1N5228B

Single Zener Diodes Overview

The Microchip Technology 1N5228B is a 0.5 W glass axial-lead Zener diode in the DO-35 package. It provides a nominal Zener voltage of 3.9 V with a ±5% tolerance (B suffix). The device operates at a test current of 20 mA, featuring a maximum reverse leakage current of 10 µA and a Zener impedance of 23 Ω. It withstands operating temperatures from -65°C to +175°C and includes a negative temperature coefficient of -0.060 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance for high-frequency applications
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• Clamping applications

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as this component was originally JEDEC registered by Microsemi and is now produced under Microchip Technology. Confirm that the part number matches the exact electrical parameters required, specifically the 3.9 V nominal voltage and 5% tolerance indicated by the B suffix. Ensure the package type corresponds to the standard glass axial-lead DO-35 configuration.

Single Zener Diodes Selection Notes

Select this component when a precise 3.9 V reference is needed within a low-power design. The 500 mW power dissipation rating supports steady-state operation at lead temperatures below 50°C. Consider the negative temperature coefficient for thermal stability requirements. Verify if military screening prefixes or RoHS-compliant suffixes are necessary for the specific application environment.

Single Zener Diodes Part Context

This device belongs to the popular 1N5221 through 1N5281B series of 0.5 watt Zener Voltage Regulators. The series offers a wide selection of voltages ranging from 2.4 to 200 volts. These components utilize a hermetically sealed axial-lead glass DO-35 package, providing flexible mounting terminals and reliable performance in various electronic systems.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF style package. For higher power requirements, consult factory options for other Zener products.