The SMM02040C2490FB300 is a MELF resistor with a 1/4 watt rating and a value of 249 ohms with a tolerance of 1%, produced by Vishay. It is a metal-film, surface-mount resistor with high reliability, and is made of manganin, providing an excellent temperature coefficient of 50 ppm. It has a wrap-around style case, which ensures the resistor will stay in place, and is ideal for applications which require high stability and accuracy. This resistor is designed for use in high-temperature environments and is RoHS (Restriction of Hazardous Substances) compliant.