1N4581A/TR

Single Zener Diodes Overview

The Microchip Technology 1N4581A/TR 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 4 mA, features a maximum reverse current of 2 µA at 3 V, and has a dynamic impedance of 25 Ω. The device dissipates 500 mW and functions within a temperature range of -65 °C to +175 °C. It utilizes a DO-7 glass axial-leaded package and is supplied in tape and reel format.

Single Zener Diodes Feature Summary

• Provides minimal voltage change over a broad operating temperature range for instrumentation applications
• Features internal metallurgical bonding for enhanced reliability
• Offers flexible axial-leaded mounting terminals

Single Zener Diodes Applications

• Instrumentation circuits requiring stable voltage references
• Circuit designs demanding low voltage drift across temperature variations
• Precision analog signal processing systems

Single Zener Diodes Procurement Notes

Verify the specific suffix 'TR' indicates tape and reel packaging rather than bulk supply. Confirm that the manufacturer designation aligns with Microchip Technology's acquisition of the original Microsemi product line. Ensure the component meets RoHS compliance requirements if applicable to your manufacturing standards. Cross-reference the JEDEC registration number with official datasheets to validate electrical characteristics.

Single Zener Diodes Selection Notes

Select this component when a 6.4 V reference with a 0.005 %/°C temperature coefficient is required. The 4 mA test current setting distinguishes it from lower current variants in the series. Consider the DO-7 package dimensions for through-hole layout constraints. Evaluate the 500 mW power dissipation capability against thermal management requirements in the target application environment.

Single Zener Diodes Part Context

This part belongs to the 1N4565 thru 1N4584A series of Zero-TC Reference Diodes. These devices are designed to provide stable voltage references with minimal temperature dependence. The series includes various temperature coefficients and test currents to suit different precision requirements. The 1N4581A variant specifically targets applications needing moderate stability at a 4 mA operating point.

Single Zener Diodes Replacement Considerations

Equivalent parts include JANTX1N4581AUR-1 for surface mount applications in DO-213AA packages. Other series members like 1N4580A or 1N4582A offer different temperature coefficients. Verify pinout compatibility and package dimensions before substituting with non-JEDEC registered equivalents.