1N4755AH

Overview

The 1N4755AH is a single Zener diode manufactured by Taiwan Semiconductor Corporation, designed for voltage regulation applications. It features a nominal Zener voltage of 43 V with a tolerance of ±5%. The device is rated for a power dissipation of 1 W and operates within a junction temperature range of -55°C to 150°C. Key electrical parameters include a maximum reverse leakage current of 5 µA at 32.7 V and a Zener impedance of 70 Ohms. It is housed in a DO-204AL (DO-41) through-hole package.

Feature Summary

• Provides stable voltage regulation with a 43 V nominal breakdown voltage
• Rated for 1 W power dissipation in a standard axial leaded package
• Low reverse leakage current of 5 µA ensures minimal standby power loss
• Automotive grade construction supports operation up to 150°C junction temperature

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in automotive electronics
• Power supply output regulation modules

Procurement Notes

Verify the specific suffix 'AH' confirms automotive grade qualification and 150°C rating when sourcing. Confirm package type is DO-204AL (DO-41). Check RoHS compliance status via official datasheet. Ensure supplier provides traceability documentation for automotive-grade components.

Selection Notes

Select this component when a 43 V Zener voltage is required with automotive reliability standards. The 1 W power rating suits moderate current regulation tasks. Compare leakage current specifications against circuit sensitivity requirements. Ensure thermal management supports the 150°C junction limit in enclosed environments.

Part Context

This part belongs to the 1N4755 series of Zener diodes produced by Taiwan Semiconductor Corporation. The 'AH' suffix typically denotes automotive grade qualification and enhanced temperature performance compared to standard industrial variants. It shares the same electrical core as the 1N4755A but meets stricter automotive reliability standards.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4755AH parts or equivalent 43 V 1 W Zener diodes in DO-41 packages. Verify that replacement parts meet the same 150°C junction temperature and automotive grade requirements. Cross-reference pinout and physical dimensions for compatibility.