Siemens SIRIUS 3RW44 Soft Starter - Phased Out

The Siemens SIRIUS 3RW4443-6BC35 is a soft starter designed to provide controlled acceleration for three-phase induction motors. This unit is rated for 400-600 V AC and has a standard rating of 180 A at 575 V (150 hp) and an inside-delta rating of 312 A (300 hp) at 50°C ambient temperature. It features screw terminals for secure electrical connections. Please note that this product is phased out and has a designated successor.

This specific model, 3RW4443-6BC35, is no longer manufactured by Siemens. The preferred successor is the SIRIUS 3RW5 series, with the 3RW5543-6HA16 being the direct replacement. While this older model is unavailable new, Stanlo Automation may have refurbished or available stock. It was used in applications requiring reduced mechanical stress during motor start-up, such as conveyors, pumps, and fans, where smooth acceleration is critical.

Stanlo Automation, your trusted veteran-owned source for industrial automation parts, understands the challenges of sourcing obsolete components. While this Siemens 3RW4443-6BC35 is phased out, we can help you find its successor or compatible alternatives. Rely on us for your soft starter needs and ensure the longevity and efficiency of your motor control systems.