1N4485US

Single Zener Diodes Overview

The Microchip Technology 1N4485US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 68V and a maximum dynamic impedance of 100 Ohms. It features a 1.5W steady-state power dissipation rating, operates within a junction temperature range of -65°C to +175°C, and utilizes a voidless hermetically sealed glass package.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds
• Military qualification per MIL-PRF-19500/406 for high-reliability environments
• Inherently radiation hard design
• ESD non-sensitive per MIL-STD-750 method 1020

Single Zener Diodes Applications

• High-reliability military systems
• Voltage regulation in harsh environments
• Radiation-hardened circuit protection

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as these levels are available under this part family designation. Confirm RoHS compliance status if environmental regulations apply, noting that commercial grade versions may differ from qualified military grades. Ensure the ordering suffix matches the desired tolerance and packaging configuration.

Single Zener Diodes Selection Notes

Select the 1N4485US when a 68V Zener reference is needed in a surface mount form factor. The device offers a standard 5% tolerance by default; tighter tolerances require specific suffixes. Consider the 1.5W power rating and thermal resistance characteristics for heat dissipation planning in enclosed assemblies.

Single Zener Diodes Part Context

This component belongs to the 1N4460US through 1N4496US series of voidless hermetically sealed surface mount Zener diodes. These devices serve as the surface mount equivalents of popular JEDEC registered axial-lead series, providing robust performance in compact PCB layouts while maintaining high reliability standards.

Single Zener Diodes Replacement Considerations

Direct replacements include other variants within the 1N4460US–1N4496US series or the equivalent DO-41 axial lead packages (1N4460–1N4496). Verify that substitute parts match the required military qualification level and package dimensions for proper fitment.

Single Zener Diodes FAQ

What is the maximum operating junction temperature?

The maximum operating junction temperature is +175°C.

Is the device sensitive to electrostatic discharge?

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