1N5255B (DO-35)

Single Zener Diodes Overview

The Microsemi Corporation 1N5255B (DO-35) is a 0.5 W glass axial-lead Zener diode with a nominal voltage of 28 V and a ±5% tolerance. It operates within a temperature range of -65°C to +175°C, featuring a maximum reverse current of 100 µA at 20 V and a maximum Zener impedance of 44 Ω at a test current of 4.5 mA.

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 regulation in electronic circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the specific suffix letter against official datasheets to confirm the exact voltage tolerance and electrical characteristics. Ensure the package type matches the required mounting style. Confirm RoHS compliance status if environmental regulations apply to the intended application.

Single Zener Diodes Selection Notes

Select this component when a precise 28 V reference is needed with tight manufacturing tolerances. The DO-35 glass package offers robust thermal performance and reliable operation in harsh environments. Consider the power dissipation limits and derating curves for proper circuit design.

Single Zener Diodes Part Context

This device belongs to the popular 1N5221 through 1N5281B series of 0.5 watt Zener Voltage Regulators. The series provides a wide selection of voltages from 2.4 to 200 volts, available in standard 5% or 10% tolerances as well as tighter options identified by different suffix letters on the part number.

Single Zener Diodes Replacement Considerations

Equivalent parts include other manufacturers' 1N5255B variants in the DO-35 package. Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF style package.