1N4112DUR-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4112DUR-1/TR is a 500 mW Zener voltage regulator in the surface mount DO-213AA package. It features a nominal Zener voltage of 18 V with a 1% tolerance, tested at 250 µA. The device exhibits a maximum dynamic impedance of 100 Ohms and a reverse current of 13.7 µA. It operates within a temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-213AA MELF style package with internal metallurgical bond
• Qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS reliability levels
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability applications requiring radiation hardness
• Surface mount circuits requiring hermetic sealing

Single Zener Diodes Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for the application, as the base part number covers multiple qualification tiers. Confirm that the TR suffix indicates tape and reel packaging per EIA-481-1-A standards. Ensure compatibility with the specified soldering temperatures and thermal derating curves during assembly.

Single Zener Diodes Selection Notes

Select this component when a precise 18 V reference is needed in a surface mount form factor. The 1% tolerance offers tighter voltage control than standard 5% variants. Consider the low noise density specification for sensitive analog circuits. Verify that the 500 mW power dissipation rating meets the thermal requirements of the target environment.

Single Zener Diodes Part Context

This device belongs to the 1N4099UR-1 through 1N4135UR-1 series of 500 mW metallurgically bonded glass surface mount Zener diodes. These components serve as surface mount equivalents to JEDEC registered axial-leaded series, providing hermetic sealing and high reliability for demanding electronic environments.

Single Zener Diodes Replacement Considerations

Commercial versions are available with the CDLL prefix, such as CDLL4112-1. Axial-leaded equivalents include the 1N4112-1 in the DO-35 package. Surface mount alternatives exist in the 1PMT series using the DO-216 tabbed package.