AZ23B3V0-HE3_A-18

Overview

The AZ23B3V0-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 3.0 V with a tight ±2% tolerance and a maximum power dissipation of 300 mW on an FR-4 board. The device is AEC-Q101 qualified for automotive applications and offers high ESD protection exceeding 8 kV (HBM) and 800 V (MM). Electrical characteristics include a reverse leakage current of 1 µA maximum at 1 V and a dynamic impedance of 95 Ω at a test current of 5 mA.

Feature Summary

• Dual common anode configuration providing two independent Zener elements in a single compact package
• AEC-Q101 qualification ensuring reliability for demanding automotive electronic environments
• High electrostatic discharge robustness protecting sensitive circuit nodes
• RoHS-compliant manufacturing process utilizing lead-free materials

Applications

• Automotive voltage regulation and reference circuits
• ESD protection for data lines and input ports
• Clamping applications in consumer electronics
• Over-voltage protection in industrial control systems

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer's part number against official distribution channels. Confirm that the specific suffix matches the required automotive grade and tape-and-reel packaging specifications. Ensure compliance with RoHS directives and check for any recent product change notices affecting availability or material composition before finalizing procurement orders.

Selection Notes

Select this component when a precise 3.0 V reference is required alongside a secondary regulated rail within a constrained footprint. The dual common anode topology allows for efficient space utilization compared to discrete single diodes. Consider the ±2% tolerance for precision applications and verify that the 300 mW thermal rating aligns with the expected ambient operating conditions and PCB copper area.

Part Context

This device belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series encompasses a wide range of standard E24 Zener voltages from 2.2 V to 75 V. The 'B' designation indicates the tighter ±2% voltage tolerance variant, while the 'HE3_A' suffix denotes the automotive-grade, lead-free version packaged in 13-inch reels.

Replacement Considerations

Direct replacements must match the SOT-23-3 package, 3.0 V nominal voltage, and ±2% tolerance. Verify that alternative sources provide equivalent AEC-Q101 qualification if automotive usage is intended. Ensure the substitute maintains similar dynamic impedance and leakage current specifications to preserve circuit performance.

FAQ

What is the difference between the AZ23C3V0 and AZ23B3V0 designations?

The 'C' suffix indicates a standard ±5% Zener voltage tolerance, whereas the 'B' suffix specifies a tighter ±2% tolerance for higher precision requirements.

How does the HE3_A suffix differ from the standard E3 suffix?

The HE3_A suffix indicates that the device is AEC-Q101 qualified for automotive applications and utilizes Vishay's Green Molding compound, which is halogen-free and RoHS compliant.

What is the maximum power dissipation rating for this component?

The maximum power dissipation is 500 mW when mounted on a heatsink (RthJL = 250 K/W), but it is limited to 300 mW when mounted on a standard FR-4 board with the recommended soldering footprint.