AZ23B56-G3-18

Overview

The Vishay AZ23B56-G3-18 is a dual common anode silicon planar Zener diode in an SOT-23 package. It provides a nominal Zener voltage of 56 V with a ±2% tolerance, tested at 0.5 mA. The device features a maximum reverse leakage current of 42 µA and dynamic resistance values of 135 Ω at the test current and 425 Ω at 2 mA. Operating within a temperature range of -55 °C to +150 °C, it dissipates up to 300 mW on an FR-4 board. The part is RoHS compliant, halogen-free, and utilizes green commercial grade materials.

Feature Summary

• Dual common anode configuration for space-efficient circuit designs
• High ESD protection capability exceeding 8 kV (HBM) and 800 V (MM)
• Tight voltage tolerance of ±2% for precision regulation applications

Applications

• Voltage reference circuits requiring stable dual polarity or logic level shifting
• Overvoltage protection stages utilizing the common anode topology
• Signal clamping in high-density surface mount assemblies

Procurement Notes

Verify the specific suffix G3-18 confirms the 10,000-unit reel packaging format. Ensure the B designation matches the required ±2% voltage tolerance rather than the standard C grade. Confirm RoHS compliance and material categorization details against the latest Vishay documentation before finalizing orders.

Selection Notes

Select this component when a dual common anode Zener configuration is necessary to save board space. The 56 V rating suits mid-range voltage regulation tasks. Verify that the 0.5 mA test current aligns with the target application's biasing requirements and that the 300 mW power dissipation limit accommodates the thermal environment.

Part Context

This part belongs to the AZ23-G series of small signal Zener diodes manufactured by Vishay Semiconductors. The series offers a wide voltage range from 2.2 V to 75 V in the compact SOT-23 package. The 'B' suffix indicates the tighter ±2% tolerance variant, while the 'G3-18' suffix denotes the specific tape and reel packaging format.

Replacement Considerations

Cross-reference with other AZ23B56 variants for different packaging options. Check equivalent dual common anode Zener diodes from other manufacturers if supply constraints exist, ensuring matching voltage, tolerance, and package dimensions.