AZ23B43-HE3_A-18

Overview

The AZ23B43-HE3_A-18 is a dual common-anode silicon planar Zener diode array from the Vishay AZ23 series, housed in an SOT-23 package. It features a nominal Zener voltage of 43 V with a tight tolerance of ±2%. The device operates within a junction temperature range of -55 °C to +150 °C and supports a maximum power dissipation of 300 mW on an FR-4 board. Key electrical parameters 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 designs
• High ESD protection capability exceeding 8 kV (HBM) and 800 V (MM)
• Automotive-grade qualification compliant with AEC-Q101 standards

Applications

• Automotive electronic systems requiring robust voltage regulation
• Multi-channel reference voltage generation
• ESD protection circuits in sensitive signal lines

Procurement Notes

Verify that the ordering suffix matches the required reel quantity and tape width specifications. Confirm RoHS compliance status and ensure the component meets specific automotive reliability requirements if deployed in vehicle electronics. Cross-reference datasheet revision dates to validate parameter accuracy.

Selection Notes

Select this variant when a precise ±2% voltage tolerance is mandatory for dual-channel applications. Ensure the design accommodates the 300 mW thermal dissipation limit on standard PCB footprints. Verify that the common-anode topology aligns with the intended circuit polarity and switching logic requirements.

Part Context

This part belongs to the AZ23 series of small-signal Zener diodes manufactured by Vishay Semiconductors. The series offers various voltage grades based on the E24 standard, packaged in compact SOT-23 housings. The HE3_A suffix specifically denotes AEC-Q101 qualification and RoHS compliance, distinguishing it from commercial grade variants.

Replacement Considerations

Direct substitutes within the same family include AZ23B43-E3-18 or AZ23B43-G3-18, provided automotive qualification is not strictly required. For single-diode applications, BZX84B43 variants may be considered if pinout compatibility allows.