AZ23B22-HE3_A-18

Overview

The AZ23B22-HE3_A-18 is a silicon planar Zener diode array from the AZ23 series, manufactured by Vishay General Semiconductor - Diodes Division. It features a dual common anode configuration within a SOT-23 surface-mount package. The nominal Zener voltage is 22 V with a tight tolerance of ±2%. Electrical characteristics include a maximum reverse leakage current of 50 µA at 17 V and a dynamic resistance of 55 Ω at a test current of 5 mA. The device is AEC-Q101 qualified for automotive applications and operates within a temperature range of -55 °C to +150 °C.

Feature Summary

• Dual common anode Zener diode array in a compact SOT-23 package
• High precision ±2% Zener voltage tolerance
• Automotive grade qualification compliant with AEC-Q101 standards
• Robust electrostatic discharge protection exceeding 8 kV (HBM) and 800 V (MM)

Applications

• Voltage reference circuits requiring high stability
• Over-voltage protection stages in automotive electronics
• Clamping applications in signal conditioning paths

Procurement Notes

Verify the specific ordering code suffix against the manufacturer's official documentation to confirm tape-and-reel specifications and packaging dimensions. Ensure that the component selection aligns with the required thermal management constraints and operating temperature ranges defined in the datasheet.

Selection Notes

Select this variant when a precise 22 V reference with ±2% tolerance is required alongside AEC-Q101 compliance. The common anode topology allows for efficient space utilization in dense PCB layouts compared to discrete single diodes.

Part Context

This component belongs to the AZ23 series of small signal Zener diodes. The series offers a wide range of graded voltages from 2.2 V to 75 V. The 'B' designation indicates the tighter ±2% tolerance band, while the 'HE3_A' suffix denotes the RoHS-compliant, lead-free formulation suitable for automotive environments.

Replacement Considerations

AZ23B22-E3-18

FAQ

What is the dynamic resistance of the AZ23B22-HE3_A-18?

The dynamic resistance (ZZ) is specified as a maximum of 55 Ω at a test current (IZT1) of 5 mA.

Is the AZ23B22-HE3_A-18 suitable for automotive applications?

Yes, the HE3_A version is explicitly qualified according to the AEC-Q101 standard for automotive use.

What does the 'B' indicate in the part number AZ23B22?

The letter 'B' signifies that the Zener voltage tolerance is ±2%, providing higher precision than the standard ±5% ('C') variants.