The CA4KN31BW3 is a 4-pole TeSys K Control Relay with DC coil and 3NO-1NC power pole contact composition. Built-in bidirectional peak limiting diode suppressor. TeSys K forms a complete range of reversing or non-reversing contactors, offering the best performance/compactness ratio and seamless integration in all applications. Zones sensitive to noise, disturbed mains supplies silent contactor, use compatible with programmable controller outputs low-consumption contactor.