SMS12C.TCT Circuit Protection

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TVS - Diodes: SMS12C.TCT Application Field and Working Principle

TVS (Transient Voltage Suppressor) diodes are semiconductor components used to protect sensitive electronic devices from voltage transients (electrical overvoltage phenomenon). The SMS12C.TCT is a unique combination of several protection technologies made available in a single package. It is used in various applications where the system needs to be protected due to the frequent occurrence of voltage transients. It offers high energy absorption capabilities and excellent ESD immunity, making it ideal for purposes such as protecting cellular phones, semiconductor integrated circuits, power supply ports, laptop computers, and even medical devices.

Applications

The SMS12C.TCT is mainly used for transient protection in portable and handheld wireless communication devices, such as smart phones, tablets, and personal digital assistants (PDAs). It is also used for ESD protection in computer peripherals such as keyboards and pointing devices, and in consumer appliances and electronic modules. Apart from that, it is also suitable for surge, surge clamp, and line termination protection in data communication ports such as RS232, LAN, two-wire serial interfaces, and USB ports.

Working Principle

The working principle of the SMS12C.TCT is based on an ESD protection technology called “avalanche breakdown”. When the voltage rises above the breakdown voltage of the device, it triggers a current flow into a region in the device called the “depletion layer”. This current flow in the depletion layer causes a further rise in voltage, resulting in an avalanche breakdown and an increase in current. This current is then dissipated as heat, thereby limiting the voltage across the diode and protecting the device from any further overvoltage.

The SMS12C.TCT is specifically designed to provide superior ESD protection by offering additional protection features such as high clamping voltage, low leakage current, low forward voltage drop, and low capacitance. The device is designed to absorb high transient energy levels up to 8A and surge current up to 10A.

Conclusion

The SMS12C.TCT is a versatile and highly efficient device that offers various applications and features making it ideal for protecting and safeguarding sensitive components from voltage transients and surges. Its high energy absorption capability and excellent ESD immunity make it the ideal choice for protecting electronic systems from voltage transients and surges. Therefore, it is a necessary component for designers and developers when creating or using electronic devices.

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