Panel fit and clearance — what the dimensions mean for the enclosure
The 3RW5072-2AB05 measures 282 mm deep by 160 mm wide by 230 mm high, fastened with screw fixing to a vertical mounting surface. Clearance requirements: 5 mm at the side, 100 mm upward, 10 mm forward, 0 mm backward, and 75 mm downward — the zero backward clearance means the back of the unit can sit flush against the panel backplate, saving depth in shallow enclosures.
Hazardous-area certification — ATEX and IECEx for Zone applications
Both ATEX and IECEx certifications are listed, meaning this soft starter is approved for use in potentially explosive atmospheres per the ATEX Directive and IECEx Scheme — a requirement for oil & gas, chemical, or grain-handling installations.
Motor starting profiles — trip class and ramp functions
Trip class is selectable as CLASS 10A, 10E (preset), or 20E per IEC 60947-4-2 — this determines how long the starter can sustain locked-rotor current before tripping, with CLASS 10 being the standard for most motor starts and CLASS 20E allowing longer acceleration for high-inertia loads. Voltage Ramp and Soft Torque starting profiles are available, along with Pump Ramp Down for controlled deceleration on pump applications to prevent water hammer. Minimum load is 15% of the smallest settable Ie, so the unit can handle light-load starts without nuisance tripping — useful for unloaded conveyors or centrifugal pumps starting against a closed valve.
Fieldbus connectivity — which networks are supported
The 3RW5072-2AB05 supports PROFIBUS, Modbus RTU, Modbus TCP, EtherNet/IP, and PROFINET (with PROFIenergy capability via the PROFINET standard communication module), covering the major industrial Ethernet and fieldbus protocols for integration into most control architectures.
Thermal environment — operating range and derating
Shock resistance is 15 g for 11 ms, with potential contact lifting noted above 12 g — relevant for installations on vibrating machinery or near crushers.