1N4755AHR1G

Overview

The 1N4755AHR1G is a single silicon Zener diode manufactured by Taiwan Semiconductor, designed for voltage regulation applications. It features a nominal Zener voltage of 43 V with a tolerance of 5%. The device is housed in the DO-204AL (DO-41) axial lead package and supports through-hole mounting. It has a maximum power dissipation of 1 W at 25°C and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 5 µA and a Zener impedance of 70 Ohms at a test current of 6 mA. The component holds AEC-Q101 qualification.

Feature Summary

• Glass passivated junction construction for enhanced stability
• AEC-Q101 qualified for automotive reliability standards
• Built-in strain relief in the DO-41 package
• Low inductance design suitable for high-frequency circuits

Applications

• Voltage reference circuits in automotive electronics
• Overvoltage protection in vehicle power systems
• Clamping applications in automotive control modules
• General-purpose voltage regulation in industrial equipment

Procurement Notes

Verify the specific suffix HR1G to confirm AEC-Q101 automotive qualification and reel packaging configuration. Ensure compatibility with RoHS directives and halogen-free requirements as specified in the datasheet. Confirm that the DO-41 package dimensions match the target PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a 43 V regulated voltage is required in an automotive or harsh environment application. The AEC-Q101 certification ensures suitability for automotive-grade designs requiring high thermal stability up to 200°C. Compare the 70 Ohm impedance against circuit sensitivity requirements to ensure adequate regulation performance under varying load conditions.

Part Context

This part belongs to the 1N47xxA series of glass-passivated Zener diodes from Taiwan Semiconductor. The series covers a wide voltage range from 3.3 V to 100 V. The HR1G suffix indicates automotive qualification and specific tape-and-reel packaging, distinguishing it from standard bulk-packaged variants in the same family.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4755A parts in the DO-41 package. Verify that replacement components meet the same 43 V nominal voltage, 5% tolerance, and 1 W power rating. Ensure any alternative also satisfies AEC-Q101 requirements if the original automotive qualification is critical to the design.