The Siemens 3RW5546-6HA14 is a high-performance SIRIUS 3RW55 series soft starter designed for smooth and controlled starting and stopping of three-phase induction motors. It reduces mechanical stress, limits inrush current, and improves the lifespan of motors in demanding industrial applications.
This model is widely used in pumps, compressors, conveyors, HVAC systems, and heavy industrial motor drives, where controlled acceleration and deceleration are required for safe operation.
• Siemens SIRIUS 3RW55 Soft Starter Series
• Part Number: 3RW5546-6HA14
• Rated operational voltage: 200–480 V AC
• Control supply voltage: 110–250 V AC
• Rated current: approx. 370 A
• Integrated electronic motor protection
• Soft start & soft stop functionality
• Built-in bypass for energy efficiency after starting
• Adjustable ramp-up and ramp-down time
• Reduced mechanical and electrical stress on motor
• High reliability for heavy-duty industrial use
• Modular design for panel mounting
• Advanced fault detection and diagnostics
• IEC 60947-4-2 compliant
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RW55 |
| Part Number | 3RW5546-6HA14 |
| Product Type | Soft Starter |
| Rated Current | 370 A |
| Supply Voltage | 200–480 V AC |
| Control Voltage | 110–250 V AC |
| Motor Type | 3 Phase Induction Motor |
| Starting Method | Voltage ramp control |
| Stop Function | Soft stop / pump stop |
| Bypass Function | Integrated |
| Cooling | Panel / forced ventilation (application dependent) |
| Mounting Type | Panel mounting |
| Standard | IEC 60947-4-2 |
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