Siemens SIRIUS 3RW4444-6BC34 Soft Starter (Phased-Out)
Siemens SIRIUS soft starter, 215A (460V), phased-out.
The Siemens 3RW4444-6BC34 is a SIRIUS soft starter designed for controlled motor starting. At 460V and 50°C ambient temperature, it has a standard rating of 215A and can handle 150 hp. In an inside-delta configuration, it supports up to 372A and 300 hp. This unit operates on 200-460V AC and is controlled by 115V AC, featuring screw terminals.
This soft starter is suitable for applications requiring smooth acceleration of three-phase motors, reducing mechanical stress and electrical inrush current. It's commonly used in pump applications, fan systems, and conveyor belts where soft start functionality is beneficial.
Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4444-6BC34. As this is a phased-out product, we provide a valuable source for replacement or spare parts. The preferred successor is the SIRIUS 3RW5544-6HA14.
| Part Number | 3RW4444-6BC34 |
| Manufacturer | Siemens |
| Series | SIRIUS |
| Type | Soft Starter |
| Standard Rating (460V, 50°C) | 215 A, 150 hp |
| Inside-Delta Rating | 372 A, 300 hp |
| Voltage | 200-460 V AC |
| Control Voltage | 115 V AC |
| Terminals | Screw |