Panel-mounted AC output solid state relays and contacters are available in single-phase, dual-phase, and 3-phase configurations, rated for 5 to 150 amps at voltages 24 to 660 VAC. Ac solid state relays are designed to be mounted to metal plates or fins to consume the generated heat. The cooling fin selection chart is provided in the instruction manual of each AC output solid state relay. Ac output contactors are commonly used in 3-phase heaters and power switches for motors, but are not limited to these types of applications. Our solid state contactors also offer motors rated up to 25 HP (at 480 VAC voltage). Crydom AC panel-mounted solid state relays and contactors are an excellent alternative to electromechanical switchgear for applications requiring frequent switching and long service life.