The CRCW0603649RFKEA is a thick-film resistor manufactured by Vishay. It is an SMD (surface-mount device) and has a power rating of 1/10 watt. The resistance is 649 ohms with a tolerance of 1%. It's intended applications are to be used as current sensing, line termination, voltage divider, and voltage dropping element in high-density circuit boards. The structure is made up of a thick film resistive element which is printed onto a ceramic substrate. It also includes a protective passivation layer to protect it from moisture and mechanical stresses. It offers excellent heat resistance, high stability, low ESR (equivalent series resistance), and low inductance that makes it suitable for high-frequency applications.