2EZ190D2E3/TR8

Single Zener Diodes Overview

The Microsemi Corporation 2EZ190D2E3/TR8 is a silicon Zener diode with a nominal voltage of 190 V and a ±2% tolerance. It operates in a DO-41 axial leaded package, providing a steady-state power dissipation of 2 watts at lead temperatures below 60°C. The device features a maximum rated Zener current of 10 mA and a maximum surge current of 10 A. Electrical characteristics include a maximum Zener impedance of 2.6 ohms at the test current and a reverse leakage current of 0.25 µA at 144.8 V.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation within a tight ±2% tolerance band across a broad operating temperature range.
• Features flexible axial-lead mounting terminals suitable for through-hole PCB integration.
• Withstands high surge stresses and exhibits non-sensitivity to electrostatic discharge events.

Single Zener Diodes Applications

• Voltage reference circuits requiring stable high-voltage regulation
• Overvoltage protection stages in industrial electronics
• Power supply output regulation and clamping applications

Single Zener Diodes Procurement Notes

Verify that the component matches the specific 2% tolerance suffix (D2) rather than standard 5% or 10% variants. Confirm RoHS compliance via the e3 suffix and ensure tape-and-reel packaging compatibility with TR8 specifications during procurement processing.

Single Zener Diodes Selection Notes

Select this component when a 190 V Zener voltage with strict ±2% accuracy is required. Ensure the application can accommodate the thermal resistance of 45°C/W junction-to-lead and maintain adequate heat sinking to support the 2-watt steady-state power rating under continuous operation conditions.

Single Zener Diodes Part Context

This part belongs to the Microsemi 2EZ series of 2-watt silicon Zener diodes. The series spans voltages from 3.6 V to 200 V in the DO-41 plastic package. The D2 suffix specifically denotes the tighter ±2% tolerance option compared to the standard 5% or wider tolerances available in the same family.

Single Zener Diodes Replacement Considerations

Equivalent parts include other 190 V Zener diodes in the DO-41 package with matching 2 W power ratings and ±2% tolerance. Verify thermal derating curves and impedance specifications match the original design requirements before substitution.

Single Zener Diodes FAQ

What is the maximum surge current rating for this diode?

The maximum non-recurrent peak reverse surge current is 10 A with an 8.3 ms pulse width.

How is polarity indicated on the component?

Polarity is marked by a band on the cathode end; the diode must be operated with the banded end positive relative to the opposite end for Zener regulation.