1EZ190D/TR8

Overview

The Microsemi Corporation 1EZ190D/TR8 is a single silicon Zener diode housed in the DO-204AL (DO-41) axial leaded plastic package. It provides a nominal Zener voltage of 190 V with a maximum power dissipation rating of 1 W and a tolerance of ±20%. The device operates within a temperature range of -65°C to +150°C, featuring a maximum reverse leakage current of 500 nA at 144.8 V and a forward voltage drop of 1.2 V at 200 mA. Its maximum impedance is specified at 1700 Ohms.

Feature Summary

• Provides stable voltage regulation for high-voltage applications using a robust silicon junction.
• Features an isolated case connection suitable for mounting on insulated heat sinks or chassis.
• Designed for through-hole installation with flexible axial-lead terminals.

Applications

• High-voltage DC power supply regulation
• Voltage reference circuits requiring wide operating ranges
• Overvoltage protection stages

Procurement Notes

Verify component authenticity due to the discontinued status of this part number. Confirm that the specific suffix matches the required tolerance and packaging format. Ensure compliance with RoHS regulations as the standard version is non-compliant. Validate supplier documentation against official Microsemi obsolescence notices before finalizing procurement decisions.

Selection Notes

Select this component when a 190 V regulation point is required in a standard axial package. Consider the ±20% tolerance and high impedance characteristics for circuit stability. Evaluate thermal management requirements given the 1 W power rating and extended temperature capabilities.

Part Context

This component belongs to the Microsemi 1EZ series of general-purpose Zener diodes. These devices are designed for broad industrial use, offering reliable performance across extreme temperatures. The series utilizes a standardized DO-204AL footprint common in legacy and rugged electronics designs.

Replacement Considerations

Public confirmed substitute part numbers were not identified in available documentation. Verify compatibility with equivalent 190 V, 1 W Zener diodes from other manufacturers if sourcing alternatives.