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The Siemens SIRIUS 3RW4046-1BB04 Soft Starter provides reliable and efficient motor starting for applications up to 45 kW (400 V). Designed in size S3, this soft starter limits the inrush current and reduces mechanical stress on motors and connected equipment, extending operational lifetime.
Equipped with integrated bypass contacts, it ensures energy-efficient operation during the run phase and minimizes heat dissipation inside control panels. The 3RW40 series features two-phase control, built-in overload protection, and simple parameterization, making it ideal for pumps, fans, and compressors.
With screw terminals, a control voltage of 24 V AC/DC, and rated operational voltage up to 480 V AC, this device is a robust, compact solution for soft motor starting in industrial automation and process control environments.
| Specification | Details |
|---|---|
| Range of Product | SIRIUS 3RW40 |
| Product or Component Type | Soft Starter |
| Device Short Name | 3RW4046-1BB04 |
| Applications | Motor starting for pumps, fans, compressors, conveyors, and general-purpose drives |
| Utilization Category | AC-53a |
| [Ue] Rated Operational Voltage | 200–480 V AC |
| [Ie] Rated Operational Current | 80 A |
| Rated Motor Power (at 400 V) | 45 kW |
| Control Supply Voltage | 24 V AC/DC |
| Connection Type | Screw terminals |
| Bypass | Integrated |
| Operating Temperature | Up to 40 °C (nominal) |
| Mounting Size | S3 |
| Net Weight | 1.875 kg |
| Dimensions (L x W x H) | 218 x 182 x 91 mm |
| Product Lifecycle | Active |
| Product Class | A – Standard product (returnable) |