SMBJ20A Circuit Protection

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Transient Voltage Suppression (TVS) diodes, such as the SMBJ20A, are commonly used as overvoltage protection devices that can protect circuits from momentary electrical transients. The SMBJ20A is an unidirectional device, meaning that it will only pass current in one direction. The device features a breakdown voltage of 20 volts, as well as a maximum surge current rating of 200 Amps.

The application field of the SMBJ20A is primarily electrical protection in various types of electronic equipment. It can be used in portable and desktop computing equipment, consumer electronic products, automotive products, industrial equipment, telecom/datacom equipment, and instrumentation/measurement equipment. As such, it is a versatile device that can be used in a variety of different application areas.

The working principle of the SMBJ20A is based on its ability to suppress overvoltage transients. When an overvoltage condition is introduced to the circuit, the TVS diode begins to conduct. The device will begin to conduct at a voltage slightly higher than its typical operating voltage, but lower than its maximum voltage rating. This allows the device to absorb the transient energy and thus provide protection to the circuit from damaging overvoltage.

Once the transient has passed, the device will return to its off-state and the circuit will be protected from any further overvoltage conditions. In the off state, the SMBJ20A does not affect the normal operation of the circuit. It only comes into action when an overvoltage condition is detected.

The SMBJ20A is an ideal device for overvoltage protection in a wide variety of applications. Its small size, low cost, and robust design make it an ideal choice for circuit designers who need reliable overvoltage protection for their designs. The device is easy to use and provides protection from the often damaging effects of transient voltage spikes on the circuit.

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