Schneider Electric LADN403 Auxiliary Contact Block

The LADN403 is Schneider Electric’s TeSys Deca instantaneous auxiliary contact block offering four normally open (4 NO) contacts, designed as a front-mounting accessory for TeSys Deca control gear. It uses spring terminals for wiring and is compatible with TeSys Deca contactors such as LC1D-series devices and related control relays, enabling additional signaling contacts without adding to the main current path. With four NO contacts, the block provides multiple dry-contact outputs that can feed PLC inputs, interlock logic, or status indication while keeping the main load circuit unchanged. This compact auxiliary block is intended to mount on TeSys Deca assemblies, aligning with Schneider Electric’s modular approach to control components and simplifying wiring with its spring-terminal connection for 2.5 mm² conductors.