Siemens SIRIUS 3RW40 Soft Starter - 248A, 250 HP @ 575V
Siemens SIRIUS 3RW40 soft starter, 248A, for motor control.
The Siemens SIRIUS 3RW40 soft starter (3RW4074-6BB35) is designed for smooth starting of three-phase induction motors. It offers a rated operational current of 248 A at 50°C and is suitable for motors up to 250 hp at 575 V. The device operates with a main circuit voltage range of 400-600 V AC and a control circuit voltage of 115 V AC. It features screw terminals for secure connections.
This soft starter is ideal for applications where high starting torque is required but mechanical stress on the motor and connected equipment needs to be minimized. It's commonly used in pump, fan, compressor, and conveyor applications. Proper soft starting reduces mechanical wear and electrical inrush current.
While this product is phased out, Stanlo Automation can assist in finding suitable replacements or alternative solutions. As a veteran-owned distributor of surplus industrial parts, we understand the importance of continuity in your operations. Contact us for your Siemens component needs.
| Rated Operational Current | 248 A (at 50 °C) |
| Motor Power | 250 hp / 575 V |
| Control Voltage | 115 V AC |
| Main Circuit Voltage | 400-600 V AC |
| Terminals | Screw |
| Product Status | Phased-out |