SM6T18CA-M3/5B

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Transient Voltage Suppressors (TVS) are very useful components in an electrical design. They are used to protect both the equipment and the system power supply from transient voltage or electrical stress events. TVS is designed as a one-way nonlinear device, which provides electrical protection by either clamping or shunting transient voltages during an electrical surge event.

SM6T18CA-M3/5B is a unidirectional surface mount (SM) transient voltage suppressor. It has a peak power dissipation rating of 500 W. It is characterized by a working voltage of 6 V to 18 V, and a maximum working current of 5 A. It has a low breakdown voltage of 8.1V to 16.7V and high surge rating. The SM6T18CA-M3/5B has an excellent clamping performance and is capable of handling a high surge current up to 15 A for 8/20 μs pulse width. It is also very compatible with the ESD (electrostatic discharge) protection standards IEC61000-4-2 and mostly used for device level protection.

Application Field: It is commonly used in automotive, mobile, and consumer electronics such as computer peripheral devices, cameras, audio systems, etc. SM6T18CA-M3/5B can also be used for the protection of Data/Telecom applications, machines tools, circuits used in setting measurements and electrical home appliances.

Working Principle: The working principle of the SM6T18CA-M3/5B is very simple. It is designed to take the power supply rail voltage within its working voltage range and clamp it or shunt it to ground when a transient voltage or surge event occurs. This is done by applying a reverse biased voltage, known as avalanche voltage, across the diode. If the voltage across the diode exceeds this avalanche voltage, the diode will react by shunting or clamping the voltage to the ground.

The SM6T18CA-M3/5B is specially designed for applications that require high reliability and protection against power surges. It has a high power rating and can handle high surge currents up to 15 A for 8/20 μs pulse width. It also has a low clamping voltage, so it can be used in a variety of electrical applications.

In summary, the SM6T18CA-M3/5B is an ideal choice for applications requiring protection from high surge currents. It is designed to take the rail voltage of the equipment up to its working voltage rating and clamp or shunt it to ground when a transient voltage occurs. This diode is capable of handling high power ratings as well as high surge currents, and is compatible with ESD protection standards.

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