ATEX and IECEx certified soft starter for hazardous-area motor control
The 3RW5524-1HA04 carries both ATEX and IECEx certification, meaning it can be installed in Zone 1 or Zone 2 hazardous areas without an additional explosion-proof enclosure for the starter itself — the certification covers the device as part of the motor circuit. Rated 200-480 V, this unit covers the common global industrial voltage band from 208 V North American to 400 V European and 480 V heavy-industrial feeds, with a single soft starter order code that avoids voltage-range variants. Trip class is selectable between CLASS 10A, 10E (default), 20E, and 30E per IEC 60947-4-2 — the 10A setting protects standard squirrel-cage motors with short acceleration times, while 30E handles high-inertia loads like centrifuges or crushers that need a longer ramp.
Fieldbus connectivity and commissioning flexibility
Built-in support for Modbus RTU, Modbus TCP, EtherNet/IP, and PROFIBUS means this soft starter talks directly to the most common PLC networks without an external gateway — the integrator picks the protocol at commissioning, not at ordering. The analog output can be configured for 4-20 mA or 0-10 V, feeding motor current or torque data to a remote SCADA or drive controller without an additional signal conditioner. PROFIenergy support (via PROFINET communication modules) allows the soft starter to participate in energy management profiles during idle periods — useful for production lines that cycle between active and standby states.
Active production and sourcing posture
Global approvals include UL, CSA, and CE marking, covering North American and European regulatory acceptance without additional certification steps.
Panel integration and environmental limits
Dimensions are 185 mm wide, 306 mm high, and 203 mm deep — the unit fits a standard 600 mm deep enclosure with clearance for wiring and cooling. Minimum clearance requirements: 100 mm above, 75 mm below, 10 mm front, 5 mm sides, 0 mm rear. Screw terminals for power and control wiring — no special crimp tooling needed, and the terminal layout matches the standard Siemens 3RW5 family footprint for panel retrofit.