1N4746AHB0G

Overview

The 1N4746AHB0G is a single Zener diode manufactured by Taiwan Semiconductor, designed for voltage regulation applications. It features a nominal Zener voltage of 18 V with a tolerance of ±5%. The device is housed in a DO-41-2 through-hole package and supports a maximum power dissipation of 1 W. Key electrical characteristics include a test current of 14 mA, a maximum reverse leakage current of 5 µA, and a Zener impedance of 20 Ohms. It operates within a temperature range of -55°C to +150°C and holds AEC-Q101 qualification.

Feature Summary

• Provides stable voltage regulation with a nominal 18 V output.
• Constructed in a hermetically sealed glass axial leaded package for durability.
• Qualified for automotive electronics under the AEC-Q101 standard.

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Reference voltage sources

Procurement Notes

Verify component authenticity and supply chain integrity directly with Taiwan Semiconductor or authorized distributors. Confirm that the specific suffix matches the required AEC-Q101 automotive qualification and DO-41-2 packaging configuration. Ensure compliance with RoHS and REACH directives as specified in the official datasheet before finalizing procurement orders.

Selection Notes

Select this component when an 18 V reference is required in a through-hole design. The 1 W power rating allows for moderate current handling. Verify that the 20 Ohm impedance meets circuit stability requirements. The AEC-Q101 certification makes it suitable for automotive environments where higher reliability standards are mandated compared to general industrial components.

Part Context

This part belongs to the 1N4746AH series of Zener diodes from Taiwan Semiconductor. It shares core specifications with the standard 1N4746A but includes specific suffixes indicating automotive qualification (AEC-Q101) and specific packaging variations. It serves as a robust solution for low-voltage regulation tasks requiring high reliability.

Replacement Considerations

Cross-reference with other manufacturers' 1N4746A equivalents such as those from Microchip Technology or Central Semiconductor. Ensure that any substitute maintains the 18 V nominal voltage, 1 W power rating, and DO-41 package dimensions to guarantee mechanical and electrical compatibility.