The Siemens 3RW4027-1BB14 is a SIRIUS 3RW40 Series Soft Starter designed for smooth starting and stopping of three-phase induction motors. It reduces high inrush current, minimizes mechanical stress on motors and connected equipment, and improves overall system reliability. Equipped with an integrated bypass contact system, this soft starter ensures low heat dissipation and enhanced energy efficiency during normal operation. It is suitable for pumps, fans, compressors, conveyor systems, and various industrial motor control applications.
• Siemens SIRIUS 3RW40 Series Soft Starter
• Part Number: 3RW4027-1BB14
• Rated operational current: 32A
• Motor rating: 15kW at 400V AC
• Three-phase motor soft starter
• Operating voltage: 200–480V AC
• Control voltage: 110–230V AC/DC
• Integrated bypass contact system
• Adjustable ramp-up and ramp-down functions
• Reduces motor starting current and mechanical stress
• Built-in motor overload protection functions
• Compact space-saving design
• DIN rail or panel mounting capability
• Screw terminal connections
• High operational reliability and long service life
• Suitable for pumps, fans, compressors, conveyors, and industrial machinery
• IP20 protection rating
• Complies with international industrial standards
| Parameter | Specification |
|---|---|
| Product Series | Siemens SIRIUS 3RW40 |
| Part Number | 3RW4027-1BB14 |
| Product Type | Soft Starter |
| Rated Operational Current | 32A |
| Motor Power Rating | 15kW @ 400V AC |
| Number of Phases | 3 Phase |
| Rated Operational Voltage | 200–480V AC |
| Control Supply Voltage | 110–230V AC/DC |
| Frequency | 50/60 Hz |
| Mounting Type | DIN Rail / Panel Mounting |
| Connection Type | Screw Terminal |
| Protection Rating | IP20 |
| Integrated Bypass | Yes |
| Ramp-Up Time | Adjustable (0–20 sec) |
| Ramp-Down Time | Adjustable (0–20 sec) |
| Operating Temperature | -25°C to +60°C |
| Width | 45 mm |
| Height | 154 mm |
| Depth | 125 mm |
| Application | Pumps, Fans, Compressors, Conveyors, Industrial Motor Control |
| Standard Compliance | CE, UL, CSA, CCC, EAC |
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