This is a 0603 (1.6mm x 0.8mm) surface-mount resistor, manufactured by ROHM Semiconductor. It features SMD (Surface Mount Device) technology, and is designed for use in small, low-profile circuits, such as those found in portable electronics and automotive systems. The ESR03EZPF1001 has a generous resistance of 1Kohm (1000 Ohm), tolerance of 1% and a rated surge voltage of 200V. It is also AEC-Q200 compliant, meaning it meets the requirements set by the Automotive Electronics Council for superior quality. In addition, the ESR03EZPF1001 is composed of thick-film resistor technology, offering robust performance in the face of harsh environmental conditions.