUR-1 through 1N5281BUR-1 series of 0.5 watt Zener regulators. The series provides a surface mount alternative to traditional axial-leaded components. Variations in the series cover voltages from 2.4 V to 200 V with different tolerance suffixes available.

Single Zener Diodes Replacement Considerations

The 1N5221B-1 serves as the axial-leaded equivalent within the same product family.