The SMBJ400A-H is a surface-mount Transient Voltage Suppressor (TVS) diode manufactured by Bourns, Inc. It is designed to protect sensitive electronic components from voltage transients induced by lightning, inductive load switching, and electrostatic discharge (ESD). The 'A' suffix indicates a unidirectional configuration.

Applications

• Power Supplies: Providing surge protection for AC/DC and DC/DC power supplies.
• Telecommunications Equipment: Protecting telecom lines and equipment from lightning surges.
• Industrial Control Systems: Safeguarding I/O interfaces and control circuitry in industrial environments.
• Automotive Electronics: Protecting automotive control units (ECUs) and sensors from voltage transients.
• Consumer Electronics: Protecting power inputs and data lines in TVs, set-top boxes, and other consumer devices.

Features

• Unidirectional TVS Diode: Clamps voltage in one direction for optimized protection of DC circuits.
• Surface Mount SMB Package: Compact SMB (DO-214AA) package for easy PCB assembly.
• High Surge Capability: Withstands high surge currents without degradation.
• Fast Response Time: Quickly responds to transient voltage events.
• RoHS Compliant: Environmentally friendly, compliant with RoHS standards.

Benefits

• Enhanced System Reliability: Protects sensitive electronic components from damage due to voltage surges.
• Reduced Downtime: Minimizes equipment downtime and maintenance costs related to surge failures.
• Improved Product Lifespan: Extends the lifespan of electronic devices by protecting them from electrical overstress.
• Cost-Effective Protection: Provides a cost-effective solution for protecting valuable electronic assets.
• Simplified Design: Easy to integrate into new and existing designs due to its small size and surface-mount package.

Additional Details

The SMBJ400A-H has a standoff voltage of 400V. Its high surge capability and fast response time ensure effective protection against transient voltage events. The SMB package simplifies assembly and allows for efficient PCB layout. The device complies with RoHS standards, ensuring environmental friendliness. This part is often used where higher voltage protection is needed compared to lower voltage TVS diodes.