Motor circuit protection for the wet end
The Siemens 3RV2041-4KA10-0DA0 is a SIRIUS 3RV2 motor starter protector in the size S3 frame, rated for a thermal overcurrent release of 57-75 A and a magnetic short-circuit release of 975 A. Screw terminals, standard switching capacity, no phase-failure protection built in.
The packaging dimensions are 191 x 172 x 78 mm, so it occupies roughly three 9 mm module-widths on the rail — plan for a 54 mm slot minimum plus finger-duct clearance on the load side. Screw terminals accept 2.5-35 mm² conductors depending on the lug kit; torque the line and load connections to the nameplate value, usually around 4.5 Nm for the main circuit.