MCR03EZHJ363 is a Resettable Fuse, manufactured by ROHM. It is an electronic fuse that has an over-current detection circuit, current-limiting circuit, and a self-resetting circuit, all in one single device. It has a low thermal resistance, and its power rating is 100mW. The max RMS current is 3.63A, and the max peak current is 5.67A. Its operating temperature range is -40 to +85°C. It is commonly used in high-current applications such as automotive electronics and computer systems.