1N4471C

Single Zener Diodes Overview

The Microchip Technology 1N4471C is a 1.5 W glass Zener diode with an 18 V nominal voltage and ±2% tolerance. It features a maximum dynamic impedance of 11 Ohms at a test current of 14 mA, with a reverse leakage current of 50 nA. The device operates within a temperature range of -65 °C to +175 °C and utilizes a DO-41 (DO-204AL) axial lead package.

Single Zener Diodes Feature Summary

• Military qualified to MIL-PRF-19500/406 for high-reliability applications
• Voidless hermetically sealed glass construction with internal metallurgical bonds
• Triple-layer passivation for robust protection

Single Zener Diodes Applications

• Voltage regulation in military-grade circuits
• High-reliability power supply reference stages
• Protection against voltage transients in aerospace systems

Single Zener Diodes Procurement Notes

Verify the specific suffix 'C' indicates the ±2% tolerance variant. Confirm the manufacturer source, as Microsemi was acquired by Microchip Technology. Ensure compliance with MIL-PRF-19500/406 standards if military qualification is required for the application.

Single Zener Diodes Selection Notes

Select this component when a precise 18 V reference with tight ±2% tolerance is needed in harsh environments. The hermetic glass package supports operation up to 175 °C. Consider surface-mount equivalents like the 1N4471CUS if board space constraints require a MELF configuration.

Single Zener Diodes Part Context

This part belongs to the industry-standard 1N4460 through 1N4496 series of 1.5 W Zener diodes. The 'C' suffix specifically denotes the tighter 2% voltage tolerance compared to the standard 5% version. These devices are widely used in critical infrastructure where failure is not an option.

Single Zener Diodes Replacement Considerations

Direct substitutes include JAN1N4471CUS or 1N4471CUS from Microchip/Microsemi. Generic replacements must match the 18 V Zener voltage, 1.5 W power rating, and DO-41 package form factor.