1EZ170D2E3/TR8

Overview

The Microsemi Corporation 1EZ170D2E3/TR8 is a single silicon Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 170 V with a tight tolerance of ±2%. The device is rated for a maximum power dissipation of 1 W and utilizes the DO-204AL (DO-41) axial through-hole package. Electrical characteristics include a reverse leakage current of 500 nA at 130.4 V and a forward voltage drop of 1.2 V at 200 mA. The component operates within a temperature range of -65°C to 150°C and complies with RoHS standards.

Feature Summary

• Provides precise voltage regulation with a nominal 170 V breakdown voltage and ±2% tolerance.
• Capable of handling up to 1 W of power dissipation in a standard axial leaded package.
• Operates reliably across an extended industrial temperature range from -65°C to 150°C.

Applications

• Voltage reference circuits requiring stable high-voltage biasing
• Overvoltage protection stages in power supply designs
• Clamping applications in analog signal conditioning

Procurement Notes

Verify that the specific suffix E3 confirms RoHS compliance status, as historical Microsemi documentation indicates potential variations in environmental compliance between similar part numbers. Confirm the manufacturer source, as Microsemi assets were acquired by Microchip Technology; ensure the supplier provides valid traceability for this discontinued or legacy component series. Check for active obsolescence notices or last-time buy availability before finalizing procurement plans.

Selection Notes

Select this component when a stable 170 V reference is required with strict tolerance limits. The DO-204AL package suits designs needing robust through-hole mounting. Ensure the circuit can handle the specified 1 W power rating under worst-case thermal conditions. Compare against lower-tolerance variants if tighter voltage accuracy is needed, or higher-power packages if thermal management is constrained.

Part Context

This part belongs to the Microsemi 1EZ series of general-purpose Zener diodes. These components are widely used in discrete semiconductor applications for basic voltage regulation. The 'E3' suffix typically denotes lead-free/RoHS-compliant construction, distinguishing it from older non-compliant versions within the same electrical specification family.

Replacement Considerations

Direct substitutes include other 170 V, 1 W Zener diodes in the DO-41 package with ±2% tolerance, such as those from Vishay or ON Semiconductor. Verify that replacement parts match the 500 nA leakage specification and operate within the -65°C to 150°C range to maintain circuit performance equivalence.