Schneider Electric Telemecanique CA3-DN40FD Control Relay

The Schneider Electric Telemecanique CA3-DN40FD Control Relay delivers reliable auxiliary switching in industrial control circuits, powered by a 110 V DC coil and configured with four normally open contacts. This 4-pole device is commonly installed in motor control centers, control panels, packaging machinery, conveyors, and process equipment where dependable auxiliary signaling and PLC interfacing are essential. Key specifications include coil voltage 110 V DC (coil code FD), conventional thermal current Ith 10 A, contact configuration 4 NO, maximum switching voltage 600 V AC, rated insulation voltage Ui 1000 V, and rated impulse withstand voltage Uimp 8 kV. It is designed for instantaneous operation with screw clamp terminals and offers flexible mounting on 35 mm DIN rails or panel surfaces. Part number CA3DN40FD (CA3-DN40FD) belongs to Schneider Electric’s CA3 Series, suitable for auxiliary switching, machine sequencing, interlocking, and signaling in industrial automation across manufacturing equipment, material handling systems, HVAC installations, and process control panels. Common replacements listed include CA3KN40FD TeSys K, CAD40FD TeSys D, and CAD50FD TeSys D.