Siemens SIRIUS Soft Starter 3RW4445 - 280A, 250HP
Siemens SIRIUS soft starter 3RW4445, rated 280A standard, 485A inside-delta.
The Siemens SIRIUS soft starter, part number 3RW4445-6BC36, is designed for smooth starting of three-phase motors. It operates within a voltage range of 400-690V AC. Under standard conditions at 50°C, it handles 280A and is rated for 250 hp. When configured for inside-delta connection, it can manage up to 485A and is rated for 500 hp. This model features screw terminals for connection. Please note that this product is phased out.
This soft starter is crucial for applications requiring controlled acceleration of motor loads, reducing mechanical stress and electrical inrush current. It's commonly used in industries such as material handling, pumps, fans, compressors, and other machinery where soft start functionality prevents system shock and prolongs equipment life.
Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens SIRIUS soft starter 3RW4445-6BC36. While this is a phased-out product, Stanlo can provide this component as a replacement or for specific inventory needs. We are dedicated to sourcing and supplying reliable industrial automation parts, ensuring you can maintain your existing systems.
| Standard Rating | 280 A, 250 hp (at 575V, 50°C) |
| Inside-Delta Rating | 485 A, 500 hp |
| Voltage | 400-690 V AC |
| Terminals | Screw |
| Status | Phased-out |