SMBJ40A

The SMBJ40A is a transient voltage suppressor diode (TVS diode) designed to provide protection against voltage transients and surges in electronic circuits. It is specifically designed to clamp transient voltage spikes and divert excess current away from sensitive components, thereby preventing damage due to overvoltage events.

Key Features:

• Bidirectional Protection: The SMBJ40A offers bidirectional transient voltage suppression, meaning it can protect against both positive and negative voltage transients.

• Low Clamping Voltage: The diode features a low clamping voltage, ensuring that it conducts quickly when the voltage across it exceeds the breakdown voltage, thereby limiting the voltage applied to the protected circuit.

• Fast Response Time: It provides a fast response time to transient voltage spikes, clamping the voltage to a safe level within nanoseconds to protect sensitive components.

• High Surge Current Capability: The SMBJ40A is capable of handling high surge currents resulting from transient voltage events, ensuring robust protection for electronic circuits.

• Low Leakage Current: The diode exhibits low leakage current under normal operating conditions, minimizing power consumption and ensuring efficiency in the protected circuit.

• Surface-Mount Package: The SMBJ40A is housed in a surface-mount SMB (DO-214AA) package, which is suitable for automated assembly processes and compact PCB layouts.

• Wide Operating Temperature Range: It is designed to operate reliably over a wide temperature range, making it suitable for use in various environmental conditions and applications.

• RoHS Compliance: The SMBJ40A complies with the Restriction of Hazardous Substances (RoHS) directive, ensuring that it meets environmental standards for the elimination of hazardous materials in electronic components.

Applications:

• Power Supply Protection: Used in power supply circuits to protect sensitive electronic components from voltage transients and surges originating from the power source.

• Communication Systems: Integrated into communication systems, including Ethernet, telecom, and data transmission equipment, to safeguard against voltage surges induced by lightning strikes, ESD (electrostatic discharge), and electromagnetic interference.

• Industrial Equipment: Employed in industrial control systems, motor drives, and automation equipment to protect against voltage spikes generated by inductive loads and switching transients.

• Consumer Electronics: Used in consumer electronics products such as smartphones, tablets, computers, and home appliances to protect against voltage surges from the power grid or external sources.

• Automotive Electronics: Integrated into automotive electronics systems, including vehicle control units, infotainment systems, and electronic modules, to protect against voltage transients caused by load dumps, alternator noise, and ESD events.

• LED Lighting: Employed in LED lighting fixtures and drivers to protect against voltage spikes and surges, ensuring reliable operation and extended lifespan of LED components.