1N5266A

Single Zener Diodes Overview

The Microchip Technology 1N5266A is a 0.5 W glass axial-lead Zener diode in the DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 68 V with a ±10% tolerance. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse leakage current of 100 µA at 52 V. Electrical characteristics include a test current of 1.8 mA, a maximum Zener impedance of 230 Ω, and a voltage temperature coefficient of +0.097 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for reliable operation
• Capable of regulating 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 suffix 'A' confirms the 10% tolerance requirement. Confirm that the standard lead finish meets solderability standards if RoHS compliance is not required. Ensure the procurement specification matches the DO-35 package dimensions and thermal resistance parameters for the intended mounting configuration.

Single Zener Diodes Selection Notes

Select this component when a 68 V reference is needed with moderate precision. The DO-35 package supports through-hole mounting. Verify that the power dissipation requirements do not exceed 0.5 W without derating. Consider the positive temperature coefficient for thermal stability analysis in the target application environment.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener diodes manufactured by Microsemi (now Microchip Technology). The series covers a voltage range from 2.4 V to 200 V. The 'A' suffix specifically denotes a ±10% voltage tolerance, distinguishing it from the tighter tolerances offered by other suffixes like 'B', 'C', or 'D'.

Single Zener Diodes Replacement Considerations

Direct substitutes include the 1N5266B for tighter tolerance requirements. Other variants in the series such as 1N5265 or 1N5267 offer different voltage ratings but share similar packaging and power characteristics.

Single Zener Diodes FAQ

What is the voltage temperature coefficient for the 1N5266A?

The voltage temperature coefficient is +0.097 %/°C.

How is polarity indicated on the 1N5266A?

Polarity is indicated by a band on the cathode end of the glass body.