1N4471DUS/TR

Single Zener Diodes Overview

The Microchip Technology 1N4471DUS/TR is a surface mount Zener voltage regulator with an 18 V nominal breakdown voltage and 1% tolerance. It operates in the D-5A (MELF) package, dissipating up to 1.5 W at 25 °C ambient temperature. The device features a test current of 14 mA, dynamic impedance of 650 Ohms, and reverse leakage current of 5 µA at 14.4 V. It withstands junction temperatures from -65 °C to +175 °C.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for robust reliability.
• Military qualification available per MIL-PRF-19500/406 standards.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• High-reliability applications where failure cannot be tolerated
• Voltage regulation over broad operating current and temperature ranges
• Radiation-hardened circuit designs

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required military qualification level and RoHS compliance status. Confirm the package type corresponds to the D-5A MELF form factor. Ensure the tolerance designation aligns with the 1% specification requirement for the target application.

Single Zener Diodes Selection Notes

Select this component when high reliability and radiation hardness are critical requirements. The 1% tolerance provides tighter voltage control compared to standard 5% variants. Verify thermal management capabilities against the 1.5 W steady-state power dissipation rating and derating curves.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of 1.5 Watt glass Zener diodes. These devices serve as surface mount equivalents to popular JEDEC registered axial-lead series, offering hermetic sealing and robust construction for demanding environments.

Single Zener Diodes Replacement Considerations

Direct replacements include other 1N4471 variants within the same series, such as JANTXV1N4471US/TR or commercial grade versions, provided the package and tolerance specifications match the design requirements.