Siemens SIRIUS 3RW4445-6BC34 Soft Starter - 280A
Siemens SIRIUS 3RW4445-6BC34 soft starter, 280A (460V). Phased-out.
The Siemens 3RW4445-6BC34 is a SIRIUS soft starter designed for smooth and controlled starting of electric motors. At 460V and 50°C, it provides standard ratings of 280A and 400HP, with inside-delta ratings of 485A and 400HP. It operates on 200-460V AC power with a 115V AC control voltage and features screw terminals. Please note that this is a phased-out product.
Soft starters like this are crucial in industrial applications to reduce mechanical stress on machinery and electrical stress on the power supply during motor start-up. They are used in pumps, fans, conveyors, and other motor-driven equipment to prevent high inrush currents and torque shocks.
Stanlo Automation, a veteran-owned supplier of surplus industrial parts, offers the Siemens 3RW4445-6BC34. While phased out, we may have available stock. We recommend considering the preferred successor, the 3RW5545-6HA14, for new installations.
| Rated Current (Standard) | 280A (at 460V, 50°C) |
| Rated Power (Standard) | 200 HP |
| Rated Current (Inside-delta) | 485A |
| Rated Power (Inside-delta) | 400 HP |
| Control Voltage | 115V AC |
| Main Voltage | 200-460V AC |
| Terminals | Screw |