ABB 1SBH143061R5144 is the TNL44E auxiliary contactor (Hilfsschütz) from ABB, used to provide auxiliary contacts in three-phase motor control systems. It operates on 17–32 V DC and features eight contacts: four normally open and four normally closed, enabling complex interlocks and signaling in control circuits. This self-latching device holds its state in the control circuit without continuous coil power, typically used alongside a main contactor to implement interlocks or holding functions. As part of the ABB 1S/1SBH family, this part extends control capability in industrial motor starters while keeping the main current path unaffected.
