AZ23B47-G3-18

Overview

The AZ23B47-G3-18 is a dual common anode silicon planar Zener diode array from the AZ23-G series, manufactured by Vishay General Semiconductor - Diodes Division. It provides two independent Zener diodes sharing a common anode terminal within a compact SOT-23 surface-mount package. The nominal Zener voltage is 47 V with a tight tolerance of ±2%. Electrical characteristics are defined at a test current of 2 mA, featuring a maximum reverse leakage current of 50 nA and a dynamic resistance of 97 Ω. The device operates reliably across 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 for efficient space-saving circuit designs
• High precision voltage regulation with ±2% tolerance grading
• Robust thermal performance supporting operation up to +150 °C
• Compliant with RoHS standards and utilizes green commercial grade materials

Applications

• Precision voltage reference circuits requiring dual channels
• Over-voltage protection stages in signal conditioning paths
• Clamping applications in high-density surface mount assemblies

Procurement Notes

Verify the specific ordering code suffix against official distributor catalogs to confirm reel specifications and tape dimensions. Ensure that the procurement documentation explicitly references the AZ23-G series datasheet to validate compliance with the stated electrical tolerances and material categorization requirements.

Selection Notes

Select this component when a dual Zener array with strict ±2% voltage accuracy is required in a minimal footprint. The SOT-23 package facilitates automated surface mounting, while the common anode topology simplifies biasing networks compared to discrete single-diode implementations.

Part Context

This part belongs to the broader AZ23-G family of small signal Zener diodes, which offers various voltage grades from 2.2 V to 75 V. The 'B' designation specifically indicates the tighter ±2% tolerance variant, distinguishing it from the standard ±5% 'C' grade devices within the same physical package and thermal profile.

Replacement Considerations

AZ23B47-E3-18

FAQ

What is the dynamic resistance of the AZ23B47-G3-18?

The dynamic resistance (ZZ) is specified as a maximum of 97 Ω when tested at the rated current of 2 mA.

How does the tolerance affect the Zener voltage range?

With a nominal voltage of 47 V and a ±2% tolerance, the actual Zener voltage will fall between 46.06 V and 47.94 V.

Is this component qualified for automotive applications?

While AEC-Q101 qualification is available for the AZ23-G series, it must be requested directly from the manufacturer and is not standard for all ordering codes.