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The Arc 200 MOSFET Small Card is a vital internal component used in modern inverter-based welding machines, specifically in the Arc 200 series. This card, often referred to as the small control board or MOSFET small card, plays an essential role in the regulation and management of electrical signals that control the machine’s output, ultimately ensuring smooth, efficient welding performance.The MOSFET small card utilizes MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) technology to control high-frequency switching. MOSFETs are highly efficient in handling high power and are more reliable and faster than traditional components like thyristors, making them perfect for inverter-based welders.