1N4679/TR

Overview

The Microchip Technology 1N4679/TR is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 2 V with a tolerance of ±5%. The device is rated for a power dissipation of 500 mW and operates within an ambient temperature range of -65 °C to +175 °C. Packaged in the DO-35 (DO-204AA) axial through-hole format, it exhibits a maximum reverse leakage current of 5 µA at a test current of 50 µA.

Feature Summary

• Provides stable voltage regulation at a low 2 V reference level
• Capable of handling 500 mW power dissipation in a compact glass package
• Engineered for high-temperature reliability up to 175 °C

Applications

• Low-voltage reference circuits
• Voltage clamping and protection stages
• Over-voltage protection in sensitive electronic systems

Procurement Notes

Verify that the specific order includes the /TR suffix to confirm the tape-and-reel packaging configuration, as bulk packaging variants exist for this part number. Ensure compatibility with RoHS regulations if required, noting that standard versions may carry non-RoHS designations depending on the manufacturing batch and specific distributor listing.

Selection Notes

Select this component when a precise 2 V regulation point is required in space-constrained designs utilizing axial leads. Consider the 500 mW thermal limit and ensure adequate heat dissipation. Verify that the ±5% voltage tolerance meets the circuit requirements, as tighter tolerances are not available in this standard series.

Part Context

This component belongs to the industry-standard 1N467x series of low-power Zener diodes. Manufactured by Microchip Technology, it utilizes a hermetically sealed glass DO-35 package to ensure environmental stability. The device is widely recognized for its consistent performance in general-purpose discrete semiconductor applications requiring reliable voltage referencing.

Replacement Considerations

Cross-reference with other manufacturers' 1N4679 equivalents such as those from Vishay or Central Semiconductor. Verify that substitute parts maintain the same DO-35 footprint, 2 V Zener voltage, and 500 mW power rating to ensure mechanical and electrical compatibility without redesigning the PCB layout.