3RW5535-6HA04 Siemens Soft Starter 200-480 V 143 A, 24 V AC/DC Screw Terminals

Description

The Siemens SIRIUS 3RW5535-6HA04 Soft Starter is a high-performance hybrid switching device for the gentle starting and stopping of three-phase induction motors. Operating at 200–480 V with a rated operational current of 143 A (or up to 248 A in inside-delta configuration), it delivers up to 75 kW at 400 V and supports a wide range of industrial applications.

It features adjustable start/stop ramps (0–360 s), torque limitation (20–200 %), and current limiting (125–800 %), providing precise control over motor acceleration and deceleration. Integrated functions include ramp-up/ramp-down, DC braking, pump stop, reversing, creep speed, and condition monitoring.

The device supports multiple communication protocols—including PROFINET (standard & high-feature), PROFIBUS, Modbus RTU/TCP, and EtherNet/IP—for seamless integration into automation systems. It offers analog output (4–20 mA / 0–10 V), programmable I/Os, and firmware update capability.

With full motor overload and thermistor protection, ATEX/IECEx certification, and a service factor of 1.15, the 3RW5535-6HA04 ensures reliable operation in demanding environments. Its compact design (306 × 185 × 203 mm), IP20 protection with cover, and screw terminal connections make installation straightforward.

Ideal for applications requiring controlled motor starts and stops, reduced mechanical stress, and energy-efficient operation, this soft starter exemplifies Siemens’ robust SIRIUS control technology.