The SMBJ5347B is a surface-mount Transient Voltage Suppressor (TVS) diode from Micro Commercial Components (MCC). It is designed to protect sensitive electronic components from voltage transients induced by lightning, inductive load switching, and Electrostatic Discharge (ESD). This TVS diode is characterized by its high surge current capability, fast response time, and low clamping voltage.

Applications

• I/O Port Protection: Protects sensitive I/O ports from ESD and voltage transients.
• Data Line Protection: Safeguards data lines in communication systems.
• Microcontroller Protection: Protects microcontrollers and other integrated circuits from overvoltage events.
• Power Supply Protection: Provides protection against voltage surges and transients in power supplies.
• Automotive Electronics: Used in automotive applications for transient voltage protection.

Features

• Unidirectional TVS Diode: Provides protection against positive voltage transients.
• Surface Mount Package: Allows for automated assembly and space-saving designs.
• High Surge Current Capability: Withstands high surge currents without degradation.
• Fast Response Time: Quickly clamps transient voltages to safe levels.
• Low Clamping Voltage: Minimizes the voltage stress on protected components.

Benefits

• Enhanced Circuit Protection: Protects sensitive electronic components from damage due to voltage transients.
• Improved System Reliability: Reduces the risk of system failures caused by overvoltage events.
• Compact Design: Small surface mount package allows for high-density circuit designs.
• Simplified Assembly: Surface mount design simplifies the assembly process and reduces manufacturing costs.
• Increased Uptime: Minimizes downtime due to component failures caused by voltage transients.

Additional Details

The SMBJ5347B has a standoff voltage (VR) of 13V and a breakdown voltage (VBR) between 14.5V and 16.1V. Its maximum clamping voltage (VC) is 21.5V at a peak pulse current (IPP) of 8.4A (defined by a 10/1000μs pulse waveform). The device has a peak pulse power dissipation (PPPM) rating suitable for its surge handling capability. It is packaged in an SMB (DO-214AA) surface mount package. It is crucial to consult the official Micro Commercial Components datasheet for detailed electrical characteristics, surge waveform specifications, and derating curves to ensure proper selection and application of the TVS diode. Proper PCB layout and placement of the TVS diode close to the protected components are essential for optimal performance.