AZ23B18-E3-18

Overview

The AZ23B18-E3-18 is a dual common-anode silicon planar Zener diode array from Vishay, housed in an SOT-23 surface-mount package. It provides two independent voltage regulation channels with a nominal Zener voltage of 18 V and a tight tolerance of ±2%. The device operates at a test current of 5 mA per channel, dissipating up to 300 mW on a printed circuit board. Key electrical characteristics include a maximum reverse leakage current of 50 nA and a dynamic resistance of 45 Ω. It supports an operating temperature range from -55 °C to +150 °C.

Feature Summary

• Dual-channel configuration featuring a shared common anode for simplified circuit design
• High precision voltage grading with ±2% tolerance for stable reference applications
• Robust electrostatic discharge protection exceeding 8 kV via human body model standards

Applications

• Precision voltage reference circuits requiring dual regulated rails
• Overvoltage protection stages for sensitive input lines
• Signal conditioning and clamping in industrial control systems

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging quantity and tape specifications. Ensure that the component meets RoHS compliance requirements for your manufacturing process. Cross-reference the manufacturer's part number with authorized distributors to validate authenticity and traceability before finalizing procurement orders.

Selection Notes

Select this component when dual voltage regulation is required within a minimal footprint. The ±2% tolerance makes it suitable for applications demanding tighter voltage accuracy than standard commercial grades. Verify that the thermal dissipation capabilities align with the ambient operating conditions of the target enclosure.

Part Context

This device belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series offers a wide range of standardized voltage options in the compact SOT-23 package. The 'B' designation indicates the tighter voltage tolerance grade compared to the standard 'C' grade variants.

Replacement Considerations

AZ23B18-E3-08