1N4480US

Single Zener Diodes Overview

The Microchip Technology 1N4480US is a surface mount Zener voltage regulator diode qualified to MIL-PRF-19500/406. It features a voidless hermetically sealed glass package with an internal metallurgical bond and triple-layer passivation. The nominal Zener voltage is 43.0 V at a test current of 6.0 mA, with a maximum dynamic impedance of 40 Ohms. Steady-state power dissipation is rated at 1.5 W at 25°C ambient temperature. The device operates within a junction and storage temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless hard glass construction with tungsten slugs for robust performance in high-reliability applications.
• Internal Category 1 metallurgical bonds ensure structural integrity and resistance to failure.
• Triple-layer passivation provides enhanced protection against environmental stressors.
• Inherently radiation hard design suitable for aerospace and defense environments.

Single Zener Diodes Applications

• High-reliability military and aerospace circuits where component failure is not tolerated.
• Voltage regulation over broad operating current and temperature ranges.
• Radiation-hardened electronic systems requiring stable breakdown characteristics.

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as this affects qualification standards. Confirm RoHS compliance status if mandated by project specifications, noting that compliant versions are available only on commercial grade parts. Ensure ordering suffixes match the desired tolerance and packaging configuration before finalizing procurement.

Single Zener Diodes Selection Notes

Select the 1N4480US when a 43.0 V Zener reference is needed in a surface mount form factor. Consider the 1.5 W power rating and thermal resistance values for heat dissipation requirements. Evaluate the 40 Ohm dynamic impedance for noise sensitivity in the target circuit. Verify that the -65°C to +175°C operating range aligns with the environmental conditions of the deployment site.

Single Zener Diodes Part Context

This component belongs to the 1N4460US through 1N4496US series of 1.5 Watt Zener diodes. These devices serve as surface mount equivalents to popular JEDEC registered axial-lead series. The series offers extensive voltage selections from 3.3 to 200 Volts with standard 5% tolerance, catering to diverse voltage regulation needs in industrial and military sectors.

Single Zener Diodes Replacement Considerations

Direct replacements include other 1N44xxUS series variants from Microchip Technology with matching voltage ratings. Cross-reference with equivalent MIL-PRF-19500/406 qualified components from other manufacturers if supply constraints exist. Ensure any substitute maintains the same MELF package dimensions and hermetic sealing requirements.