The Siemens 3RW5545-2HA06 is a SIRIUS soft starter rated 200–690 V with a configurable trip class — default CLASS 10A / 10E, also settable to 20E or 30E per IEC 60947-4-2. That trip-class flexibility means you can match the thermal overload curve to the motor's starting profile: CLASS 10 for standard starts, CLASS 20 or 30 for high-inertia loads like centrifuges or crushers where the acceleration time exceeds 10 seconds. ATEX and IECEx certification are both listed (Yes), so this unit is cleared for installation in explosive-gas or dust atmospheres — a mandatory gate for Zone 1/21 or Zone 2/22 applications in chemical, oil-and-gas, or grain-handling lines. The IECEx mark also streamlines acceptance in most international jurisdictions without a separate local cert run. Fieldbus support covers PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP — you can drop this into a Siemens S7-1500 PROFINET island or a Rockwell ControlLogix EtherNet/IP chassis without a protocol-gateway adapter. PROFIenergy is also supported when paired with the PROFINET communication module, letting the drive participate in coordinated energy-management pauses during idle periods.
Panel footprint is 393 mm high × 210 mm wide × 203 mm deep. Clearance requirements: 100 mm above, 75 mm below, 10 mm forward, 5 mm at the sides, and zero behind — that zero backward clearance means it can sit flush against the backplane, saving rail depth. The screw-terminal option is not available (No), so plan for spring-cage or ring-lug terminations on the power block.