1N4485US/TR

Single Zener Diodes Overview

The Microchip Technology 1N4485US/TR is a surface mount Zener voltage regulator with a nominal breakdown voltage of 68V. It features a hermetically sealed voidless glass package and operates within a junction temperature range of -65°C to +175°C. The device dissipates up to 1.5W at 25°C ambient temperature, with a thermal resistance of 20°C/W from junction to end cap. Standard tolerance is ±5%, while tighter tolerances are available via suffixes.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless hard glass construction with tungsten slugs
• Internal metallurgical bonds for robust mechanical integrity
• Triple-layer passivation for enhanced protection
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020

Single Zener Diodes Applications

• High-reliability applications where failure cannot be tolerated
• Voltage regulation over broad operating current and temperature ranges
• Radiation-hardened environments due to inherent radiation hardness

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as this affects qualification standards. Confirm RoHS compliance status, noting that compliant versions are commercial grade only. Check datasheet specifications for exact test currents and impedance values relevant to your circuit design before ordering.

Single Zener Diodes Selection Notes

Select based on required Zener voltage, power dissipation needs, and environmental conditions. Ensure the chosen tolerance matches system requirements, as standard parts offer 5% while others provide 1% or 2%. Consider the MELF package dimensions and polarity band marking for PCB layout compatibility.

Single Zener Diodes Part Context

This component belongs to the 1N4460US–1N4496US series of 1.5-watt glass Zener diodes. These devices are industry-recognized equivalents to JEDEC registered series but offer superior hermetic sealing. They are designed for military-grade performance in surface mount configurations.

Single Zener Diodes Replacement Considerations

Direct replacements include other variants within the 1N4460US–1N4496US series if voltage ratings differ. For through-hole equivalents, consider the 1N4460–1N4496 axial-lead series. Verify package compatibility and electrical characteristics when substituting.