The Siemens 3RW5544-6HA14 is a high-performance SIRIUS 3RW55 Soft Starter designed for smooth and controlled starting and stopping of three-phase induction motors. It reduces mechanical stress, limits starting current, and improves motor lifespan in industrial applications. It is widely used in heavy-duty motor control systems such as pumps, compressors, conveyors, and HVAC systems.
• Siemens SIRIUS 3RW55 Series Soft Starter
• Part Number: 3RW5544-6HA14
• Rated motor voltage: 200–480 V AC
• Control supply voltage: 110–250 V AC
• Rated current: up to 250A
• Digital soft starter with advanced motor control
• Built-in overload protection
• Integrated bypass function for energy efficiency
• Smooth start & soft stop operation
• Reduced mechanical stress on motor
• Adjustable start/stop parameters
• High reliability for industrial duty cycles
• Compact modular design
• Suitable for continuous industrial operation
• IEC 60947-4-2 compliant
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RW55 |
| Part Number | 3RW5544-6HA14 |
| Product Type | Soft Starter |
| Supply Voltage | 200–480 V AC |
| Control Voltage | 110–250 V AC |
| Rated Current | 250 A |
| Motor Protection | Electronic overload protection |
| Starting Method | Voltage ramp control |
| Stop Function | Soft stop / pump stop |
| Cooling Method | Natural / forced (panel dependent) |
| Mounting Type | Panel mounting |
| Communication | Optional expansion modules (PROFINET/Modbus etc.) |
| Standard | IEC 60947-4-2 |
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