Siemens SIRIUS S0 Soft Starter 25A 11kW 3RW3026-1BB14

The Siemens SIRIUS S0 Soft Starter (3RW3026-1BB14) is a compact and reliable motor starting solution designed for three-phase induction motors. With a rated operational current of 25 A and a motor power rating of 11 kW at 400 V, this soft starter provides smooth voltage ramp starting and stopping, reducing mechanical stress and electrical surges. It features an integrated bypass for energy efficiency and is suitable for DIN rail or screw mounting. The device operates with a control supply voltage of 24 V AC/DC and is rated for 200-480 V AC. Ideal for applications requiring gentle acceleration and deceleration, such as pumps, fans, and conveyors.

Advantages

• Smooth voltage ramp start and stop reduces mechanical wear and electrical disturbances.
• Integrated bypass saves energy and reduces heat dissipation during full-speed operation.
• Compact S0 frame size saves space in control cabinets.
• Wide operating temperature range (-25 to +60 °C) ensures reliability in harsh environments.
• Simple screw terminal connections for easy installation.

Suitable for

• Pumps and compressors
• Fans and blowers
• Conveyors and material handling
• Machine tools and industrial machinery

Key specifications

• Product Type: Soft Starter
• Series: SIRIUS 3RW30
• Frame Size: S0
• Rated Operational Current (Ie): 25 A at 40°C
• Rated Operational Voltage (Ue): 200-480 V AC
• Control Supply Voltage (Us): 24 V AC/DC
• Motor Power at 400 V: 11 kW
• Motor Power at 230 V: 5.5 kW
• Number of Phases: 3-phase
• Starting Method: Voltage ramp
• Integrated Bypass: Yes
• Adjustable Ramp-up Time: 0-20 s
• Adjustable Ramp-down Time: 0-20 s
• Operating Frequency: 50/60 Hz
• Connection Type: Screw terminals
• Mounting Type: DIN rail / Screw mounting
• Protection Class (IP): IP20
• Ambient Operating Temperature: -25 to +60 °C

Recommendations

For optimal performance, use with a separate overload protection device and short-circuit protection as the soft starter does not include these functions. Ensure proper heat dissipation and follow the manufacturer's installation guidelines.