AZ23B51-HE3-08

Overview

The AZ23B51-HE3-08 is a dual common anode silicon planar Zener diode array from the Vishay AZ23 series, housed in a SOT-23 package. It features a nominal Zener voltage of 51 V with a tight tolerance of ±2%. The device operates at a test current of 2 mA and exhibits a maximum reverse leakage current of 50 µA at 38 V. Dynamic resistance is specified at 100 Ω (ZZ) and 400 Ω (ZZK). Qualified under AEC-Q101 standards, it supports junction temperatures up to 150 °C and offers high ESD protection exceeding 8 kV via the human body model.

Feature Summary

• Dual common anode configuration for space-efficient circuit design
• AEC-Q101 automotive qualification ensuring reliability in harsh environments
• High electrostatic discharge robustness exceeding 8 kV HBM
• Tight voltage tolerance of ±2% for precision regulation

Applications

• Automotive electronic systems requiring qualified components
• Precision voltage reference circuits
• Over-voltage protection stages

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm tape-and-reel packaging and quantity specifications. Ensure the HE3 designation aligns with required automotive qualification standards. Cross-reference the manufacturer's latest datasheet revision to validate all electrical parameters before finalizing procurement orders.

Selection Notes

Select this component when a dual common anode topology is required within a compact SOT-23 footprint. The ±2% tolerance makes it suitable for applications demanding tighter voltage regulation than standard commercial grades. Verify that the 51 V breakdown voltage matches the target circuit requirements and that the 300 mW power dissipation rating accommodates the thermal environment.

Part Context

This part belongs to the Vishay AZ23 series of small signal Zener diodes. The series provides various voltage options graded according to the international E24 standard. The 'B' suffix indicates the ±2% tolerance variant, while 'HE3' denotes RoHS compliance and AEC-Q101 qualification. These devices are designed for surface-mount assembly using standard SMT processes.

Replacement Considerations

Direct functional equivalents within the same series include AZ23B51-E3-08 or AZ23B51-G3-08. Substitutes must maintain the dual common anode configuration, 51 V nominal voltage, and ±2% tolerance. Verify that any replacement meets the same AEC-Q101 automotive qualification if required by the application.