1N5267BDO35

Single Zener Diodes Overview

The Microsemi 1N5267BDO35 is a 0.5-watt glass axial-lead Zener diode with a nominal voltage of 75 volts and a ±5% tolerance, indicated by the 'B' suffix. It operates within a temperature range of -65°C to +175°C and features a hermetically sealed DO-35 package. The device exhibits a maximum reverse current of 270 µA at 75 volts and a zener impedance of 1700 ohms at a test current of 270 mA. It is RoHS compliant (e3 suffix) and inherently radiation hard.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction in a DO-35 package
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge
• Minimal capacitance characteristics

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage sources in electronic circuits
• Overvoltage protection applications

Single Zener Diodes Procurement Notes

Verify that the part number includes the e3 suffix for RoHS compliance and DO35 designation for the specific package style. Confirm the B suffix indicates the required 5% voltage tolerance. Ensure the ordering prefix matches any necessary military screening levels if applicable, as standard commercial versions lack these prefixes.

Single Zener Diodes Selection Notes

Select this component when a 75-volt reference with tight 5% tolerance is required in a high-reliability environment. The DO-35 package suits through-hole mounting. Consider the positive temperature coefficient above 5 volts and the specific thermal resistance values for PCB layout. Verify that the power dissipation requirements align with the 0.5-watt rating at ambient temperatures below 50°C.

Single Zener Diodes Part Context

This device belongs to the 1N5221 through 1N5281B series of 0.5-watt Zener regulators. The series offers voltages from 2.4 to 200 volts with various tolerance options. The 1N5267 variant specifically targets the 75-volt segment, providing stable regulation for mid-range voltage applications requiring axial-lead packaging.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package. DO-7 glass body axial-leaded equivalents are also offered. Verify pin compatibility and thermal performance when substituting with these variants.

Single Zener Diodes FAQ

What is the temperature coefficient for the 1N5267B?

The maximum voltage temperature coefficient is +0.098 %/°C.

How is polarity identified on the device?

The cathode is indicated by a band on the glass body. The diode must be operated with the banded end positive with respect to the opposite end for Zener regulation.