1N4581A

Single Zener Diodes Overview

The Microchip Technology 1N4581A 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 4.0 mA, featuring a maximum reverse current of 2 µA at 3 V and a dynamic impedance of 25 Ω. The device is housed in a hermetically sealed glass DO-7 (DO-204AA) axial-leaded package, dissipating up to 500 mW. It supports an operating temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Temperature compensated design for minimal voltage change over broad operating ranges
• Internal metallurgical bonding within a hermetically sealed glass case
• Flexible axial-leaded mounting terminals compatible with standard through-hole processes

Single Zener Diodes Applications

• Instrumentation circuits 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 for military qualifications or tighter voltage tolerances when ordering. Confirm that the DO-7 package dimensions align with the target PCB layout. Ensure the operating current remains within specified limits to maintain optimal voltage-temperature stability during implementation.

Single Zener Diodes Selection Notes

Select this component for applications demanding high thermal stability near the 6.4 V reference point. Consider the 4.0 mA test current requirement for biasing networks. Evaluate the need for military-grade variants if environmental ruggedness is required, as standard versions lack specific military certifications without prefix modifications.

Single Zener Diodes Part Context

This part belongs to the 1N4565 through 1N4584A series of zero-TC reference diodes manufactured by Microsemi/Microchip. The series provides various temperature coefficients and test currents while maintaining a consistent 6.4 V nominal output. These devices are designed for high-reliability environments where precise voltage regulation is critical.

Single Zener Diodes Replacement Considerations

Direct substitutes include other parts within the 1N4565-1N4584A series with matching electrical characteristics. Verify compatibility if replacing with surface mount equivalents like the DO-213AA variant.