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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 4.7V SOT-23-3
- Series：AZ23
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Tape & Reel (TR)
- Configuration：1 Pair Common Anode
- Voltage - Zener (Nom) (Vz)：4.7 V
- Tolerance：±2%
- Power - Max：300 mW
- Impedance (Max) (Zzt)：80 Ohms
- Current - Reverse Leakage @ Vr：3 µA @ 2 V
- Operating Temperature：150°C (TJ)
- Grade：Automotive
- Qualification：AEC-Q101
- Mounting Type：Surface Mount
- pa_package-case：
- Supplier Device Package：SOT-23-3
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Overview
The AZ23B4V7-HE3_A-18 is a dual common anode silicon planar Zener diode array from the Vishay AZ23 series, housed in a SOT-23 surface-mount package. It features a nominal Zener voltage of 4.7 V with a tight ±2% tolerance and a maximum power dissipation of 500 mW (300 mW on FR-4). The device is AEC-Q101 qualified for automotive reliability and offers high ESD protection exceeding 8 kV via the human body model. Electrical characteristics include a test current of 5 mA, a reverse leakage current of 1 µA maximum, and a dynamic resistance of 78 Ω at 1 kHz.
Feature Summary
- Dual common anode configuration for space-efficient circuit designs
- AEC-Q101 qualification ensuring robustness in automotive environments
- High electrostatic discharge immunity exceeding 8 kV HBM standards
- Tight voltage tolerance of ±2% for precise regulation applications
Applications
- Automotive electronic systems requiring AEC-Q101 compliance
- Precision voltage reference circuits utilizing dual common anode topology
- ESD protection stages in sensitive signal conditioning paths
Procurement Notes
Verify component authenticity by cross-referencing the ordering code against official Vishay documentation. Confirm that the HE3_A suffix correctly denotes AEC-Q101 qualification and RoHS compliance. Ensure the specific tape and reel packaging matches the required quantity specifications for production integration.
Selection Notes
Select this variant when a dual common anode Zener array with strict ±2% voltage tolerance is required. The AEC-Q101 qualification makes it suitable for automotive applications where high reliability and ESD robustness are critical design constraints. Verify thermal management requirements against the 300 mW dissipation limit on standard PCB footprints.
Part Context
This component belongs to the Vishay AZ23 series of small signal Zener diodes. The series provides a wide range of standardized voltages following the E24 standard. The B designation indicates the tighter ±2% tolerance grade, while the HE3_A suffix specifies the automotive-grade, lead-free construction within the SOT-23 package family.
Replacement Considerations
AZ23B4V7-E3-18
FAQ
What is the dynamic resistance of the AZ23B4V7-HE3_A-18?
The dynamic resistance (ZZ) is specified as a maximum of 78 Ω when tested at a current of 1 mA.
How does the HE3_A suffix affect the component's qualification?
The HE3_A suffix indicates that the device is RoHS-compliant and qualified according to the AEC-Q101 automotive standard.
What is the maximum reverse leakage current for this part?
The maximum reverse leakage current is 1 µA when measured at a reverse voltage of 3 V.
