AZ23B20-HE3-18

Overview

The AZ23B20-HE3-18 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 junction temperature range of -55 °C to +150 °C and provides a maximum power dissipation of 300 mW on an FR-4 board. Electrical characteristics include a reverse leakage current of 50 μA maximum at 15 V, a dynamic resistance of 220 Ω maximum at 5 mA, and a temperature coefficient ranging from 8 to 10 x 10⁻⁴/°C. It is housed in a compact SOT-23 surface-mount package.

Feature Summary

• Dual common anode configuration for space-efficient circuit designs
• Tight ±2% Zener voltage tolerance for precision applications
• AEC-Q101 qualified for automotive reliability standards
• High ESD protection capability exceeding 8 kV (HBM) and 800 V (MM)

Applications

• Automotive electronic circuits requiring AEC-Q101 compliance
• Precision voltage reference and regulation tasks
• ESD protection in sensitive signal lines

Procurement Notes

Verify the complete ordering code AZ23B20-HE3-18 to ensure correct tolerance and packaging. Confirm that the HE3 suffix indicates AEC-Q101 qualification and RoHS compliance. Check the specific datasheet revision for any updates to electrical parameters or mechanical dimensions before finalizing procurement specifications.

Selection Notes

Select this component when a dual Zener array with high voltage accuracy is required. The ±2% tolerance distinguishes it from standard ±5% variants. Ensure the application environment supports the specified operating temperature range and thermal dissipation limits on the target PCB footprint.

Part Context

This part belongs to the AZ23 series of small signal Zener diodes. The 'B' designation specifies the tighter ±2% voltage tolerance compared to the 'C' grade. The 'HE3' suffix denotes AEC-Q101 qualification and Green Molding Compound compliance, while '-18' indicates tape-and-reel packaging with 10,000 units per reel.

Replacement Considerations

AZ23B20-E3-18 offers identical electrical performance but lacks AEC-Q101 automotive qualification. AZ23C20-HE3-18 maintains automotive qualification but has a wider ±5% voltage tolerance.