Series SSR Solid State Relays amplify the current handling capability of a variety of sensors for controlling higher power loads. The relays are compact, totally encapsulated and impervious to shock or vibration. Units feature SPST, normally open switch operation and can control loads up to 5A or 10A depending on model. Models SSR-312 and SSR-324 are specifically designed to provide low current “start-stop” or “on-off” switching for industrial motor, liquid level, and other control systems. Units hold operational state up to a 1/2 second during momentary power loss to cut nuisance shutdowns.