Siemens Stepper Motors & Controllers Soft starter 613804 - Siemens 3RW40241BB04, The Siemens 3RW4024-1BB04 soft starter is designed for motor applications with a power of 5.5 kW at 400 V and a nominal current of 12.5 A, making it ideal for gently starting motors to reduce mechanical stress. This product enhances the longevity and efficiency of industrial machinery by mitigating electrical and mechanical overloads during start-up. Typical applications include pumps, fans, and conveyor systems where controlled acceleration and deceleration are crucial. Siemens 3RW4024-1BB04 SIRIUS soft starter 5.5 kW 12.5 A 400-600 V