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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)：100 Ohms
- Current - Reverse Leakage @ Vr：100 nA @ 38 V
- Operating Temperature：-55°C ~ 150°C
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- pa_package-case：
- Supplier Device Package：SOT-23-3
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Overview
The AZ23B51-E3-08 is a dual common-anode silicon planar Zener diode array from the Vishay AZ23 series, housed in an SOT-23 surface-mount package. It provides two independent Zener diodes sharing a common anode terminal. The nominal Zener voltage is 51 V with a tight tolerance of ±2%, tested at a current of 2 mA. Key electrical characteristics include a maximum reverse leakage current of 50 nA and a dynamic resistance of 100 Ω at the test current. The device supports a maximum power dissipation of 300 mW on a standard FR-4 board and operates within a temperature range of -55 °C to +150 °C.
Feature Summary
- Dual common-anode configuration for space-efficient circuit design
- Tight ±2% voltage tolerance for precision regulation applications
- Automotive-grade reliability with AEC-Q101 qualification available
- High electrostatic discharge protection capability
Applications
- Precision voltage reference circuits requiring dual rails
- Over-voltage protection stages in signal conditioning paths
- Clamping networks for sensitive input interfaces
- Voltage threshold detection logic
Procurement Notes
Verify the specific ordering suffix against the manufacturer's official documentation to confirm tape-and-reel quantities and RoHS compliance status. Ensure that the procurement channel sources directly from authorized distributors to guarantee component authenticity and traceability throughout the supply chain.
Selection Notes
Select this variant when a precise 51 V breakdown voltage with strict ±2% tolerance is required in a compact footprint. Consider the common-anode topology for simplified biasing arrangements. Evaluate the thermal derating curves if operating near the upper temperature limits or under high ambient conditions.
Part Context
This component belongs to the AZ23 series of small-signal Zener diodes manufactured by Vishay Semiconductors. The series offers a wide range of standardized voltages based on the E24 series, packaged in the industry-standard SOT-23 form factor. The 'B' designation specifically indicates the tighter manufacturing tolerance compared to the standard 'C' grade.
Replacement Considerations
Direct functional equivalents within the same Vishay family include the AZ23C51-E3-08, which shares the same package and pinout but features a wider ±5% voltage tolerance. Other manufacturers may offer compatible SOT-23 dual Zener arrays, though exact parameter matching requires careful datasheet comparison.
FAQ
What is the marking code for the AZ23B51-E3-08?
The device marking code is DG2.
How does the test current differ between the B and C grades?
For the 51 V part number, both the AZ23B51 and AZ23C51 variants utilize a test current (IZT) of 2 mA.
Is this component qualified for automotive applications?
The base E3 version is commercial grade. Automotive qualification (AEC-Q101) is available for the HE3_A variant, not the standard E3 version.
