3RW4047-1BB05 S3 106A 600V 24V screw

Description for 3RW4047-1BB05 S3 106A 600V 24V screw

supply, with integrated bypass, screw terminals

The Siemens SIRIUS 3RW4047-1BB05 soft starter is a compact and efficient solution for the gentle starting and stopping of three-phase asynchronous motors. It is designed to reduce mechanical stress on motors and connected loads by controlling the starting current and torque, ensuring smooth acceleration and deceleration.

This unit belongs to the SIRIUS 3RW40 series, which combines reliability, integrated protection, and ease of installation. The integrated bypass contact system automatically connects the motor directly to the supply line after the startup phase, minimizing power dissipation and internal heating during continuous operation.

The 3RW4047-1BB05 variant is a Size S3 device, rated for 106 A operational current and suitable for motor power up to 75 kW (at 400 V). It supports a supply voltage range of 400–600 V AC and a 24 V AC/DC control supply voltage, allowing flexible use in various control circuit configurations.

It features screw-type terminals for secure and conventional wiring connections and supports two-phase control, providing effective current limitation during motor startup. The soft starter includes built-in overload and motor protection capabilities, with an integrated bypass system for efficient operation and reduced power loss.

With its robust design, wide voltage range, and compact footprint, the 3RW4047-1BB05 is ideal for industrial applications such as pumps, compressors, conveyors, fans, and mixers where controlled motor startup and protection are required.