1EZ190DE3/TR8

Overview

The Microsemi Corporation 1EZ190DE3/TR8 is a single silicon Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 190V with a maximum power dissipation of 1W. The device utilizes a DO-204AL (DO-41) axial through-hole package, measuring approximately 5.21mm in length and 2.72mm in height. Key electrical characteristics include a reverse leakage current of 500nA at 144.8V and a forward voltage drop of 1.2V at 200mA. It operates within a temperature range of -65°C to +150°C and carries an MSL rating of 1.

Feature Summary

• Provides stable voltage regulation using a single unidirectional silicon junction structure.
• Capable of handling high reverse voltages up to the specified nominal breakdown level.
• Constructed with a plastic epoxy body suitable for standard axial lead mounting.

Applications

• Voltage clamping in electronic circuits
• Overvoltage protection for sensitive components
• Reference voltage generation

Procurement Notes

Verify the specific suffix 'E3' indicates lead-free compliance status against official manufacturer documentation, as legacy Microsemi data may vary. Confirm the 'TR8' packaging designation matches required reel specifications. Check for End-of-Life (EOL) notifications from Microsemi or its successor entity, as many devices in this series have reached obsolescence. Ensure the component meets RoHS requirements if mandated by the target application environment.

Selection Notes

Select this component when a precise 190V regulation point is required in a through-hole design. Compare the 1W power rating against expected thermal loads to ensure adequate heat dissipation without derating. Evaluate the ±20% tolerance if tighter voltage accuracy is needed, considering alternative precision variants. Verify that the DO-204AL footprint aligns with existing PCB layouts and that the operating temperature range covers the environmental extremes of the deployment site.

Part Context

This part belongs to the Microsemi 1EZ series of general-purpose Zener diodes. These components are widely used in industrial and commercial electronics for basic voltage stabilization. The series typically offers various voltage ratings within the same physical package family, allowing designers to maintain consistent mechanical layouts while adjusting electrical parameters. Microsemi has since been acquired by Microchip Technology, which continues to manage the product lifecycle.

Replacement Considerations

Consult official cross-reference lists for direct replacements such as the 1EZ190D variant, noting potential differences in tolerance or packaging. Verify compatibility with equivalent parts from other manufacturers offering 190V, 1W Zener diodes in DO-204AL packages. Ensure any substitute maintains the same pinout and thermal characteristics.