1EZ190D2/TR12

Overview

The Microsemi Corporation 1EZ190D2/TR12 is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 190 V with a tight tolerance of ±2%. The device is rated for a maximum power dissipation of 1 W and utilizes a DO-204AL (DO-41) axial-leaded plastic package. It operates within a junction temperature range of -65°C to 150°C and exhibits a maximum impedance of 1700 Ohms.

Feature Summary

• Provides precise voltage regulation with a ±2% tolerance designation.
• Utilizes a robust plastic encapsulated DO-41 axial leaded construction.
• Capable of operation at high DC currents or full power ratings with adequate heat sinking.

Applications

• Voltage regulation in electronic circuits
• Protection against overvoltage conditions
• Reference voltage generation

Procurement Notes

Verify the specific suffix 'D2' confirms the ±2% tolerance variant, as standard commercial versions often default to ±5% ('D5') or ±10% ('D10'). Confirm RoHS compliance status, as non-e3 suffixes typically indicate leaded tin/lead terminals which may not meet current environmental directives. Ensure the TR12 tape and reel packaging matches automated assembly requirements.

Selection Notes

Select this component when a stable 190 V reference is required with tighter accuracy than standard ±5% parts offer. The 1 W power rating necessitates thermal management considerations for continuous operation. Verify that the DO-41 through-hole package fits the target PCB layout constraints compared to surface-mount alternatives.

Part Context

This part belongs to the Microsemi 1EZ series of 1 Watt Zener diodes. This family provides a wide selection of voltages from 110 V to 200 V in the same DO-41 plastic package. Variations in the suffix number dictate the voltage tolerance, allowing designers to choose between standard and tighter specifications without changing the physical footprint.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Equivalent replacements must be sourced by matching the 190 V Zener voltage, 1 W power rating, ±2% tolerance, and DO-41 package dimensions.