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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 4.3V SOT-23-3
- Series：AZ23
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Tape & Reel (TR)
- Configuration：1 Pair Common Anode
- Voltage - Zener (Nom) (Vz)：4.3 V
- Tolerance：±2%
- Power - Max：300 mW
- Impedance (Max) (Zzt)：95 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 AZ23B4V3-HE3-18 is a silicon planar Zener diode from the Vishay AZ23 series, housed in an SOT-23 surface-mount package. It features a nominal Zener voltage of 4.3 V with a tight tolerance of ±2%, indicated by the 'B' designation. The device operates at a test current of 5 mA and provides a maximum reverse leakage current of 3 µA at 3 V. Electrical characteristics include a dynamic resistance (ZZ) of 90 Ω and a temperature coefficient ranging from -6 to -1 x 10⁻⁴/°C. It supports a power dissipation of up to 500 mW and functions within a junction temperature range of -55 °C to +150 °C.
Feature Summary
- Dual common anode configuration for space-efficient circuit integration
- High ESD protection capability exceeding 8 kV via human body model
- RoHS-compliant commercial grade construction without automotive qualification
Applications
- Voltage reference circuits requiring precise low-voltage regulation
- Transient voltage suppression in signal conditioning paths
- Clamping applications in portable electronic devices
Procurement Notes
Verify component authenticity through authorized distribution channels. Confirm that the HE3 suffix denotes lead-free soldering compatible with standard reflow profiles. Ensure the ordering code matches the specific ±2% tolerance requirement, as the 'B' variant differs electrically from the standard 'C' version. Validate RoHS compliance documentation against current regulatory standards before finalizing procurement orders.
Selection Notes
Select this component when a dual-diode array with strict voltage accuracy is required in a compact footprint. The ±2% tolerance offers superior precision compared to standard ±5% variants. Consider the thermal resistance parameters for high-density PCB layouts where heat dissipation may impact performance. Verify that the 5 mA test current aligns with the target application's biasing constraints.
Part Context
This part belongs to the AZ23 series of small-signal Zener diodes manufactured by Vishay General Semiconductor. The series utilizes silicon planar technology optimized for surface-mount assembly. The specific suffix '-HE3-18' indicates a lead-free finish and a tape-and-reel packaging format containing 10,000 units per reel, designed for automated pick-and-place manufacturing processes.
Replacement Considerations
AZ23B4V3-E3-18
FAQ
What is the difference between the AZ23B4V3 and AZ23C4V3 variants?
The 'B' suffix indicates a tighter Zener voltage tolerance of ±2%, whereas the 'C' suffix denotes a standard tolerance of ±5%. Both share identical electrical ratings and physical dimensions.
Is the AZ23B4V3-HE3-18 qualified for automotive applications?
No. The HE3 suffix indicates a RoHS-compliant commercial grade product. Automotive-grade versions require the HE3_A suffix and AEC-Q101 qualification.
What is the maximum power dissipation rating?
The absolute maximum power dissipation is 500 mW. However, on an FR-4 board with the recommended soldering footprint, the practical limit is 300 mW.
