AZ23B75-HE3_A-08

Overview

The Vishay AZ23B75-HE3_A-08 is a dual common anode silicon planar Zener diode array housed in an SOT-23 surface-mount package. It features a nominal Zener voltage of 75 V with a tight tolerance of ±2%. The device is AEC-Q101 qualified for automotive reliability and operates within a temperature range of -55 °C to +150 °C. Electrical characteristics include a maximum reverse leakage current of 56 μA at 71.25 V, a dynamic resistance (ZZ) of 250 Ω at the test current of 2 mA, and a power dissipation rating of 300 mW on an FR-4 board.

Feature Summary

• Dual common anode configuration providing two independent Zener channels in a single compact footprint
• Automotive-grade qualification compliant with AEC-Q101 standards for enhanced reliability
• High electrostatic discharge protection capability exceeding 8 kV via human body model

Applications

• Voltage reference circuits requiring precise dual-channel regulation
• Over-voltage protection stages in automotive electronic control units
• Signal clamping applications in high-reliability industrial equipment

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer's part number against official Vishay documentation. Confirm that the ordering suffix matches the specific tolerance and qualification requirements. Ensure the received components align with the specified SOT-23 package dimensions and marking codes before integration into production lines.

Selection Notes

Select this variant when a strict ±2% voltage tolerance is required for the 75 V breakdown level. The HE3_A suffix indicates RoHS compliance combined with AEC-Q101 automotive qualification. Consider the 250 Ω dynamic resistance and 56 μA leakage limits when designing low-current bias networks or high-impedance sensing interfaces.

Part Context

This component belongs to the Vishay AZ23 series of small signal Zener diodes. The series utilizes silicon planar technology and offers a wide range of standardized E24 voltage values. The AZ23B75-HE3_A-08 specifically represents the high-precision, automotive-qualified subset of this family, designed for demanding environments where standard commercial grade parts are insufficient.

Replacement Considerations

Direct replacements must match the SOT-23-3 package, 75 V nominal voltage, ±2% tolerance, and AEC-Q101 qualification. Verify that alternative manufacturers provide equivalent dynamic resistance and leakage specifications to ensure circuit performance parity without redesigning the surrounding bias network.