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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)：78 Ohms
- Current - Reverse Leakage @ Vr：-
- Operating Temperature：-55°C ~ 150°C
- 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-HE3-08 is a dual common anode silicon planar Zener diode array from the Vishay AZ23 series, housed in an SOT-23 package. It features a nominal Zener voltage of 4.7 V with a tight ±2% tolerance and a maximum power dissipation of 500 mW. The device is AEC-Q101 qualified for automotive reliability and offers high ESD protection exceeding 8 kV (HBM) and 800 V (MM). Electrical characteristics include a reverse leakage current of 3 μA at 4.7 V and a dynamic resistance of 78 Ω at a test current of 5 mA.
Feature Summary
- Dual common anode configuration within a compact SOT-23 surface-mount package
- AEC-Q101 qualification ensuring compliance with automotive electronic standards
- High electrostatic discharge robustness exceeding 8 kV human body model limits
- Tight voltage tolerance of ±2% for precise reference applications
Applications
- Automotive circuit voltage regulation and clamping
- Precision voltage reference generation in sensitive electronics
- Electrostatic discharge (ESD) protection for signal lines
Procurement Notes
Verify component authenticity through authorized distribution channels to ensure compliance with AEC-Q101 automotive standards. Confirm that the specific HE3_A suffix matches the required RoHS-compliant and lead-free specifications. Validate packaging details against project requirements before finalizing orders.
Selection Notes
Select this variant when a dual common anode topology is required alongside strict ±2% voltage accuracy. Ensure the operating environment remains within the -55 °C to +150 °C range. Verify that the 500 mW power dissipation rating accommodates the thermal conditions of the target application design.
Part Context
This component belongs to the Vishay AZ23 series of small signal Zener diodes. The series provides a wide range of standard E24 voltages in a standardized SOT-23 footprint. The 'B' designation indicates the tighter ±2% tolerance grade, while the 'HE3_A' suffix denotes the automotive-grade, RoHS-compliant version of the device.
Replacement Considerations
AZ23B4V7-HE3_A-08
FAQ
What is the difference between the AZ23C4V7 and AZ23B4V7 variants?
The primary difference is the voltage tolerance. The AZ23C4V7 has a standard ±5% tolerance, whereas the AZ23B4V7 offers a tighter ±2% tolerance.
How does the HE3_A suffix affect the component's electrical performance?
The HE3_A suffix indicates that the device is manufactured to be RoHS compliant and qualified to the AEC-Q101 automotive standard. It does not alter the fundamental electrical parameters compared to the commercial grade.
What is the maximum junction temperature for this device?
The maximum junction temperature (Tj) for the AZ23 series is specified as 150 °C.
