1N4581/TR

Single Zener Diodes Overview

The Microchip Technology 1N4581/TR is a temperature-compensated Zener reference diode with a nominal voltage of 6.4 V and a test current of 4.0 mA. It features a maximum temperature coefficient of 0.005 %/°C (0.32 mV/°C) and a maximum dynamic impedance of 25 Ω at the specified test current. The device operates within a temperature range of -55°C to +100°C, has a maximum reverse current of 2 µA at 3 V, and is housed in a DO-7 axial leaded package.

Single Zener Diodes Feature Summary

• Temperature compensated design for minimal voltage change over operating ranges
• Nominal 6.4 V reference voltage with tight tolerance options
• Internal metallurgical bond construction for reliability

Single Zener Diodes Applications

• Instrumentation requiring stable voltage references
• Precision circuit designs sensitive to temperature variations
• Military qualification applications via JAN/JANTX prefixes

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements against the datasheet before ordering. The TR suffix indicates tape and reel packaging per EIA-296 standards. Confirm that the standard JEDEC registration meets project specifications, as military qualifications require additional prefixes such as JAN or JANTX. Ensure the operating current aligns with the 4.0 mA specification for optimal stability.

Single Zener Diodes Selection Notes

Select this component when a 6.4 V reference with low temperature drift is required. The 4.0 mA test current distinguishes it from lower-current variants in the series. Verify that the DO-7 package fits the board layout constraints. Consider tighter tolerance suffixes if the standard 5% voltage accuracy is insufficient for the application.

Single Zener Diodes Part Context

This part belongs to the 1N4565 through 1N4584A series of Zero-TC Reference Diodes manufactured by Microsemi/Microchip. These devices are designed to provide stable voltage references across broad temperature ranges. The series includes various operating currents and temperature coefficients to suit different precision requirements.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 6.4 V temperature-compensated Zener diodes from manufacturers like STMicroelectronics or ON Semiconductor. Verify pinout compatibility and thermal characteristics when substituting. Military equivalents may require JAN or JANTX prefixes depending on qualification needs.