1N4581

Single Zener Diodes Overview

The Microchip Technology 1N4581 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 operates within a range of -55°C to +100°C. The device has a maximum reverse current of 2.0 µA at 3 V and a dynamic impedance of 25 Ω. It is housed in a hermetically sealed glass DO-7 (DO-204AA) axial-leaded package.

Single Zener Diodes Feature Summary

• Provides minimal voltage change over a broad operating temperature range for instrumentation and other circuit designs requiring a voltage reference
• Temperature coefficient selections available from 0.01%/ºC to 0.0005%/ºC
• Flexible axial-leaded mounting terminals
• Nonsensitive to ESD per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• Instrumentation circuits requiring stable voltage references
• Circuit designs demanding minimal voltage change over temperature
• Military qualification applications via JAN, JANTX, or JANTXV prefixes

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements for military qualifications (JAN, JANTX, JANTXV) or internal metallurgical bonding (-1) if needed. Confirm the operating temperature range matches the application, as standard versions operate up to +100°C while extended ranges may require specific variants. Ensure the DO-7 package dimensions align with the PCB layout constraints.

Single Zener Diodes Selection Notes

Select this component when a precise 6.4 V reference with low temperature drift is required. The 4.0 mA test current offers a balance between power dissipation and stability. Consider tighter tolerance options by adding percentage suffixes if higher voltage accuracy is necessary. Verify that the 500 mW power dissipation rating suits the thermal environment.

Single Zener Diodes Part Context

The 1N4581 belongs to the popular 1N4565 through 1N4584A-1 series of Zero-TC Reference Diodes. This series provides a selection of both 6.4 V nominal voltages and various temperature coefficients. These glass axial-leaded DO-7 reference diodes are internally metallurgical bonded and offer military qualifications.

Single Zener Diodes Replacement Considerations

Direct substitutes include other members of the 1N4565-1N4584A series with matching electrical characteristics. For military specifications, equivalents with JAN, JANTX, or JANTXV prefixes are available. Surface mount equivalents exist in the DO-213AA package with UR-1 suffixes.