1N4474

Single Zener Diodes Overview

The Microchip Technology 1N4474 is a military-qualified, voidless hermetically sealed glass Zener diode with a nominal voltage of 24 V and a power dissipation rating of 1.5 W. It operates within a junction temperature range of -65 °C to +175 °C and features a DO-41 axial lead package. The device exhibits a maximum dynamic impedance of 16 Ohms at the test current of 10.5 mA, with a maximum reverse leakage current of 0.05 µA. Standard tolerance is 5%, while tighter tolerances are available via suffix codes.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using voidless hard glass with tungsten slugs for extreme robustness
• Qualified per MIL-PRF-19500/406 for high-reliability aerospace and defense applications
• Inherently radiation hard and non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• High-reliability aerospace and defense circuits
• Military-grade voltage regulation systems
• Harsh environment electronic protection

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as this dictates qualification standards. Confirm RoHS compliance status if applicable, noting that compliant versions are commercial grade only. Ensure the correct tolerance suffix is selected, as standard parts default to 5% without a suffix. Consult factory documentation for tape and reel availability.

Single Zener Diodes Selection Notes

Select the 1N4474 when a 24 V reference is needed in a 1.5 W axial lead package. Consider the DO-41 form factor for through-hole mounting. Evaluate thermal derating requirements based on ambient temperatures exceeding 25 °C. Verify that the 16 Ohm dynamic impedance meets the circuit's noise and stability specifications.

Single Zener Diodes Part Context

This component belongs to the 1N4460–1N4496 series of 1.5 W glass Zener diodes. The series covers a wide voltage range from 3.3 V to 200 V. All devices share identical mechanical packaging and hermetic sealing processes, differing primarily in breakdown voltage and associated electrical parameters like test current and impedance.

Single Zener Diodes Replacement Considerations

Direct replacements must match the 24 V nominal voltage, 1.5 W power rating, and DO-41 package. Military equivalents require matching MIL-PRF-19500/406 qualification levels. Commercial substitutes lack hermetic sealing and radiation hardness.