SMCJ20A-TR Circuit Protection

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The SMCJ20A-TR, a type of TVS/Diodes, is used primarily to protect sensitive electronics against transients and over-voltage. It is designed to absorb and dissipate up to 20 watts of energy to minimize damage caused by electrical transients. The SMCJ20A-TR offers superior performance in both over voltage immunity and electrostatic discharge, with low junction capacitance for minimal signal degradation.

The body of the SMCJ20A-TR is made of a special PN junction epoxy package, which is designed to be both mechanically and electrically robust. The package is attached to a printed circuit board (PCB) via surface mount technology. The package of the SMCJ20A-TR has four mounting holes, which are used to securely attach the device to the PCB.

The SMCJ20A-TR features a low clamping voltage, which is important in helping to extend the life of printed circuit boards and other sensitive electronic components. The device can handle up to 200 volts of transient voltage, and the integrated circuitry ensures that voltage spikes are reduced to a tolerable level quickly.

The internal construction of the SMCJ20A-TR allows it to perform its primary function: suppressing electrical transients. This is achieved by a combination of two main components, an avalanche diode and a suppressor diode. An avalanche diode is a highly reverse-biased semiconductor device which contains a depletion region that will conduct current when a certain voltage threshold is exceeded. The suppressor diode is used to clamp any voltage over the threshold to a safe level.

When an electrical transient is detected, the avalanche diode is triggered and will conduct the excess voltage. This voltage is then clamped by the suppressor diode. The avalanche diode will then quickly return to its original state, and the transient voltage spike will be dissipated. The transient energy is then dissipated as heat, and the clamping voltage is restored.

The SMCJ20A-TR is an ideal choice for applications where protection from high voltage spikes is required. It is suitable for high voltage transients up to 200 volts, and can handle up to 20 watts of energy. This ensures durable protection for sensitive electronic components, and can operate at temperatures between -55 and 150 degrees Celsius.

In summary, the SMCJ20A-TR is a type of TVS/Diodes used to protect against transients and over voltage. It is constructed with an epoxy package with surface mount technology, and includes an avalanche diode and a suppressor diode. The device features a low clamping voltage, and can handle up to 200 volts of transient voltage. The SMCJ20A-TR is suitable for a wide range of applications, and offers superior performance in both over voltage immunity and electrostatic discharge.

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