The 25121WJ022KT4E is a surface mount resistor, manufactured by Uniroyal, that consists of 2512 individual, 1206 SMT chips. The resistor is RoHS certified, meaning that it has been developed to comply with the standards set by the Restriction of Hazardous Substances Directive and contains limited amounts of hazardous substances such as lead, mercury, cadmium, and hexavalent chromium. It is typically used in applications such as cell phones, automotive electronics, and other consumer electronics.