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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 39V SOT-23-3
- Series：AZ23-G
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Tape & Reel (TR)
- Configuration：1 Pair Common Anode
- Voltage - Zener (Nom) (Vz)：39 V
- Tolerance：±2%
- Power - Max：300 mW
- Impedance (Max) (Zzt)：90 Ohms
- Current - Reverse Leakage @ Vr：100 nA @ 29 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 AZ23B39-G3-08 is a dual common anode silicon planar Zener diode array from the Vishay AZ23-G series, housed in a SOT-23 surface-mount package. It features a nominal Zener voltage of 39 V with a tight ±2 % tolerance. The device operates at a test current of 0.5 mA and exhibits a maximum dynamic resistance of 87 Ω and a reverse leakage current of 50 μA at 29 V. Rated for power dissipation up to 500 mW on FR-4 boards, it supports an operating temperature range from -55 °C to +150 °C.
Feature Summary
- Dual common anode configuration integrating two Zener elements within a single three-terminal SOT-23 footprint.
- High precision grading with ±2 % Zener voltage tolerance defined by the 'B' designation in the ordering code.
- Robust thermal management capabilities allowing operation up to 150 °C junction temperature.
Applications
- Precision voltage reference circuits requiring dual independent regulation channels.
- Over-voltage protection stages utilizing the common anode topology.
- Signal conditioning networks where compact surface-mount packaging is required.
Procurement Notes
Verify the specific suffix '-G3-08' to confirm commercial grade status and standard reel quantity. Ensure compatibility with standard SOT-23 footprints during PCB layout. Confirm that the ±2 % tolerance meets the design requirements compared to the standard ±5 % variant.
Selection Notes
Select this part when precise dual-channel voltage regulation is needed in a minimal footprint. The 39 V rating suits applications requiring higher threshold protection or reference levels. Consider the 0.5 mA test current for low-power designs rather than the 5 mA standard used for lower voltage variants.
Part Context
This component belongs to the AZ23-G series of small signal Zener diodes manufactured by Vishay Semiconductors. The series covers a wide voltage range from 2.2 V to 75 V. The 'B' suffix indicates the tighter tolerance band, while the 'G3' denotes lead-free compliance and green material categorization.
Replacement Considerations
AZ23C39-G3-08 offers identical electrical characteristics but with a wider ±5 % voltage tolerance. Other manufacturers may provide equivalent dual Zener arrays in SOT-23 packages, though pinout and exact impedance values should be verified against the datasheet.
FAQ
What is the difference between AZ23B39 and AZ23C39?
The primary difference is the Zener voltage tolerance. AZ23B39 has a ±2 % tolerance, whereas AZ23C39 has a standard ±5 % tolerance. All other electrical parameters remain consistent.
How does the common anode configuration work?
Both internal Zener diodes share a single common anode terminal (Pin 3). This allows for independent cathode connections (Pins 1 and 2) to regulate two separate voltage rails or signals relative to the common ground/anode.
What is the maximum power dissipation?
The maximum power dissipation is 500 mW when mounted on an FR-4 board with the recommended soldering footprint. The thermal resistance from junction to lead is specified at 250 K/W.
