SIEMENS 3RH1921-1FA40 Attachable Blocks NO 4-Pole

SIEMENS contactors of size S00 with one auxiliary contact (Ident. Nos. 10 or 01) and contactors with 4 main contacts can be expanded into contactors with 3 or 5 auxiliary contacts using auxiliary switch blocks with the Ident. Nos. 40 to 02 (in the case of contactors with 4 main contacts: 2 or 4 auxiliary contacts) according to EN 50005.The Ident. Nos. on the auxiliary switch blocks only apply to the attached auxiliary switches. Single or 2-pole auxiliary switch blocks with only one connection option from above or below are provided for easy and clearly arranged wiring, especially for the installation of feeders. 3RH1921-1FA40 auxiliary switch blocks are offered only with screw terminals. The auxiliary switch blocks attached to the front can be dis-assembled with the help of a centrally arranged release lever; the laterally attached auxiliary switch blocks are easy to remove by pressing on the checkered surfaces.