1N4471

Single Zener Diodes Overview

The Microchip Technology 1N4471 is a military-qualified, voidless hermetically sealed glass Zener diode with a nominal voltage of 18 V and a standard tolerance of ±5%. It operates within a junction temperature range of -65 °C to +175 °C. The device dissipates up to 1.5 W at a lead temperature of +112 °C, featuring a dynamic impedance of 11 Ohms at a test current of 14 mA. Maximum reverse leakage current is limited to 0.05 µA, while the maximum continuous regulator current reaches 79 mA.

Single Zener Diodes Feature Summary

• Hermetically sealed construction utilizing voidless hard glass and internal metallurgical bonds for extreme robustness.
• Qualified per MIL-PRF-19500/406 standards, ensuring high reliability in critical applications.
• Inherently radiation-hardened design suitable for demanding environments.
• Non-sensitive to electrostatic discharge (ESD) as verified by MIL-STD-750 method 1020.

Single Zener Diodes Applications

• High-reliability aerospace systems
• Military-grade electronic circuits
• Radiation-hardened equipment

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required reliability level (JAN, JANTX, JANTXV, or JANS). Confirm RoHS compliance status if applicable, noting it is available on commercial grades only. Ensure the package type aligns with the intended mounting configuration before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when strict adherence to MIL-PRF-19500/406 qualification is mandatory. The 1.5 W power rating supports broad operating currents. Verify thermal derating requirements against the application's ambient conditions to ensure steady-state dissipation limits are not exceeded during operation.

Single Zener Diodes Part Context

This part belongs to the 1N4460–1N4496 series of industry-recognized Zener voltage regulators. The series provides extensive selections from 3.3 to 200 volts. These components utilize flexible axial-lead terminals and feature triple-layer passivation for enhanced environmental protection.

Single Zener Diodes Replacement Considerations

Direct replacements include other parts within the 1N4460–1N4496 series that share identical electrical characteristics and MIL-PRF-19500/406 qualifications. Surface mount equivalents are available in the D-5A MELF package format under the US suffix designation.