AZ23B20-E3-18

Overview

The AZ23B20-E3-18 is a dual common anode Zener diode array manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 20 V with a tight tolerance of ±2%. The device operates within a test current range of 2 to 5 mA and exhibits a maximum reverse leakage current of 0.05 µA at 15 V. Electrical characteristics include a dynamic resistance (ZZ) of 50 Ω and a temperature coefficient ranging from 8 to 10 x 10⁻⁴/°C. Rated for a maximum power dissipation of 300 mW on an FR-4 board, it supports an operating temperature range of -55 °C to +150 °C and is housed in a compact SOT-23 surface-mount package.

Feature Summary

• Dual common anode configuration providing two independent Zener channels in a single package
• High precision ±2% Zener voltage tolerance for accurate reference applications
• Robust thermal performance supporting up to 300 mW power dissipation on standard PCB footprints
• Extended operational reliability across a wide temperature range from -55 °C to +150 °C

Applications

• Precision voltage reference circuits requiring stable dual outputs
• Over-voltage protection stages in sensitive electronic systems
• Clamping applications in signal conditioning pathways

Procurement Notes

Verify the complete ordering code AZ23B20-E3-18 against official Vishay documentation to confirm commercial grade status and RoHS compliance. Ensure procurement channels source directly from authorized distributors to guarantee component authenticity and traceability throughout the supply chain.

Selection Notes

Select this component when a dual-channel solution with strict ±2% voltage accuracy is required. The E3 suffix indicates RoHS compliance without automotive qualification. For designs needing AEC-Q101 certification, consider the HE3_A variant instead. Verify that the 50 Ω dynamic resistance meets the specific circuit impedance requirements.

Part Context

This part belongs to the AZ23 series of small signal silicon planar Zener diodes. The series offers a broad Zener voltage range from 2.2 V to 75 V. The 'B' designation specifically denotes the tighter ±2% tolerance band compared to the standard ±5% 'C' grade devices within the same family.

Replacement Considerations

AZ23B20-E3-08 provides identical electrical specifications but utilizes 8 mm tape packaging on a 7-inch reel instead of the 13-inch reel format.