90 A minimum, 200-480 V — the motor current floor decides fit
The Siemens 3RW5243-6TC04 is a SIRIUS hybrid soft starter with a minimum settable motor current of 90 A. The input voltage range spans 200 to 480 V. Trip class is configurable: default Class 10A for standard starts, or Class 10E and 20E for higher-inertia loads like centrifuges or long conveyors. That flexibility keeps the starter from nuisance-tripping on a heavy ramp-up while still protecting the motor per IEC 60947-4-2.
Fieldbus fit: Modbus TCP, PROFIBUS, EtherNet/IP — pick your network
This soft starter ships with onboard support for Modbus RTU, Modbus TCP, PROFIBUS, and EtherNet/IP — no option card needed for those four. It also carries PROFINET standard and PROFIenergy capability when paired with the PROFINET communication module. That means it drops into a Siemens-centric line or a mixed-vendor control architecture without a gateway. Clearance requirements: 100 mm above, 75 mm below, 10 mm forward, 5 mm at the sides, 0 mm backward. The 393 x 210 x 203 mm envelope means it fits in a standard 800 mm enclosure with room for a main disconnect above.
Active production — no end-of-life watch needed
Shock resistance is 15 g / 11 ms, with potential contact lifting at 12 g / 11 ms — relevant if the panel is mounted on a vibrating pump skid or near a reciprocating compressor.