15KPA200-B Circuit Protection

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TVS (Transient Voltage Suppressor) diodes are components designed to protect other electronic components from overvoltage transients, such as those caused by lightning strikes, power line surges, and other electrical disturbances. The 15KPA200-B is a unidirectional TVS Diode, with a maximum standoff voltage of 200V; this means that it can be used in applications with up to and including 200V of voltage on the supply line. Its high surge current capability makes it particularly well suited for use on power line and data line circuit protection, and it can also be used as a reverse polarity protection device for AC/DC power supplies.

The 15KPA200-B is designed to operate as a three-terminal SCR, with one terminal connected to the surge voltage source, and the other two connected to the circuit to be protected. When an overvoltage surge appears on the terminal connected to the surge source, the 15KPA200-B will conduct current away from the protected circuit and neutralize the surge. This prevents the surge from damaging other components connected to the circuit.

The working principle of the 15KPA200-B is based on the two-stage breakdown of a zener diode. When the forward voltage across the diode reaches a certain threshold, the diode\'s internal resistance begins to decrease, allowing the zener diode to conduct more current than in its initial state. As the surge voltage increases, the zener diode continues to conduct the current, creating a voltage drop across the surge source which neutralizes the surge. This process is repeated until the zener diode is completely saturated, at which point its current-handling capacity reaches the diode\'s given maximum.

The 15KPA200-B is ideal for protecting power line circuits, AC/DC power supplies, and data line circuits from overvoltage surges. Since it is unidirectional, it can also be used as a reverse polarity protection device for AC/DC power supplies. The diode\'s high surge current capability makes it particularly well suited for less-than-ideal conditions, such as those caused by lightning strikes and other electrical disturbances.

In conclusion, the 15KPA200-B is a robust, unidirectional TVS diode, with a maximum standoff voltage of 200V and a maximum surge current capability of 200A. It is designed to protect other electronic components from overvoltage transients and function as a reverse polarity protection device for AC/DC power supplies. The 15KPA200-B is well suited for use in a variety of applications, ranging from power line and data line circuit protection to lightning surge protection.

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