AZ23C43-HE3_A-18

Overview

The AZ23C43-HE3_A-18 is a dual common anode silicon planar Zener diode array from the Vishay AZ23 series, housed in a SOT-23 surface-mount package. It features a nominal Zener voltage of 43 V with a ±5% tolerance and a maximum power dissipation of 300 mW on an FR-4 board. The device operates within a temperature range of -55 °C to +150 °C and carries AEC-Q101 automotive qualification. Electrical characteristics include a reverse leakage current of 50 nA at 32 V and a dynamic resistance of 97 Ω at a test current of 2 mA.

Feature Summary

• Dual common anode configuration for space-efficient circuit design
• AEC-Q101 qualified for automotive reliability standards
• ESD protection exceeding 8 kV via human body model

Applications

• Automotive electronic circuits requiring robust voltage regulation
• General-purpose voltage reference applications
• Overvoltage protection in signal conditioning paths

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer's part number against official Vishay documentation. Confirm that the HE3_A suffix indicates AEC-Q101 qualification and RoHS compliance. Ensure the ordering code matches the specific voltage and tolerance requirements before finalizing procurement actions.

Selection Notes

Select this variant when a dual common anode topology is required alongside strict automotive reliability standards. The C designation provides a standard 5% voltage tolerance suitable for general regulation tasks. Verify that the 300 mW thermal rating aligns with the expected ambient operating conditions and PCB footprint constraints.

Part Context

This component belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series offers a wide range of graded voltages according to the E24 standard. The HE3_A suffix specifically denotes the automotive-grade version compliant with AEC-Q101, distinguishing it from commercial grade variants.

Replacement Considerations

Direct replacements must maintain the dual common anode configuration, SOT-23 package, and AEC-Q101 qualification. Verify that substitute parts meet the 43 V nominal voltage requirement and possess equivalent or superior thermal and electrical specifications.