The RG..M series of one-phase solid-state relays and contactors offer integrated monitoring features. It consists of solid-state switches that integrate monitoring features for quick and timely failure detection in addition to the switching function. Timely failure detection eliminates the need for rework and prevents scrap. Detection for mains loss, load loss, SSR open and short circuit, SSR internal fault and supply out of range are possible without external components. The contactors and relays are equipped with an alarm LED for visual indication of fault presence and an alarm transistor output for remote signaling.