1N5221BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5221BUR-1 is a surface mount Zener voltage regulator in a DO-213AA package. It provides a nominal Zener voltage of 2.4 V at a test current of 20 mA with a maximum dynamic impedance of 30 Ohms. The device dissipates up to 0.5 W and operates within a junction temperature range of -65°C to +175°C. It features a hermetically sealed glass construction with an internal metallurgical bond.

Single Zener Diodes Feature Summary

• Hermetically sealed surface mount package with internal metallurgical bond
• Surface mount equivalent of 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
• Applications requiring minimal capacitance
• Radiation-hardened circuit designs

Single Zener Diodes Procurement Notes

Verify the specific part nomenclature against official datasheets to confirm tolerance, RoHS compliance status, and screening level. Ensure the ordering suffix matches the required reliability grade and packaging configuration before procurement.

Single Zener Diodes Selection Notes

Select this component for applications requiring a 2.4 V reference in a compact surface mount form factor. Consider the thermal resistance and power derating curves when designing for high ambient temperatures or limited board space.

Single Zener Diodes Part Context

This device belongs to the 1N5221BUR-1 through 1N5281BUR-1 series of 0.5 watt Zener voltage regulators. The series offers a surface mount alternative to the traditional axial-leaded JEDEC registered components, maintaining similar electrical characteristics in a smaller footprint.

Single Zener Diodes Replacement Considerations

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