1N5224A (DO-35)

Single Zener Diodes Overview

The Microsemi Corporation 1N5224A is a 0.5 W glass axial-lead Zener diode in the DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 2.8 V with a ±10% tolerance, indicated by the 'A' suffix. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 20 µA at 30 V. Electrical characteristics include a test current of 30 mA, a maximum Zener impedance of 100 Ω at 0.25 mA, and a voltage temperature coefficient of -0.080 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for reliable operation
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge (ESD)
• Minimal capacitance across operating voltages

Single Zener Diodes Applications

• Voltage regulation over broad operating current ranges
• Reference voltage sources in electronic circuits
• Overvoltage protection applications

Single Zener Diodes Procurement Notes

Verify that the specific part number includes the correct suffixes for required tolerances and compliance. Confirm whether RoHS compliant versions are needed, as standard parts may differ from those with the e3 suffix. Ensure the ordering prefix matches any necessary military screening levels if applicable to the project requirements.

Single Zener Diodes Selection Notes

Select this component when a low-voltage Zener reference near 2.8 V is required with a 10% tolerance. Consider the negative temperature coefficient for thermal stability analysis. Verify that the 0.5 W power dissipation rating meets the circuit's steady-state and peak load conditions without exceeding thermal limits.

Single Zener Diodes Part Context

This device belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators manufactured by Microsemi Scottsdale Division. The series covers a wide voltage selection from 2.4 V to 200 V in various tolerance grades. These components utilize a standard JEDEC registered numbering system for compatibility with legacy designs.

Single Zener Diodes Replacement Considerations

Equivalent devices include other manufacturers' 1N5224A variants or the 1N5224B for tighter 5% tolerance requirements. Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package.