Siemens SIRIUS 3RW301 Series Soft Starter 3.6-17.6A 1.5-7.5kW 200-480V AC S00

Product Description

The Siemens SIRIUS 3RW301 series is a compact soft starter range designed for smooth starting and stopping of three-phase motors in industrial applications. The series covers rated operational currents from 3.6 to 17.6 A and supports motors from approximately 1.5 to 7.5 kW at 400 V, depending on the selected variant. With a main operating voltage range of 200 to 480 V AC, the 3RW301 uses two-phase motor control and hybrid switching technology to reduce mechanical and electrical stress during motor acceleration. An integrated bypass contact system minimizes power losses after startup, while front-mounted potentiometers allow simple commissioning and adjustment.

Standard Features

• 3.6–17.6 A product range: Available in multiple current ratings for small three-phase motor applications.
• Up to 7.5 kW @ 400 V: Supports motor loads from approximately 1.5 to 7.5 kW depending on variant.
• 200–480 V AC operation: Suitable for a wide range of industrial three-phase power systems.
• Two-phase motor control: Reduces starting current and mechanical stress during motor acceleration.
• Hybrid switching technology: Combines semiconductor switching with bypass contacts for efficient operation.
• Integrated bypass: Reduces power losses and heat generation after the motor reaches full speed.
• Potentiometer adjustment: Enables simple setup of starting parameters directly on the front of the device.

Technical Specifications