Current sense resistors or shunts are low value parts used to convert current to a small, proportional voltage with the minimum of power loss. TT Electronics has an extensive portfolio of current sense resistors with values extending below 1mΩ and rated at currents over 100A. For best accuracy these products should be connected by four connections, two for the current path and two for voltage sense, and four terminal types facilitate this.
Two main technologies are used for current sense resistors. Thick film on ceramic is used font lower current ranges up to a few 10s of amps and offers very low temperature rise and compact, standard chip sizes. Metal element, like OARS and LRMAP series, gives lower values, lower TCR and better surge performance. It can also be scaled up to large, off-PCB shunts, like EBW.
LRMAP3920