The E39-RS4 is a type of Omron relay that features an external reset. It has a rated coil voltage of 12VDC and a contact arrangement with 4 normally-open (NO) and 1 normally-closed (NC) connection. It also has a maximum contact capacity of 15A at 125VAC; 10A at 250VAC; 0.2A to 1A at 125VDC; and 0.1A to 5A at 250VDC. It has a mechanical life expectancy of 10 million operations and a minimum switching frequency of 10 operations per minute. This relay also features safety construction to assure quality and reliable performance.