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Product Detailed Parameters
- Description：DIODE ZENER ARRAY 43V SOT-23-3
- Series：-
- Mfr：Diotec Semiconductor
- Package：Bulk
- Configuration：1 Pair Common Anode
- Voltage - Zener (Nom) (Vz)：43 V
- Tolerance：±5%
- Power - Max：300 mW
- Impedance (Max) (Zzt)：150 Ohms
- Current - Reverse Leakage @ Vr：50 nA @ 30.1 V
- Operating Temperature：-50°C ~ 150°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- pa_package-case：
- Supplier Device Package：SOT-23-3 (TO-236)
- Voltage - Forward (Vf) (Max) @ If：-
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Overview
The Diotec Semiconductor BZX84C43 is a single SMD planar Zener diode housed in an SOT-23 (TO-236) package. It provides a nominal Zener voltage of 43 V with a tolerance range of 40 V to 46 V at a test current of 5 mA. The device supports a maximum power dissipation of 300 mW and operates within a junction temperature range of -50°C to +150°C. Key electrical characteristics include a dynamic resistance of less than 150 Ohms, a reverse leakage current of 0.05 µA at 30.1 V, and a temperature coefficient of +7% to +10%. The component is available in commercial grade (-C suffix), industrial grade (no suffix), AEC-Q101 compliant (-Q suffix), and qualified (-AQ suffix).
Feature Summary
- Sharp Zener voltage breakdown for stable regulation.
- Low leakage current to minimize standby power loss.
- Compliant with RoHS directives without exemptions.
Applications
- Voltage stabilization circuits.
- Linear voltage regulators.
Procurement Notes
Verify the specific ordering suffix to confirm the required reliability grade. The standard commercial version lacks automotive qualification, while the -Q and -AQ variants meet AEC-Q101 standards. Confirm that the SOT-23 footprint matches the target PCB layout and ensure thermal management accommodates the 300 mW dissipation limit under expected operating conditions.
Selection Notes
Select the appropriate suffix based on environmental requirements: use -C for general commercial use, no suffix for industrial applications, or -Q/-AQ for automotive contexts. Ensure the circuit design maintains the Zener current within the specified limits to keep the voltage within the 40 V to 46 V tolerance band. Verify that the low reverse leakage current meets the sensitivity requirements of the protected circuitry.
Part Context
This component belongs to the BZX84Cxx series of SMD planar Zener diodes manufactured by Diotec Semiconductor. The series covers a wide voltage range from 2.4 V to 47 V in the compact SOT-23 package. The 2BZX84Cxx variant offers a common anode configuration for dual-diode applications, whereas this part is a single diode designed for standard voltage reference tasks.
Replacement Considerations
Direct substitutes within the same manufacturer family include BZX84C43-AQ and BZX84C43-C. Cross-manufacturer replacements must match the 43 V nominal voltage, SOT-23 package, and 300 mW power rating. Verify dynamic resistance and leakage current specifications to ensure equivalent performance in the target application.
FAQ
What is the temperature coefficient for the BZX84C43?
The temperature coefficient of the Zener voltage is between +7% and +10%.
How does the marking code identify this component?
The marking code for the BZX84C43 is 'A0' or 'Y15'.
What is the maximum Zener current allowed?
The maximum Zener current (IZmax) is 7 mA when mounted on a PCB with 3 mm² copper pads per terminal.
