What this 160 A soft starter brings to a motor control panel
The Siemens 3RW5075-6AB05 is a hybrid soft starter from the SIRIUS family, rated for a minimum motor current of 160 A and a supply voltage range of 200 to 600 VAC. It carries ATEX and IECEx certification, meaning it is approved for use in explosive atmospheres — a requirement that narrows the field of suitable soft starters considerably. The Trip Class is preset to CLASS 10A or 10E, with CLASS 20E also selectable per IEC 60947-4-2, so it matches motor protection curves for standard and heavy-start applications. This unit supports PROFIBUS, Modbus RTU, Modbus TCP, and EtherNet/IP natively, plus PROFINET with the standard communication module. That fieldbus flexibility means it slots into most existing control architectures without a gateway. The analog output is configurable as 4-20 mA or 0-10 V, settable via the High Feature HMI accessory. Mounting is screw-fixed to a vertical surface, rotatable ±90° and tiltable ±22.5° front-to-back. The enclosure dimensions are 230 mm high, 160 mm wide, and 282 mm deep — plan the panel depth accordingly.
Screw-fixing to a vertical mounting surface is the standard method. The unit is rotatable ±90° and tiltable ±22.5° front-to-back, which helps when fitting into a crowded enclosure. Minimum clearances: 100 mm upwards, 10 mm forwards, 75 mm downwards, 5 mm at the sides — respect those for airflow and cable bending radius. The control supply is 24 VDC. Remote reset is achieved by cycling the control supply voltage off and on. The minimum load is 15% of the smallest settable Ie, so light-load applications may need a bypass contactor to avoid nuisance tripping. Shock resistance is rated at 15 g / 11 ms, dropping to 12 g / 11 ms if potential contact lifting is a concern. The service factor is 1 — no overload margin beyond nameplate rating.