1N5266B

Single Zener Diodes Overview

The Microchip Technology 1N5266B is a 0.5 W glass axial-lead Zener diode in the JEDEC registered 1N5221 to 1N5281B series, housed in a DO-35 package. It provides a nominal Zener voltage of 68 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 100 µA at 50 V. Electrical characteristics include a test current of 1.8 mA, a dynamic impedance of 230 Ω at 0.25 mA, and a voltage temperature coefficient of +0.097 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for reliable operation
• Regulates voltage 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

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin, as this component has been produced by both Microsemi and Microchip Technology. Confirm that the part number suffix matches the required tolerance (B indicates ±5%) and packaging style. Ensure compliance with any specific military screening requirements if applicable to the design.

Single Zener Diodes Selection Notes

Select this component when a precise 68 V reference is needed in a through-hole configuration. Consider the positive temperature coefficient for thermal stability analysis. Verify that the 0.5 W power dissipation rating meets the circuit's thermal requirements under derating conditions.

Single Zener Diodes Part Context

This device belongs to the widely used 1N5221 through 1N5281B series of 0.5 W Zener diodes. The series offers an extensive selection of voltages from 2.4 V to 200 V. The 'B' suffix specifically denotes a tighter ±5% voltage tolerance compared to the standard A suffix.

Single Zener Diodes Replacement Considerations

Equivalent parts include other manufacturers' 1N5266B devices meeting the same electrical specifications. Surface mount equivalents are available in the MLL5266B series using the DO-213AA MELF package.