1N5278BDO35TR

Single Zener Diodes Overview

The Microsemi Corporation 1N5278BDO35TR is a Zener diode with a nominal voltage of 170 V and a power dissipation rating of 0.5 W at 25°C. It features a standard tolerance of ±5% indicated by the B suffix, housed in a hermetically sealed glass DO-35 (DO-204AH) axial-lead package. The device operates within a temperature range of -65°C to +175°C and includes a TR suffix for tape and reel packaging per EIA-296 standards.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction
• Voltage regulation across broad operating current and temperature ranges
• Minimal capacitance characteristics
• Inherently radiation hard

Single Zener Diodes Applications

• Voltage regulation circuits
• Temperature compensation applications
• Reference voltage sources

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required JEDEC registration and tolerance specifications. Confirm the presence of the TR suffix indicates tape and reel packaging compliance with EIA-296 standards. Ensure the component meets the necessary environmental and screening requirements for the intended application environment.

Single Zener Diodes Selection Notes

Select this component when a 170 V Zener voltage with ±5% tolerance is required. Consider the DO-35 package for through-hole mounting and the specified thermal resistance values. Evaluate the maximum reverse current and impedance parameters against circuit stability requirements.

Single Zener Diodes Part Context

This component belongs to the 1N5221 through 1N5281B series of 0.5 watt Zener Voltage Regulators. The series provides a selection from 2.4 to 200 volts in standard tolerances. The B suffix specifically identifies the ±5% voltage tolerance variant within this extensive lineup.

Single Zener Diodes Replacement Considerations

Equivalent parts include 1N5278D for tighter 1% tolerance or 1N5278A for 10% tolerance. Surface mount equivalents are available as MLL5281B in the DO-213AA MELF style package.