Siemens 3RK1304-5KS40-5AA3 Soft Starter Module

Siemens 3RK1304-5KS40-5AA3 is an ET 200pro RSE ST reversing motor starter module that combines mechanical switching with electronic overload protection for 400 V AC networks. It provides reversing start capability and includes a motor brake output, making it suitable for applications requiring controlled start, stop, and reverse operation in compact enclosures. The unit is rated for 0.9 kW at 400 V (AC-3) and supports a continuous current range of 0.15 to 2.00 A, with brake control specified at 400 V AC and a 400 V AC brake contact. Short-circuit protection is fuse-based, with a rated breaking capacity up to 100 kA at 400 V. Weighing about 1.96 kg, the module is designed for integration within the ET 200pro family. Additional technical data include insulation voltage 400 V, surge voltage resistance 6 kV, and a mechanical service life for the main contacts of approximately 30 million operating cycles. The product designation identifies it as the reversing starter variant of the ET 200pro line, with reverse starting supported and direct starting not configured for this model, making it well-suited for panel builders and OEMs needing integrated motor protection, braking, and reversing capabilities in a single compact unit.