1N4472US

Single Zener Diodes Overview

The Microchip Technology 1N4472US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 20.0 V and a maximum steady-state power dissipation of 1.5 W at 25 °C ambient temperature. It operates within a junction and storage temperature range of -65 °C to +175 °C. The device features a maximum dynamic impedance of 12 Ohms at the test current of 12.5 mA, a maximum reverse leakage current of 0.05 µA at 16 V, and a maximum continuous Zener current of 71 mA. It utilizes a voidless hermetically sealed glass package.

Single Zener Diodes Feature Summary

• Hermetically sealed void-less glass construction with internal metallurgical bonds for high reliability.
• Qualified per MIL-PRF-19500/406 for military-grade applications where failure cannot be tolerated.
• Inherently radiation hard as described in Microsemi MicroNote 050.
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 method 1020.

Single Zener Diodes Applications

• High-reliability aerospace and defense circuits
• Military-grade voltage regulation systems
• Radiation-hardened electronic designs

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required qualification level (JAN, JANTX, JANTXV, or JANS). Confirm RoHS compliance status if applicable, noting that commercial versions may differ from military specifications. Ensure the requested tolerance aligns with the standard 5% specification unless a tighter tolerance suffix is explicitly ordered.

Single Zener Diodes Selection Notes

Select this component when a 1.5 W surface mount Zener diode with a 20 V nominal breakdown is required. Consider the D-5A MELF package dimensions for PCB layout constraints. Evaluate the thermal resistance characteristics against the expected operating environment to ensure the junction temperature remains within the specified -65 °C to +175 °C range during operation.

Single Zener Diodes Part Context

This part belongs to the 1N4460US through 1N4496US series of industry-recognized 1.5 W Zener voltage regulators. These devices serve as surface mount equivalents to popular JEDEC registered axial-lead series, offering robust construction and extensive voltage selection from 3.3 to 200 volts in various tolerance levels.

Single Zener Diodes Replacement Considerations

Direct replacements include other parts within the 1N4460US–1N4496US series that share identical electrical parameters and package type. Verify that any substitute maintains the same MIL-PRF-19500/406 qualification level and hermetic sealing requirements for critical applications.

Single Zener Diodes FAQ

What is the maximum forward voltage of the 1N4472US?

The maximum forward voltage is 1.0 V at 200 mA and 1.5 V at 1.0 A.

Is the 1N4472US sensitive to electrostatic discharge?

No, the device is non-sensitive to ESD per MIL-STD-750 method 1020.