1EZ170D/TR8

Overview

The Microsemi Corporation 1EZ170D/TR8 is a single Zener diode designed for through-hole mounting in the DO-204AL (DO-41) axial package. It features a nominal Zener voltage of 170 V with a tolerance of ±20% and a maximum power dissipation of 1 W. The device operates within a temperature range of -65°C to +150°C. Key electrical characteristics include a reverse leakage current of 500 nA at 137 V and a forward voltage drop of 1.2 V at 1 A. The component has a moisture sensitivity level of 1 (unlimited).

Feature Summary

• Provides stable voltage regulation at 170 V for circuit protection applications.
• Capable of handling high operating temperatures up to 150°C.
• Utilizes a robust DO-204AL axial leaded package for reliable through-hole integration.

Applications

• Voltage reference circuits requiring 170 V stabilization.
• Over-voltage protection stages in industrial electronics.
• Clamping applications in high-voltage power supplies.

Procurement Notes

Verify component authenticity as this part is marked as obsolete by the manufacturer. Confirm availability from authorized distributors or surplus suppliers. Ensure the specific suffix TR8 matches the required tape-and-reel packaging format. Check for RoHS compliance status, as older Microsemi parts may not meet current environmental directives. Validate datasheet revisions before final design implementation.

Selection Notes

Select this component when a 170 V Zener voltage with ±20% tolerance is required in a DO-204AL package. Consider the 1 W power rating and 150°C junction temperature limit for thermal management. Evaluate if the wide tolerance meets the precision requirements of the target application compared to tighter tolerance alternatives.

Part Context

This component belongs to the Microsemi Zener diode family, specifically the 1EZ series designed for general-purpose voltage regulation. The 1EZ170D variant provides a specific 170 V breakdown voltage point within this lineup. The TR8 suffix indicates the standard reel packaging configuration used for automated assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the part is obsolete, engineers must identify equivalent components based on matching voltage, power, and package specifications from other manufacturers.