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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 51V SOT-23-3
- Series：AZ23
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Tape & Reel (TR)
- Configuration：1 Pair Common Anode
- Voltage - Zener (Nom) (Vz)：51 V
- Tolerance：±2%
- Power - Max：300 mW
- Impedance (Max) (Zzt)：180 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 35.7 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 AZ23B51-HE3_A-18 is a silicon planar Zener diode array from the Vishay AZ23 series, housed in an SOT-23 package. It features a common anode configuration with two independent Zener diodes sharing a single terminal. The nominal Zener voltage is 51 V with a tight tolerance of ±2%. Rated for a maximum power dissipation of 300 mW on an FR-4 board, it operates within a temperature range of -55 °C to +150 °C. This component is AEC-Q101 qualified and RoHS compliant.
Feature Summary
- AEC-Q101 qualified for automotive reliability standards
- Common anode dual-diode configuration in compact SOT-23 package
- High ESD protection capability exceeding 8 kV (HBM) and 800 V (MM)
- RoHS compliant construction with lead-free soldering compatibility
Applications
- Automotive circuit voltage regulation and clamping
- Dual-channel overvoltage protection in electronic control units
- Precision reference applications requiring tight voltage tolerance
Procurement Notes
Verify the specific ordering code suffix against current Vishay documentation to confirm tape-and-reel specifications and packaging dimensions. Ensure that the AEC-Q101 qualification status aligns with your project's automotive reliability requirements before finalizing procurement orders.
Selection Notes
Select this part when a dual Zener array with high precision is required in a small surface-mount footprint. The ±2% tolerance makes it suitable for applications demanding strict voltage accuracy. Confirm that the 51 V breakdown voltage matches the system's protection thresholds and that the 300 mW power rating accommodates the expected thermal load.
Part Context
This device belongs to the Vishay AZ23 series of small signal Zener diodes. The series offers a wide range of standardized voltages based on the E24 standard. The 'B' designation indicates the tighter ±2% tolerance variant, while the 'HE3_A' suffix denotes the AEC-Q101 qualified, RoHS-compliant version packaged in a 13-inch reel format.
Replacement Considerations
AZ23B51-E3-18
FAQ
What is the dynamic resistance of the AZ23B51-HE3_A-18?
The maximum dynamic resistance (ZZ) at the test current IZT1 is 100 Ω.
Is the AZ23B51-HE3_A-18 suitable for automotive applications?
Yes, the HE3_A suffix indicates that the device is AEC-Q101 qualified for automotive use.
What is the reverse leakage current specification?
The maximum reverse leakage current is 0.05 μA at a reverse voltage of 38 V.
