Most solid state relays are used in one of three basic applications, heating, lighting and motion control. The largest applications segment for AC output solid state relays and contactors is heating. Applications include, but are not limited to, professional food equipment, plastic molding or extrusion machinery, HVAC&R and soldering equipment. Benefits include temperature accuracy, long life, no maintenance, safety, easy to interface and are suitable for compressors soft-start, heaters, fans, blowers and valve control.