1N5228A (DO-35)

Single Zener Diodes Overview

The Microsemi Corporation 1N5228A (DO-35) is a silicon Zener diode with a nominal voltage of 3.9V and a ±10% tolerance, indicated by the 'A' suffix. It operates in a hermetically sealed glass DO-35 axial-lead package. The device provides a maximum power dissipation of 0.5 watts at 25°C, derating linearly above this temperature. Electrical characteristics include a maximum reverse current of 23 µA at 24V and a maximum Zener impedance of 10 Ohms at a test current of 20 mA. The component supports an operating and storage temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for environmental stability
• Voltage regulation capability across a broad operating current and temperature range
• Inherently radiation hard per MicroNote 050
• Minimal capacitance suitable for high-frequency applications

Single Zener Diodes Applications

• Precision voltage reference circuits
• Overvoltage protection stages
• General-purpose voltage regulation

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required JEDEC registration and tolerance class. Confirm the presence of the 'A' suffix for 10% tolerance if standard commercial grade is needed. Check for prefix identifiers such as MQ or MX if military screening levels are required. Ensure the package style corresponds to the DO-35 axial lead format specified in the datasheet.

Single Zener Diodes Selection Notes

Select this component when a stable 3.9V reference is required in a through-hole axial configuration. Consider the thermal resistance of 250 °C/W junction-to-lead when designing heat dissipation paths. Evaluate the minimum Zener impedance of 10 Ohms against circuit sensitivity requirements. Verify compatibility with soldering temperatures up to 260°C for 10 seconds during assembly.

Single Zener Diodes Part Context

This device belongs to the popular 1N5221 through 1N5281B series of 0.5 watt Zener Voltage Regulators manufactured by Microsemi's Scottsdale Division. The series offers a wide selection of voltages ranging from 2.4 to 200 volts. The 1N5228A specifically addresses the lower end of the voltage spectrum within this robust family of components.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package. For RoHS compliant versions, add the 'e3' suffix to the base part number.