1N4566A

Single Zener Diodes Overview

The Microchip Technology 1N4566A is a temperature-compensated Zener reference diode with a nominal voltage of 6.4 V and a maximum temperature coefficient of 0.005 %/°C. It operates at a test current of 0.5 mA, features a maximum reverse current of 2 µA at 3 V, and has a maximum dynamic impedance of 200 Ohms. The device is housed in a hermetically sealed glass DO-7 (DO-204AA) axial-leaded package.

Single Zener Diodes Feature Summary

• Temperature compensated design for minimal voltage change over broad operating ranges
• Internal metallurgical bonding for structural integrity
• Hermetically sealed glass case construction

Single Zener Diodes Applications

• Instrumentation requiring stable voltage references
• Circuit designs demanding low temperature drift
• Military qualification applications via JAN/JANTX prefixes

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin, as the datasheet identifies Microsemi Scottsdale Division while other sources list Microchip Technology. Confirm the package type matches the required DO-7 form factor. Ensure the temperature coefficient tolerance aligns with the 0.005 %/°C specification. Check for military qualification prefixes if environmental ruggedness is required.

Single Zener Diodes Selection Notes

Select this component when a precise 6.4 V reference with tight temperature stability is needed. The 0.5 mA test current offers lower power dissipation compared to higher current variants. Verify that the 200 Ohm dynamic impedance meets the circuit's noise and regulation requirements. Consider the -55°C to +100°C operating range for environmental suitability.

Single Zener Diodes Part Context

This part belongs to the 1N4565 through 1N4584A series of zero-TC reference diodes. These devices provide various temperature coefficients ranging from 0.01%/°C to 0.0005%/°C. The series supports multiple operating currents including 0.5 mA, 1.0 mA, 2.0 mA, and 4.0 mA to suit different power and stability needs.

Single Zener Diodes Replacement Considerations

Substitutes within the same series include 1N4565A, 1N4567A, 1N4568A, and 1N4569A. These alternatives offer different temperature coefficients or operating currents while maintaining the 6.4 V nominal voltage and DO-7 package.