SMC3K75CA-M3/57

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TVS - Diodes – SMC3K75CA-M3/57 Application Field and Working Principle

Transient voltage suppressor diodes (TVS), also known as protective diodes, are electronic devices designed to limit voltage and absorb electrical transients, such as those produced by lightning, power switching surges, and electrostatic discharges. These devices provide protection against possible damage caused by such events.

The SMC3K75CA-M3/57, for instance, is a three-terminal, bidirectional transient voltage suppressor designed to protect high-speed signal lines or low-voltage systems against ESD and transient over-voltage events. This specific diode is provided in a small plastic SOT23 package and is ideal to be used in end-product applications to protect very sensitive devices, such as memory cards, which might otherwise be damaged by sudden surges or ESD.

The main working principles of TVSs are based on two characteristics: the breakdown voltage and the maximum clamping voltage. The breakdown voltage is basically the voltage at which the diode can be activated, meaning it starts conduction. When applied with a voltage higher than the breakdown voltage, the diode will start conducting, turning the excess voltage into heat and protecting the device from possible damages.

The second characteristic is the maximum clamping voltage, which limits how much voltage will travel from one terminal to the other. This voltage is related to the power dissipation on the diode, thus, the higher the voltage, the higher the dissipation.

On the other hand, the SMC3K75CA-M3/57 application fields include:

• Computer peripheral interfaces
• Consumer electronics
• Data transceivers
• Industrial application control
• Networking equipment
• Portable equipment
• Telecommunications.

At the same time, the SMC3K75CA-M3/57 offers an excellent combination of transient and ESD protection for voltage sources up to 5.5V and has a peak pulse current of 3A (8/20ns). It\'s breakdown voltage is between 14.3V and 32.4V.

Finally, the applications where the SMC3K75CA-M3/57 can be used include SCSI external port protection, USB port protection, cellular telephone protection, connector protection, line protection against lightning strikes, power supply lines protection, and printer interface protection.

TVSs such as the SMC3K75CA-M3/57 are crucial devices for today’s electronic systems, as they’re able to protect extremely sensitive electronics from any sort of transients or surges that might end up damaging them.

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