VM474MK122R020P050

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Varistors are voltage-dependent, nonlinear, solid-state devices which react to relatively fast voltage changes on a power line and clamp or limit the voltage to protect the connected load. These devices are available in a variety of forms like modules, transient voltage suppression (TVS), metal oxide varistors (MOVs) and thermally protected varistors. The VM474MK122R020P050 belongs to the thermally protected varistor family. This family of varistors can protect against both high voltage as well as against overcurrent.

The operating principles of the VM474MK122R020P050 are similar to other TVS, MOVs and Varistors. When exposed to a voltage above the rated voltage, the VM474MK122R020P050 will conduct and clamp down the voltage to a safe level. This is an active device and requires a specific connection and voltage rating to protect connected circuits. The VM474MK122R020P050 is specifically designed to be integrated into power supplies, power lines, semiconductors, small motor load applications, and other circuits that are susceptible to overvoltage conditions.

The VM474MK122R020P050 features a robust solid-state design that can handle high currents or voltages and provides excellent protection against overvoltage, overcurrent, and short circuit incidents. The device utilizes a thermally desensitized zinc oxide as the varistor material, with a response time of less than 10ns and a capacitance rating of 1μF. The device has a maximum rated current of 400V, and a maximum peak pulse current of 125A. It is also UL and CSA recognized for industrial applications.

In general, the VM474MK122R020P050 serves as a device which can protect the connected load from voltage and current surges. The device uses its thermal protection feature to limit power dissipation and prevent thermal breakdown during overvoltage or overcurrent incidents. This feature helps to prevent the device from being damaged in the event of an overload. The robust design of the VM474MK122R020P050 makes it suitable for a variety of applications ranging from power line protection and semiconductor protection to motor load protection.

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