The Siemens 3RW5543-6HA14 is a high-performance SIRIUS 3RW55 Soft Starter designed for smooth starting and stopping of three-phase induction motors. Rated for 210A and operating voltages from 200V to 480V AC, this advanced digital soft starter minimizes mechanical stress, reduces inrush current, and prevents voltage drops during motor startup. Featuring integrated bypass contacts, motor overload protection, pump control functions, torque control, and extensive communication capabilities, it is ideal for pumps, compressors, fans, conveyors, crushers, and other industrial motor applications. Its compact design, intelligent diagnostics, and high operational reliability make it suitable for demanding industrial and infrastructure projects.
• Siemens SIRIUS 3RW55 Soft Starter Series
• Part Number: 3RW5543-6HA14
• Rated operational current: 210A
• Operating voltage range: 200–480V AC
• Control supply voltage: 110–250V AC
• Three-phase motor soft starter
• Integrated bypass contact system
• Adjustable soft start and soft stop functions
• Built-in motor overload protection
• Current limiting and torque control functions
• Pump control and pump stop functionality
• DC braking capability
• Motor heating function
• Breakaway pulse function
• Advanced diagnostics and monitoring features
• Supports PROFINET, PROFIBUS, Modbus TCP, Modbus RTU and EtherNet/IP communication modules
• HMI High Feature support with removable display module
• Compact and robust industrial design
• Suitable for pumps, compressors, fans, blowers and conveyors
• Complies with IEC 60947-4-2 standards
• Long service life with reduced mechanical wear on motors and equipment
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RW55 |
| Part Number | 3RW5543-6HA14 |
| Product Type | Soft Starter |
| Rated Current | 210A |
| Rated Operational Voltage (Ue) | 200–480V AC |
| Control Supply Voltage (Us) | 110–250V AC |
| Number of Phases | 3 Phase |
| Power Rating | Up to 55kW |
| Start Voltage Adjustment | 20–100% |
| Start Ramp Time | 0–360 s |
| Stop Ramp Time | 0–360 s |
| Current Limitation | 125–800% Adjustable |
| Torque Limitation | 20–200% Adjustable |
| Integrated Bypass | Yes |
| Overload Protection | Built-In |
| Communication Support | PROFINET, PROFIBUS, Modbus TCP, Modbus RTU, EtherNet/IP |
| Protection Class | IP00 |
| Rated Insulation Voltage | 480V |
| Rated Impulse Voltage | 6kV |
| Mounting Type | Panel Mount |
| Terminal Type | Screw Terminals |
| Width | 210 mm |
| Height | 393 mm |
| Depth | 203 mm |
| Standard Compliance | IEC 60947-4-2 |
| Application | Pumps, Fans, Compressors, Conveyors, Blowers, Crushers, Industrial Motors |
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