Medium Frequency Direct Current (MFDC) resistance welding transformers are essential devices for converting high-frequency electrical energy into low-voltage direct or alternating current, which is required for the welding process. This approach improves energy efficiency, accuracy, and weld quality, as well as reducing heat loss. They are widely used in the automotive industry and in applications requiring fast and controlled welding cycles. MFDC transformers facilitate more stable and uniform soldering due to rapid response and low impedance.