V220MT4B Circuit Protection

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The V220MT4B is a varistor (voltage-dependent resistor) used in various electrical and electronic devices. Its application field for transient voltage suppression includes surge protection, AC/DC adapter surge protection, automotive applications, and industrial equipment.

The V220MT4B is a metal-oxide varistor (MOV) with an over-voltage protection threshold of 27V. Its maximum operating voltage, or clamping voltage, is 220V. This MOV offers a low maximum current rating of 4A, which makes it well suited for the protection of light-duty circuits. Additionally, it has a fast response time and can handle up to 400A of surge current.

The working principle of the V220MT4B is based on the voltage-dependent resistance property of the MOV material. When the supply voltage reaches or exceeds the protection voltage, the voltage-dependent resistance property of the MOV causes the device to begin conducting current. This reduces the voltage to a level that will not damage the circuit. The device will remain in this state until the voltage is reduced lower than the protection voltage. Then, the device will return to its original state and be ready for the next surge event.

The V220MT4B is a useful and inexpensive device for providing surge protection in many applications. It is easy to install and can provide reliable protection for AC/DC adapter, automotive, surge protector, and industrial equipment. This device can help protect delicate electronic components and extend the life of expensive equipment.

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