Motor starter with adjustable trip class and IP65 enclosure
The 3RK1304-5KS70-2AA0 is a SIMATIC-branded motor starter in a direct starter design, rated for 24 V DC supply (20.4 to 28.8 V range). It carries 4 digital inputs via M12 sockets and 2 bytes each of input and output process data, communicating over both PROFINET and PROFIBUS DP. The trip class is adjustable across CLASS 5, 10, 20, and 30 — meaning you can match the overload release curve to the motor's thermal time constant without swapping heater packs. This is useful when the same starter frame serves motors with different start-up profiles on the same line.
Physical fit and mounting constraints
Dimensions are 160 mm deep, 110 mm wide, and 230 mm tall — a compact footprint for a motor starter with integrated bypass and comms. Mounting is by screw fixing, with vertical or horizontal orientation allowed. Shock resistance is 15 g at 11 ms, vibration resistance 2 g — figures that place it in the range for machine-mounted gear on conveyors or packaging lines, not just in a fixed cabinet.
The lifecycle stage is listed as current — meaning Siemens still produces this order code as an active catalogue item.