The LRAN12SFTR040 is a 0.5 watt 40mO ±1% 1206 current sense resistor/shunt resistor, designed to measure current flow in a circuit. It is a leaded, surface-mount device made from high-grade, flame-resistant, RoHS compliant material. The resistance is accurate to within ±1% and its operating temperature range is -55°C to +125°C. The LRAN12SFTR040 can be used in many different types of circuits, such as LED drivers, automotive DC/DC converters, battery charging systems, over-current protection circuits, and many others. The small size makes it suitable for high-density circuit boards.