ECSR2512FR004K9 is a low resistance and current sense surface mount resistor manufactured by ResistorToday. It is a 3 watt, 2512 size resistor with a resistance value of 0.004 Ohms ±1%. It is RoHS (Restriction of Hazardous Substances) compliant, which means that it does not contain any hazardous chemicals or materials. It is suitable for use in a wide variety of electronic circuit designs and components. It provides an accurate measurement of current and voltage in relation to resistance and is important for circuit design. Its surface mount design makes it ideal for use on circuit boards with limited space. The temperature coefficient allows for predictable resistive performance stability.