1N5224BUR-1

Single Zener Diodes Overview

The Microchip Technology 1N5224BUR-1 is a surface mount Zener voltage regulator with a nominal breakdown voltage of 2.8 V at a test current of 20 mA. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 0.5 W. The device features a maximum dynamic impedance of 30 Ohms, a reverse leakage current of 75 µA at 1 V, and a forward voltage of 1.1 V at 200 mA. It utilizes a hermetically sealed DO-213AA (MELF) package.

Single Zener Diodes Feature Summary

• Hermetically sealed glass MELF package with internal metallurgical bond
• Surface mount equivalent to JEDEC registered axial-leaded series
• Inherently radiation hard per Microsemi specifications
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability aerospace and defense circuitry
• Harsh environment electronics requiring radiation hardness

Single Zener Diodes Procurement Notes

Verify the specific suffix letters on the part number to confirm the exact voltage tolerance required for the design. Confirm whether RoHS compliance is necessary, as commercial versions are available in compliant configurations while others may not be. Ensure the selected variant matches the required reliability level for the intended application environment.

Single Zener Diodes Selection Notes

Select this component when a ruggedized surface mount solution is needed that replaces traditional axial leads without sacrificing performance. The metallurgically bonded construction provides superior mechanical stability compared to standard epoxy packages. Consider the thermal resistance characteristics and 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, which covers Zener voltages from 2.4 V to 200 V. The series offers various tolerance options identified by suffix letters, allowing designers to choose between standard 5% or 10% tolerances and tighter 2% or 1% specifications based on circuit precision requirements.

Single Zener Diodes Replacement Considerations

The datasheet identifies the 1N5221B-1 thru 1N5281B-1 series as an alternative configuration available in axial-leaded DO-35 packages. Designers requiring through-hole mounting should verify compatibility with these specific part numbers instead of using the surface mount BUR-1 variants.