1N5228A

Single Zener Diodes Overview

The Microchip Technology 1N5228A is a 0.5 W glass axial-lead Zener diode with a nominal voltage of 3.9 V and ±10% tolerance. It operates within a temperature range of -65°C to +175°C, featuring a maximum reverse current of 75 µA at 3.0 V and a Zener impedance of 1900 Ω at 0.25 mA. The device utilizes a DO-35 (DO-204AH) hermetically sealed package with tin-lead or RoHS-compliant matte-tin plating.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for environmental stability
• Inherently radiation hard per MicroNote 050
• Minimal capacitance characteristics suitable for high-frequency applications
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage regulation in industrial environments
• Reference voltage sources in aerospace systems
• Overvoltage protection circuits

Single Zener Diodes Procurement Notes

Verify the specific suffix 'A' confirms the required ±10% tolerance level. Confirm that the ordering suffix matches the desired lead finish, such as tin-lead or RoHS-compliant matte-tin plating. Ensure the package designation aligns with the DO-35 form factor requirements for your assembly process.

Single Zener Diodes Selection Notes

Select this component when a stable 3.9 V reference is needed with moderate tolerance. Consider the negative temperature coefficient for thermal compensation needs. Evaluate the high Zener impedance against circuit loading requirements. Verify compatibility with the specified operating temperature range.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series provides a broad selection from 2.4 to 200 volts. The 'A' suffix specifically denotes a standard 10% voltage tolerance, distinguishing it from tighter tolerance variants like the 'B' or 'C' suffixes.

Single Zener Diodes Replacement Considerations

Equivalent parts include the MLL5228B surface mount variant in the DO-213AA MELF package. Other JEDEC registered equivalents may be sourced from different manufacturers provided they meet the 3.9 V, 500 mW, and DO-35 package specifications.