AZ23B6V8-HE3_A-18

Overview

The AZ23B6V8-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 6.8 V with a tight ±2% tolerance and a maximum dynamic resistance of 8 Ω at a test current of 5 mA. The device is AEC-Q101 qualified for automotive reliability and offers high ESD protection exceeding 8 kV (HBM) and 800 V (MM). It operates within a temperature range of -55 °C to +150 °C and dissipates up to 300 mW on standard FR-4 boards.

Feature Summary

• Dual common anode configuration providing two independent Zener elements in a single compact surface-mount package.
• AEC-Q101 qualification ensuring compliance with rigorous automotive electronic component standards.
• High electrostatic discharge robustness rated above 8 kV via human body model and 800 V via machine model.
• RoHS-compliant manufacturing utilizing the HE3_A suffix to denote enhanced thermal and environmental performance.

Applications

• Automotive circuitry requiring precise voltage regulation under strict AEC-Q101 reliability standards.
• Protection of sensitive input/output lines against transient overvoltage events and ESD strikes.
• Reference voltage generation in low-power analog signal processing applications.

Procurement Notes

Verify that the ordering code explicitly includes the HE3_A suffix to confirm AEC-Q101 qualification and RoHS compliance. Ensure the B designation is present to guarantee the required ±2% Zener voltage tolerance. Confirm the trailing 18 indicates the 10,000-unit reel packaging format before finalizing procurement orders.

Selection Notes

Select this specific part when a dual Zener array with a 6.8 V breakdown is required alongside automotive-grade reliability. The ±2% tolerance makes it suitable for precision circuits where tighter voltage control is necessary compared to standard commercial grade devices. Verify that the 300 mW power dissipation rating aligns with the thermal constraints of the target PCB layout.

Part Context

This component belongs to the broader AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series spans a wide voltage range from 2.2 V to 75 V and utilizes the standardized SOT-23 footprint. The AZ23B6V8-HE3_A-18 represents the intersection of high-precision voltage grading and automotive qualification within this extensive product family.

Replacement Considerations

Direct replacements must match the 6.8 V nominal voltage, dual common anode topology, and SOT-23-3 package. Verify that any substitute also meets AEC-Q101 requirements if the application demands automotive certification. Cross-reference dynamic resistance and leakage current specifications to ensure functional equivalence in the target circuit design.

FAQ

What does the 'B' designation indicate in the part number?

The 'B' indicates a Zener voltage tolerance of ±2%, which is stricter than the standard ±5% tolerance found in the 'C' graded variants.

Is this component suitable for harsh automotive environments?

Yes, the HE3_A suffix confirms that the device is AEC-Q101 qualified and designed to withstand the thermal and operational stresses typical of automotive applications.

How is the dual configuration wired internally?

The device contains two Zener diodes connected in a common anode configuration, allowing them to share a single positive terminal while maintaining separate cathode outputs.