AZ23B68-HE3_A-18

Overview

The Vishay AZ23B68-HE3_A-18 is a dual common anode silicon planar Zener diode array housed in an SOT-23 package. It features a nominal Zener voltage of 68 V with a tight tolerance of ±2%. The device operates within a temperature range of -55 °C to +150 °C and dissipates up to 300 mW on an FR-4 board. It is AEC-Q101 qualified, ensuring compliance with automotive reliability standards.

Feature Summary

• Dual common anode configuration for space-efficient circuit designs
• AEC-Q101 qualification for automotive-grade reliability
• High ESD protection capability exceeding 8 kV (HBM) and 800 V (MM)
• RoHS-compliant manufacturing process

Applications

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

Procurement Notes

Verify the specific ordering code suffix against official documentation to confirm tape-and-reel packaging quantities and RoHS compliance status. Ensure that the procurement channel sources directly from authorized distributors to guarantee authenticity and traceability of the AEC-Q101 qualification data.

Selection Notes

Select this component when a dual Zener array with high precision is required in a compact surface-mount footprint. The ±2% tolerance makes it suitable for applications demanding strict voltage accuracy. Verify thermal management requirements, as power dissipation drops significantly at elevated ambient temperatures above 75 °C.

Part Context

This part belongs to the Vishay AZ23 series of small signal Zener diodes. The 'B' designation indicates the tighter ±2% voltage tolerance compared to the standard 'C' grade. The 'HE3_A' suffix denotes the lead-free, halogen-free variant that meets AEC-Q101 automotive qualification standards.

Replacement Considerations

Direct replacements must match the SOT-23-3 package, dual common anode configuration, and 68 V nominal voltage. Verify that any substitute also holds AEC-Q101 qualification if used in automotive contexts. Check dynamic resistance and leakage current specifications to ensure circuit performance parity.

FAQ

What is the maximum reverse leakage current for the AZ23B68-HE3_A-18?

The maximum reverse leakage current is specified as 51 μA at a reverse voltage of 51 V.

How does the power dissipation rating change with ambient temperature?

The device can dissipate up to 300 mW on an FR-4 board, but this rating decreases linearly as the ambient temperature rises above approximately 75 °C due to thermal limitations.

What is the dynamic resistance of this Zener diode at the test current?

The dynamic resistance (ZZ) at the test current of 2 mA is typically 200 Ω.