MFC Chip Resistors Welwyn / TT Electronics MFC Chip Resistors are metal foil on ceramic chip resistors in 0603 and 2817 sizes. These MFC resistors are available in 2mΩ to 100mΩ resistance ranges. Welwyn MFC Chip Resistors provide a high power rating of 500mW. This high power rating makes these resistors ideal for highly compact current sensing in the 1 to 10A range. The MFC series resistors are ideal for industrial and medical segments of the market and can be used in power supplies, DC-DC converters, and lighting drivers.