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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 4.7V SOT-23-3
- Series：AZ23
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Tape & Reel (TR)
- Configuration：1 Pair Common Anode
- Voltage - Zener (Nom) (Vz)：4.7 V
- Tolerance：±2%
- Power - Max：300 mW
- Impedance (Max) (Zzt)：78 Ohms
- Current - Reverse Leakage @ Vr：-
- Operating Temperature：-55°C ~ 150°C
- Grade：Automotive
- Qualification：AEC-Q101
- Mounting Type：Surface Mount
- pa_package-case：
- Supplier Device Package：SOT-23-3
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Overview
The AZ23B4V7-HE3-18 is a dual common anode silicon planar Zener diode array from the Vishay AZ23 series, housed in a SOT-23 surface-mount package. It provides a nominal Zener voltage of 4.7 V with a tight tolerance of ±2%. The device operates at a test current of 5 mA and features a maximum dynamic resistance of 78 Ω. Rated for a power dissipation of 300 mW on an FR-4 board, it supports an operating temperature range from -55 °C to +150 °C. This specific variant is AEC-Q101 qualified for automotive reliability and supplied in tape-and-reel packaging.
Feature Summary
- Dual common anode configuration integrates two Zener diodes into a single compact footprint.
- AEC-Q101 qualification ensures compliance with rigorous automotive electronic component standards.
- Tight ±2% voltage tolerance provides precise regulation for sensitive circuit applications.
Applications
- Automotive electronics requiring robust voltage reference stability under varying thermal conditions
- Protection circuits utilizing dual independent clamping paths within a shared ground topology
- Precision analog signal conditioning where low leakage and high impedance are required
Procurement Notes
Verify that the ordering code suffix matches the required reel size and qualification level. Confirm RoHS compliance status and material categorization details against the latest Vishay documentation before finalizing purchase orders. Ensure storage and handling procedures adhere to moisture sensitivity level requirements.
Selection Notes
Select this part when a dual Zener array with strict ±2% tolerance is necessary for automotive or industrial environments. Compare the 78 Ω dynamic resistance against circuit requirements to ensure adequate regulation performance. Verify that the 300 mW power dissipation rating aligns with the expected thermal load on the PCB layout.
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 graded according to the E24 standard. The 'B' designation indicates the tighter ±2% tolerance band compared to the standard ±5% 'C' variants.
Replacement Considerations
AZ23B4V7-HE3_A-18
FAQ
What is the reverse leakage current specification for the AZ23B4V7-HE3-18?
The maximum reverse leakage current is specified as 3 μA at a reverse voltage of 1 V.
How does the HE3 suffix affect the device qualification?
The HE3 suffix indicates that the device is RoHS-compliant and AEC-Q101 qualified, making it suitable for automotive applications.
What is the thermal resistance junction-to-lead value?
The thermal resistance from junction to lead (RthJL) is 250 K/W.
