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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 56V SOT-23-3
- Series：AZ23
- Mfr：Vishay
- Package：Tape & Reel (TR)
- Configuration：1 Pair Common Anode
- Voltage - Zener (Nom) (Vz)：56 V
- Tolerance：±5%
- Power - Max：300 mW
- Impedance (Max) (Zzt)：135 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 42 V
- Operating Temperature：150°C (TJ)
- Grade：Automotive
- Qualification：AEC-Q101
- Mounting Type：Surface Mount
- pa_package-case：
- Supplier Device Package：SOT-23-3
- Voltage - Forward (Vf) (Max) @ If：-
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Overview
The Vishay AZ23C56-HE3_A-08 is a silicon planar Zener diode in the AZ23 series, housed in an SOT-23 surface-mount package. It features a nominal Zener voltage of 56 V with a ±5% tolerance and operates at a test current of 2 mA. The device has a maximum reverse leakage current of 42 µA at 50 V and a dynamic resistance of 135 Ω at 1 kHz. Rated for AEC-Q101 automotive qualification, it dissipates up to 500 mW (300 mW on FR-4) and withstands junction temperatures up to 150 °C.
Feature Summary
- Dual-element common anode configuration for compact circuit integration
- ESD protection exceeding 8 kV via human body model and 800 V via machine model
- Automotive-grade reliability through AEC-Q101 qualification
Applications
- Voltage reference circuits requiring stable potential levels
- Overvoltage protection stages in automotive electronics
- Clamping applications within signal conditioning networks
Procurement Notes
Verify component authenticity by cross-referencing the ordering code against official Vishay documentation. Confirm that the HE3_A suffix indicates AEC-Q101 compliance and RoHS adherence. Ensure storage conditions remain within specified limits to maintain solderability and prevent moisture absorption prior to assembly.
Selection Notes
Select this variant when a 56 V breakdown voltage with standard tolerance is required in an SOT-23 footprint. Consider the 2 mA test current for low-power biasing scenarios. Evaluate thermal constraints carefully, as power dissipation drops significantly above ambient temperatures exceeding 75 °C.
Part Context
This component belongs to the AZ23 series of small-signal Zener diodes manufactured by Vishay Semiconductors. The series offers various voltage grades from 2.2 V to 75 V in the SOT-23 package. The HE3_A designation specifically denotes the automotive-qualified, lead-free version compliant with international environmental standards.
Replacement Considerations
Direct substitutes include other AZ23C56 variants such as AZ23C56-E3-08 or AZ23C56-G3-08, provided automotive qualification is not mandatory. Verify pinout compatibility and thermal characteristics before substituting components from different manufacturers.
FAQ
What is the marking code for the AZ23C56-HE3_A-08?
The marking code for this specific part number is D73.
How does the dynamic resistance vary with frequency?
The datasheet specifies the dynamic resistance (ZZ) at a test frequency of 1 kHz.
Is this component suitable for high-voltage transient suppression?
While it provides clamping functionality, its primary design is for voltage regulation and reference applications rather than high-energy transient suppression.
