1N4747AHR1G

Overview

The 1N4747AHR1G is a single silicon planar Zener diode manufactured by Taiwan Semiconductor. It operates in the DO-41 axial leaded package and provides a nominal Zener voltage of 20 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W at 25°C ambient temperature. Key electrical characteristics include a maximum reverse leakage current of 5 µA, a Zener impedance of 22 Ω, and a test current of 12.5 mA. It is qualified under AEC-Q101 standards for automotive applications and functions within a junction temperature range from -55°C to +150°C.

Feature Summary

• Automotive-grade reliability certified under AEC-Q101 standards
• Glass passivated junction for enhanced environmental stability
• Single unidirectional configuration for precise voltage regulation

Applications

• Voltage reference circuits in automotive electronics
• Overvoltage protection stages in vehicle control modules
• Clamping applications in industrial power supplies

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm that the specific suffix HR1G corresponds to the required reel packaging format. Ensure compliance with RoHS and REACH directives as specified in the technical datasheet before integration into production lines.

Selection Notes

Select this component when a stable 20 V reference is required in high-reliability environments. The DO-41 package suits through-hole mounting processes. Consider the 22 Ω dynamic impedance for noise-sensitive designs. Verify thermal management requirements to maintain operation within the specified junction temperature limits during continuous load conditions.

Part Context

This part belongs to the 1N4747AH series of power Zener diodes produced by Taiwan Semiconductor. The series utilizes silicon planar technology optimized for robust performance. The HR1G suffix indicates specific manufacturing and packaging attributes distinct from standard variants. It serves as a standardized solution for general-purpose voltage regulation tasks.

Replacement Considerations

Cross-reference with other manufacturers' 1N4747A equivalents ensuring identical 20 V rating and DO-41 footprint. Verify that substitute parts meet AEC-Q101 qualification if automotive usage is intended. Confirm matching Zener impedance and leakage current specifications to maintain circuit performance integrity.