The Siemens 3RW5073-6AB14 is a SIRIUS hybrid soft starter rated for a minimum setting current of 100 A, with a rated operational voltage of 200 to 480 V. The 100 A floor means it is sized for motor loads drawing at least that current at full load — smaller motors need a different frame. The 200-480 V range covers standard low-voltage three-phase supplies across 50/60 Hz networks. Trip class is selectable between CLASS 10A, 10E (preset), and 20E per IEC 60947-4-2, so you can match the thermal overload curve to the motor start profile: 10A for normal starts, 10E for slightly longer ramps, 20E for high-inertia loads like fans or centrifuges. The unit includes voltage ramp and soft torque profiles for gentle acceleration, plus pump ramp down to prevent water hammer on stopping. Analog output defaults to 4-20 mA, parameterizable to 0-10 V with the High Feature HMI accessory.
Mounts via screw fixing with dimensions of 160 mm wide, 230 mm high, and 282 mm deep. Clearance requirements: 100 mm above, 75 mm below, 10 mm forward, and 5 mm at the sides — no space behind. This fits a standard 600 mm deep enclosure but plan for the 100 mm top clearance to avoid heat buildup from the power section. Communication options include PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP. PROFINET support is available via the standard communication module, which also enables PROFIenergy for energy management during idle phases. The unit supports auto-reset and remote reset by cycling the control supply voltage.
Certifications and compliance
Carries ATEX, UKEX, IECEx, CE, UL, and CSA approvals — suitable for hazardous-area installations, North American panels, and global export.