1EZ170D2/TR12

Overview

The 1EZ170D2/TR12 is a single Zener diode manufactured by Microsemi Corporation, designed for voltage regulation and protection 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 operates within an extended temperature range from -65°C to +150°C. Packaged in the DO-204AL (DO-41) axial through-hole format on a tape and reel, it offers low reverse leakage current of 500 nA at 144.8 V and a Zener impedance of 1.45 kOhms.

Feature Summary

• Provides precise voltage regulation with a narrow ±2% tolerance for stable reference applications
• Engineered for high-temperature reliability with operation up to 150°C junction temperature
• Utilizes a robust DO-204AL axial package suitable for automated through-hole assembly processes

Applications

• Precision voltage reference circuits requiring stable DC levels
• Over-voltage protection stages in sensitive electronic systems
• Clamping applications in industrial control environments

Procurement Notes

Verify component authenticity due to discontinuation status. Confirm RoHS compliance requirements as specific variants may not meet current environmental standards. Ensure the tape and reel packaging matches production line specifications. Validate that the ±2% tolerance variant meets circuit design constraints before integration.

Selection Notes

Select this component when strict voltage accuracy is required compared to standard ±5% or ±10% Zener diodes. The high-temperature rating makes it suitable for harsh industrial environments where standard silicon devices might fail. Consider the axial leaded package for manual prototyping or legacy board designs requiring through-hole mounting rather than surface mount alternatives.

Part Context

This part belongs to the Microsemi 1EZ series of single Zener diodes, known for military-grade quality and reliability. The 'D2' suffix specifically denotes the ±2% tolerance version, distinguishing it from other tolerance grades like D10 (±10%). The TR12 suffix indicates the specific tape and reel packaging configuration used for automated manufacturing.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status and specific ±2% tolerance requirement, direct pin-compatible replacements must be sourced from official Microchip/Microsemi channels or verified equivalents with matching electrical characteristics.