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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：±2%
- 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 AZ23B56-HE3_A-18 is a dual common anode silicon planar Zener diode array housed in an SOT-23 package. It features a nominal Zener voltage of 56 V with a tight tolerance of ±2%. The device is AEC-Q101 qualified for automotive applications and operates within a temperature range of -55 °C to +150 °C. Electrical characteristics include a maximum reverse leakage current of 5 μA at 46.5 V, a dynamic resistance (ZZ) of 135 Ω at the test current of 2 mA, and a temperature coefficient ranging from 9 to 11 x 10⁻⁴/°C.
Feature Summary
- Dual common anode configuration providing two independent Zener references in a single compact surface-mount package.
- AEC-Q101 qualification ensures suitability for demanding automotive electronic environments.
- High electrostatic discharge (ESD) protection capability exceeding 8 kV via human body model standards.
Applications
- Automotive circuit voltage regulation and reference generation
- Overvoltage protection for sensitive signal lines
- Clamping circuits in industrial control systems
Procurement Notes
Verify that the ordering code matches the specific suffix requirements for automotive grade compliance and reel packaging quantity. Confirm RoHS3 material categorization status through official Vishay documentation prior to final procurement decisions to ensure regulatory alignment.
Selection Notes
Select this component when a precise ±2% voltage tolerance is required for dual-channel voltage referencing. Ensure the operating environment remains within the specified -55 °C to +150 °C range and account for the 135 Ω dynamic resistance in high-frequency or precision signal paths.
Part Context
This part belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series utilizes silicon planar technology and offers various voltage grades compliant with international E24 standards across multiple tolerance options and packaging configurations.
Replacement Considerations
Direct replacements must match the SOT-23 footprint, dual common anode topology, and 56 V nominal voltage. Verify that any substitute also holds AEC-Q101 qualification if used in automotive contexts.
FAQ
What is the dynamic resistance of the AZ23B56-HE3_A-18?
The dynamic resistance (ZZ) is 135 Ω, measured at a test current of 2 mA.
Is this component suitable for automotive applications?
Yes, the HE3_A suffix indicates that the device is AEC-Q101 qualified for automotive use.
What is the maximum reverse leakage current?
The maximum reverse leakage current is 5 μA, specified at a reverse voltage of 46.5 V.
