Chip Resistors Reduce Form Factor

TT Electronics’ MFC series of metal foil chip resistors for current sensing duties in power electronics applications provide a combination of high power density, tolerance of surge conditions, and stability. They are suitable for use in power supplies, dc/dc convertors, small motor drives, actuator drives, and lighting drives with current sense requirements in the 1A to 10A range. MFC resistors are 0603 size rather than the much larger 1206 or 2010 size required for a thick-film product of the same rating, thus saving valuable PCB space. The resistors measure just 1.6 x 0.8 x 0.6 mm, and they feature wrap around terminations on three faces that have an electroplated nickel barrier and tin finish. Standard values of 5, 7, 9, 10 and 20 mΩ are available, featuring a tolerance figure of ±1%, and a 0.5W power rating at 70°C.  The resistors’ operating temperature is a wide -55 to +155°C, and their low TCR of ±50ppm/°C maintains accuracy over a wide range of operating currents and ambient temperatures. A datasheet is available at


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