AZ23B3V9-HE3-18

Overview

The AZ23B3V9-HE3-18 is a dual common anode Zener diode array manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 3.9 V with a tight tolerance of ±2%. The device operates within a test current range of 1 to 5 mA and exhibits a maximum reverse leakage current of 3 µA at 3 V. Dynamic resistance is specified at 90 Ω, while the temperature coefficient ranges from -7 to -3 x 10⁻⁴/°C. Rated for power dissipation up to 500 mW (300 mW on FR-4), it functions between -55 °C and +150 °C in a compact SOT-23 package.

Feature Summary

• Dual common anode configuration providing two independent Zener references in a single surface-mount package
• High precision voltage grading with ±2% tolerance for applications requiring tight regulation accuracy
• Automotive-grade qualification compliant with AEC-Q101 standards for enhanced reliability
• Robust electrostatic discharge protection exceeding 8 kV via human body model

Applications

• Precision voltage reference circuits requiring dual outputs
• Over-voltage protection stages in automotive electronic control units
• Signal conditioning and clamping in industrial sensor interfaces
• Power supply monitoring and threshold detection systems

Procurement Notes

Verify that the ordering code suffix matches the required tape-and-reel quantity of 10,000 units per reel. Confirm the HE3_A designation indicates AEC-Q101 automotive qualification rather than standard commercial grade. Ensure the B tolerance code is present to guarantee the ±2% voltage specification. Cross-reference the specific datasheet revision to confirm compliance with current environmental directives.

Selection Notes

Select this component when a dual-channel Zener array with high voltage accuracy is required. The ±2% tolerance distinguishes it from the standard ±5% C-series variants. Verify that the 3.9 V breakdown voltage aligns with the target circuit thresholds. Consider the low dynamic resistance for stable performance under varying load conditions compared to higher impedance alternatives.

Part Context

This part belongs to the AZ23 series of small signal silicon planar Zener diodes. The series offers a wide voltage range from 2.2 V to 75 V across multiple tolerance grades. The AZ23B3V9 variant specifically targets applications needing precise dual references. The HE3_A suffix denotes RoHS compliance combined with automotive qualification, differentiating it from the standard E3 commercial versions.

Replacement Considerations

AZ23B3V9-E3-18: Commercial grade equivalent without AEC-Q101 qualification. AZ23B3V9-HE3_A-08: Automotive qualified version with 3,000-unit reel packaging. AZ23C3V9-HE3_A-18: Automotive qualified version with wider ±5% voltage tolerance.