V48MLA1210NH Circuit Protection

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The V48MLA1210NH is a varistor, a specific type of voltage-dependent nonlinear resistor. Varistors, also referred to as voltage-dependent resistors or MOVs (metal oxide varistors), are used in applications where the absolute maximum operating voltage must be established securely, such as for surge protection. A varistor works by providing a low resistance when the voltage applied is low, usually below a breakdown voltage. As the voltage increases, the resistance increases sharply. This makes the varistor an ideal choice for applications such as those where surge protection is required.

The V48MLA1210NH is a metal oxide varistor, or MOV. This type of varistor is composed of a sintered mixture of zinc oxide particles, which are held together by a ceramic media. This combination provides a highly reliable and stable device. The V48MLA1210NH has a breakdown voltage of 118V, with a maximum operating voltage of 202V. Additionally, it has a maximum peak current of 150A over an 8/20μs pulse, and a maximum peak pulse voltage of 385V. It also has a capacitance of 71pF at 1kHz.

The V48MLA1210NH is designed for use in overvoltage protection applications such as surge arrestors, UPS systems, and AC power lines. It is capable of handling large spikes in current, up to 150A over an 820μs pulse, while its high insulation resistance and low leakage current make it an ideal choice for a wide range of applications. Additionally, its low capacitance enables a faster response time when a surge is detected.

The working principle of the V48MLA1210NH is based on the voltage-dependent characteristics of the sintered zinc oxide particles it is composed of. When the voltage across the MOV is below the breakdown voltage, the particles act as an open circuit, allowing no current to flow. As the voltage passes the breakdown voltage, the conductivity of the particles increases, creating a low resistance path for current to flow. This low resistance allows excess current to flow through the MOV, rather than through the rest of the circuit. The low resistance also causes a “clamping” action on the voltage, preventing it from exceeding the breakdown voltage.

In summary, V48MLA1210NH is a metal oxide varistor that is used in overvoltage protection applications. It has a breakdown voltage of 118V and a maximum operating voltage of 202V. It is capable of handling large spikes in current, up to 150A over an 8/20μs pulse, while its low capacitance enables a faster response time. Its working principle is based on the voltage-dependent characteristics of the sintered zinc oxide particles it is composed of.

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