1N4105UR/TR

Single Zener Diodes Overview

The Microchip Technology 1N4105UR/TR is a 0.5-watt glass surface mount Zener voltage regulator in the DO-213AA package. It provides an 11V nominal Zener voltage with a standard ±5% tolerance. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 8.44 µA at 25°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA MELF-style surface mount package
• Internal metallurgical bond construction for high reliability
• Minimal capacitance characteristics suitable for sensitive circuits
• Inherently radiation hard design

Single Zener Diodes Applications

• Voltage regulation in broad operating current ranges
• High-reliability aerospace and defense electronics
• Radiation-hardened circuit protection

Single Zener Diodes Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm exact electrical tolerances and termination finishes. Confirm RoHS compliance status if required by project specifications, as availability varies by manufacturing lot. Ensure the TR suffix indicates tape and reel packaging compatible with automated assembly equipment.

Single Zener Diodes Selection Notes

Select this component when a surface mount equivalent to the axial-leaded 1N4105 is required. Consider the 0.5W power dissipation limit and thermal resistance values for PCB layout. Verify that the 11V breakdown voltage aligns with the target circuit requirements and that the DO-213AA footprint matches the board design.

Single Zener Diodes Part Context

This part belongs to the 1N4099UR through 1N4135UR series of 0.5-watt Zener diodes manufactured by Microsemi (now Microchip Technology). These devices are designed as surface mount replacements for JEDEC registered axial-leaded counterparts, offering hermetic sealing and internal metallurgical bonding for enhanced durability in harsh environments.

Single Zener Diodes Replacement Considerations

Direct surface mount equivalents include the MLL4105. Axial-leaded replacements such as the 1N4105 may require mechanical adaptation. Military qualified variants like the 1N4105UR-1 offer internal metallurgical bonds but differ in qualification level.