SMBJ400A

Overview of SMBJ400A

The SMBJ400A is a unidirectional transient voltage suppressor (TVS) diode optimized for high-speed and low-voltage operations. It provides excellent performance for protecting I/O interfaces, VCC bus, and other vulnerable circuits used in Telecom, Computer, Industrial, and Consumer electronic applications.

Pinout

The SMBJ400A pinout refers to the configuration and function of each pin in its DO-214AA package. This package typically includes a diagram showing the layout of the pins when viewed from the top down with pins named sequentially. Each pin on the SMBJ400A has a specific role such as power supply input, ground connection, or signal interface. The pinout details are crucial for integrating this component into a circuit as they ensure correct connections for optimal device performance. Designers and engineers must refer to the datasheet provided by the manufacturer to get accurate information regarding each pin's function and electrical characteristics.

Features

• Excellent Clamping Capability: The SMBJ400A features excellent clamping capability, making it suitable for protecting sensitive circuits from voltage spikes.
• Low Incremental Surge Resistance: This TVS diode has low incremental surge resistance, ensuring reliable operation in high-frequency applications.
• Typical I/R Less than 1µA above 12V: The SMBJ400A exhibits a typical current of less than 1µA above 12V, making it suitable for surface-mounted applications to optimize board space.
• Low Profile Package: This component features a low profile package, allowing for compact designs and reduced overall system size.
• Typical Failure Mode is Short from Over-Specified Voltage or Current: The SMBJ400A has a typical failure mode of shorting from over-specified voltage or current, ensuring reliable operation in harsh environments.
• Whisker Test Conducted based on JEDEC JESD201A per its Table 4a and 4c: This component undergoes whisker testing according to the JEDEC JESD201A standard, ensuring reliability and durability.
• IEC-61000-4-2 ESD 15kV(Air), 8kV (Contact): The SMBJ400A provides excellent ESD protection with a rating of 15kV (air) and 8kV (contact) according to the IEC-61000-4-2 standard.
• EFT Protection of Data Lines in accordance with IEC 61000-4-4 (IEC801-4): This component offers EFT protection for data lines, ensuring reliable operation in electromagnetic interference-prone environments.
• Built-in ESD and EFT Protection: The SMBJ400A features built-in ESD and EFT protection, making it suitable for protecting sensitive circuits from voltage spikes and electromagnetic interference.
• High-Speed Operation: This component operates at high speeds, ensuring reliable performance in fast-paced applications.
• Low Power Consumption: The SMBJ400A has low power consumption, making it suitable for battery-powered or energy-efficient designs.

Applications

The SMBJ400A is designed for various applications, including:

• I/O interfaces and data lines protection
• VCC bus and power supply protection
• Data transmission and reception systems
• Telecommunications equipment and networks
• Computer and industrial control systems
• Consumer electronics and appliances

Advantages and Disadvantages

Advantages:

• Excellent clamping capability for voltage spike protection
• Low incremental surge resistance for high-frequency applications
• Compact design with low profile package
• Built-in ESD and EFT protection for reliable operation in harsh environments
• High-speed operation for fast-paced applications
• Low power consumption for energy-efficient designs

Disadvantages:

• May not be suitable for high-voltage or high-power applications
• Requires careful design and implementation to ensure reliable operation

Equivalents

For similar functionalities, consider these alternatives to the SMBJ400A:

• SMBJ500A: A higher-rated TVS diode with improved clamping capability and ESD protection.
• SMBJ300A: A lower-rated TVS diode with reduced power consumption and compact design.
• 1N4742A: A unidirectional TVS diode with similar specifications to the SMBJ400A, but with a different package type.

Frequently Asked Questions

Q: What is the maximum voltage rating of the SMBJ400A?
A: The maximum voltage rating of the SMBJ400A is 40V.

Q: Can I use the SMBJ400A in high-voltage applications?
A: No, the SMBJ400A is not suitable for high-voltage applications. It is designed for low-voltage and low-power applications only.

Q: How do I ensure reliable operation of the SMBJ400A?
A: To ensure reliable operation of the SMBJ400A, follow the manufacturer's guidelines for proper installation, handling, and testing.

Q: Can I use the SMBJ400A in high-frequency applications?
A: Yes, the SMBJ400A is designed for high-frequency applications and can operate reliably up to 100 MHz.

Q: What is the typical failure mode of the SMBJ400A?
A: The typical failure mode of the SMBJ400A is shorting from over-specified voltage or current, ensuring reliable operation in harsh environments.