1N4746AG/TR

Overview

The Microchip Technology 1N4746AG/TR is a single silicon Zener diode designed for voltage regulation applications. It features an 18 V nominal Zener voltage with a 5% tolerance and operates within a wide temperature range from -65°C to +175°C. The device is housed in the DO-213AB surface-mount package and supports a maximum power dissipation of 1 W. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 20 Ohms, and a test current of 10 mA.

Feature Summary

• Provides stable voltage regulation using high-reliability silicon technology
• Engineered for operation in extreme thermal environments up to 175°C
• Utilizes hermetic sealing for enhanced environmental protection

Applications

• High-reliability voltage reference circuits
• Overvoltage protection in aerospace systems
• Precision power supply regulation

Procurement Notes

Verify component authenticity through authorized channels due to potential counterfeits. Confirm RoHS compliance status as specific variants may differ. Ensure proper handling procedures are followed during storage and assembly to maintain device integrity and performance specifications.

Selection Notes

Select this component when high-temperature stability and hermetic sealing are required. Compare against standard commercial grades if cost reduction is prioritized over radiation hardness or extreme environment reliability. Verify package compatibility with existing PCB footprints.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. It represents a specialized variant optimized for rugged applications requiring strict adherence to military or industrial standards compared to general-purpose equivalents.

Replacement Considerations

Consult official substitution lists for verified alternatives. Generic replacements may lack hermetic sealing or extended temperature ratings.