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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 18V SOT-23-3
- Series：AZ23
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Tape & Reel (TR)
- Configuration：1 Pair Common Anode
- Voltage - Zener (Nom) (Vz)：18 V
- Tolerance：±2%
- Power - Max：300 mW
- Impedance (Max) (Zzt)：45 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 12.6 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 AZ23B18-HE3_A-18 is a silicon planar Zener diode array featuring two common-anode channels in an SOT-23 package. It provides a nominal Zener voltage of 18 V with a tight tolerance of ±2%. The device is AEC-Q101 qualified for automotive applications and supports power dissipation up to 500 mW on leads or 300 mW on FR-4 boards. Operating junction temperature ranges from -55 °C to +150 °C, ensuring reliability across wide thermal environments.
Feature Summary
- Dual-channel common-anode configuration within a compact SOT-23 surface-mount package
- AEC-Q101 qualification supporting automotive-grade environmental and reliability standards
- High electrostatic discharge robustness exceeding 8 kV human body model and 800 V machine model
- RoHS-compliant manufacturing utilizing the HE3 (High Efficiency) lead-free termination system
Applications
- Automotive circuit protection and voltage reference stabilization
- ESD suppression networks requiring dual-channel clamping
- Precision voltage regulation in space-constrained electronic assemblies
Procurement Notes
Verify component authenticity by cross-referencing the manufacturer part number against official Vishay documentation. Confirm that the specific ordering suffix matches the required tape-and-reel packaging format and AEC-Q101 qualification status before finalizing procurement orders.
Selection Notes
Select this variant when a precise ±2% voltage tolerance is mandatory for dual-channel applications. Ensure the design accommodates the specified dynamic resistance and leakage current limits at the target operating temperature range.
Part Context
This component belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay General Semiconductor. The series offers various voltage grades and tolerance options, with the HE3_A suffix specifically denoting automotive qualification and RoHS compliance.
Replacement Considerations
AZ23B18-HE3-18
FAQ
What is the maximum reverse leakage current specified for this device?
The maximum reverse leakage current is 0.05 µA when tested at a reverse voltage of 14 V.
How does the dynamic resistance vary under different test conditions?
The dynamic resistance is specified as 45 Ω at a test current of 5 mA and increases to 170 Ω at a lower test current of 1 mA.
What marking code identifies this specific part on the package?
The device is marked with the code DF1 to identify its type and specifications.
