1N4471/TR

Single Zener Diodes Overview

The Microchip Technology 1N4471/TR is a 1.5 W glass Zener diode with an 18 V nominal voltage and 11 Ohms dynamic impedance. It operates within a -65 °C to +175 °C temperature range, features a DO-41 axial package, and includes a 14 mA test current.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds
• Military qualification per MIL-PRF-19500/406 for high-reliability applications
• Triple-layer passivation and robust physical design

Single Zener Diodes Applications

• Voltage regulation in aerospace systems
• Defense electronics requiring radiation hardness
• High-reliability industrial circuits

Single Zener Diodes Procurement Notes

Verify the specific military qualification level (JAN, JANTX, JANTXV, or JANS) required for your application, as the base part number covers multiple reliability grades. Confirm RoHS compliance status if environmental regulations apply, noting that commercial versions may differ from qualified levels. Ensure the tape and reel packaging matches your automated assembly equipment specifications.

Single Zener Diodes Selection Notes

Select this component when a 1.5 W power rating and 18 V breakdown are necessary. The DO-41 package suits through-hole mounting, while surface mount alternatives exist in the D-5A MELF format. Consider tighter tolerance options if standard 5% variation exceeds circuit requirements.

Single Zener Diodes Part Context

This device belongs to the 1N4460–1N4496 series of industry-recognized Zener voltage regulators. The series provides extensive voltage selections from 3.3 V to 200 V. It is designed for environments where failure cannot be tolerated, offering inherent radiation hardness and non-sensitive ESD characteristics.

Single Zener Diodes Replacement Considerations

Equivalent parts include JAN1N4471, JANTX1N4471, JANTXV1N4471, and JANS1N4471. Surface mount equivalents are available in the 1N4471US series.