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SIRIUS soft starter

SIRIUS soft starters from Siemens are electronic motor control devices designed to smoothly ramp up the voltage and current supplied to three-phase induction motors during startup. These solid-state starters, also known as soft start controllers or reduced voltage starters, continuously monitor the electrical supply to the motor, adapting the st...

SIRIUS soft starters from Siemens are electronic motor control devices designed to smoothly ramp up the voltage and current supplied to three-phase induction motors during startup. These solid-state starters, also known as soft start controllers or reduced voltage starters, continuously monitor the electrical supply to the motor, adapting the starting characteristics to the specific load of the driven machine. The SIRIUS series offers a wide range of models with varying rated operational currents, from 3.6 A up to 17.6 A, and corresponding motor power ratings from 1.5 kW to 7.5 kW at 400 V AC. They are available with screw-type or spring-type terminals and support control supply voltages of 24 V AC/DC or 110-230 V AC/DC, operating on a main supply of 200-480 V AC. These devices provide a very smooth engine start with relatively low mechanical stress, extending the life of both the motor and the driven equipment.

These soft starters are primarily used in industrial automation and machine building applications where controlled acceleration is critical. Typical sectors include material handling (conveyors, elevators), pumping systems, fans, compressors, and other centrifugal machinery. They are installed in motor control centers (MCCs), distribution panels, and direct-on-machine enclosures. The SIRIUS S00 frame size is particularly suited for compact installations, offering a space-saving solution for controlling small to medium power motors in environments requiring precise torque control and reduced inrush current.

The SIRIUS 3RW30 series soft starters comply with international standards such as IEC 60947-4-2 for motor starters and soft starters. They are fully compatible with the Siemens SIRIUS system landscape, integrating seamlessly with other components like contactors, overload relays, and communication modules via the SIRIUS bus system. While designed for Siemens ecosystems, their electrical characteristics make them suitable for use in any standard industrial control panel adhering to IEC or UL norms.

At Electric Automation Network, we provide a comprehensive range of Siemens SIRIUS soft starters with real-time pricing and detailed technical documentation for each article. Our team of specialized engineers offers personalized technical support to help you select the correct model based on your motor's rated current, voltage, and control requirements. We ensure express worldwide shipping, so you can get the right soft starter for your application delivered quickly, minimizing downtime and keeping your production lines running.

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Manufacturer Code Reference Catalog Number Description Delivery Price

3RW4024-1BB15

3RW4024-1BB15

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SIRIUS soft starter S0 12.5 A, 7.5 kW/500 V, 40 °C 400-600 V AC, 110-230 V AC/DC Screw terminals

SIRIUS Electronic starter, soft start and stop, S0 motor protection 400-600 V AC/500V, 40ºC, CLASS10: 12.5A, 7.5KW; Vm:110-230V AC/DC, screw connection.

 		3 View Availability View Price

3RW4024-2BB05

3RW4024-2BB05

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SIRIUS soft starter S0 12.5 A, 7.5 kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC spring-type terminals

SIRIUS Electronic starter, soft start and stop, S0 motor protection 400-600 V AC/500V, 40ºC, CLASS10: 12.5A, 7.5KW; Vm:24V AC/DC, spring connection.

 		3 View Availability View Price

3RW4024-2BB14

3RW4024-2BB14

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SIRIUS soft starter S0 12.5 A, 5.5 kW/400 V, 40 °C 200-480 V AC, 110-230 V AC/DC spring-type terminals

SIRIUS Electronic starter, soft start and stop, S0 motor protection 200-480 V AC/400V, 40ºC, CLASS10: 12.5A, 5.5KW; Vm:110-230V AC/DC, spring connection.

 		3 View Availability View Price

3RW4024-2BB15

3RW4024-2BB15

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SIRIUS soft starter S0 12.5 A, 7.5 kW/500 V, 40 °C 400-600 V AC, 110-230 V AC/DC spring-type terminals

SIRIUS Electronic starter,soft start and stop,motor protection S0 400-600 V AC/500V, 40ºC, CLASS10 : 12.5A, 7.5KW ; VM:110-230V AC/DC, spring connection. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

3RW4024-2TB04

3RW4024-2TB04

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SIRIUS soft starter S0 12.5 A, 5.5 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC spring-type terminals Thermistor motor protection

SIRIUS Electronic starter, soft start and stop, S0 motor protection 200-480 V AC/400V, 40ºC, CLASS10: 12.5A, 5.5KW; Vm:24V AC/DC, spring connection, thermistor protection.

 		3 View Availability View Price

3RW4026-1BB04

3RW4026-1BB04

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SIRIUS soft starter S0 25 A, 11 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC Screw terminals

SIRIUS Electronic starter, soft start and stop, S0 motor protection 200-480 V AC/400V, 40ºC, CLASS10: 25A, 11KW; Vm:24V AC/DC, screw connection.

 		3 View Availability View Price

3RW4026-1BB05

3RW4026-1BB05

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SIRIUS soft starter S0 25 A, 15 kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC Screw terminals

SIRIUS Electronic starter, soft start and stop, S0 motor protection 400-600 V AC/500V, 40ºC, CLASS10: 25A, 15KW; Vm:24V AC/DC, screw connection.

 		3 View Availability View Price

3RW4024-2TB05

3RW4024-2TB05

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SIRIUS soft starter S0 12.5 A, 7.5 kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC spring-type terminals Thermistor motor protection

SIRIUS Electronic starter,soft start and stop,motor protection S0 400-600 V AC/500V, 40ºC, CLASS10 : 12.5A, 7.5KW ; Vm: 24 V AC / DC, spring connection, thermistor protection. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

3RW4026-1BB14

3RW4026-1BB14

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SIRIUS soft starter S0 25 A, 11 kW/400 V, 40 °C 200-480 V AC, 110-230 V AC/DC Screw terminals

SIRIUS Electronic starter, soft start and stop, S0 motor protection 200-480 V AC/400V, 40ºC, CLASS10: 25A, 11KW; Vm:110-230V AC/DC, screw connection.

 		3 View Availability View Price

3RW4026-1BB15

3RW4026-1BB15

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SIRIUS soft starter S0 25 A, 15 kW/500 V, 40 °C 400-600 V AC, 110-230 V AC/DC Screw terminals

SIRIUS Electronic starter, soft start and stop, S0 motor protection 400-600 V AC/500V, 40ºC, CLASS10: 25A, 15KW; Vm:110-230V AC/DC, screw connection.

 		3 View Availability View Price

3RW4026-1TB04

3RW4026-1TB04

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SIRIUS soft starter S0 25 A, 11 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC Screw terminals Thermistor motor protection

SIRIUS Electronic starter, soft start and stop, S0 motor protection 200-480 V AC/400V, 40ºC, CLASS10: 25A, 11KW; Vm:24V AC/DC, screw connection, thermistor protection.

 		3 View Availability View Price

3RW4026-1TB05

3RW4026-1TB05

-

SIRIUS soft starter S0 25 A, 15 kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC Screw terminals Thermistor motor protection

SIRIUS Electronic starter, soft start and stop, S0 motor protection 400-600 V AC/500V, 40ºC, CLASS10: 25A, 15KW; Vm:24 V AC/DC, screw connection, thermistor protection.

 		3 View Availability View Price

3RW4026-2BB04

3RW4026-2BB04

-

SIRIUS soft starter S0 25 A, 11 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC spring-type terminals

 		3 View Availability View Price

3RW4026-2BB14

3RW4026-2BB14

-

SIRIUS soft starter S0 25 A, 11 kW/400 V, 40 °C 200-480 V AC, 110-230 V AC/DC spring-type terminals

 		3 View Availability View Price

3RW4026-2BB15

3RW4026-2BB15

-

SIRIUS soft starter S0 25 A, 15 kW/500 V, 40 °C 400-600 V AC, 110-230 V AC/DC spring-type terminals

SIRIUS Electronic starter,smooth start and stop,motor protection S0 400-600 V AC/500V, 40ºC, CLASS10 : 25A, 15KW ; VM:110-230V AC/DC, spring connection. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

3RW4026-2TB04

3RW4026-2TB04

-

SIRIUS soft starter S0 25 A, 11 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC spring-type terminals Thermistor motor protection

 		3 View Availability View Price

3RW4026-2TB05

3RW4026-2TB05

-

SIRIUS soft starter S0 25 A, 15 kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC spring-type terminals Thermistor motor protection

SIRIUS Electronic starter,smooth start and stop,motor protection S0 400-600 V AC/500V, 40ºC, CLASS10 : 25A, 15KW ; Vm: 24 V AC / DC, spring connection, thermistor protection. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

3RW4026-2BB05

3RW4026-2BB05

-

SIRIUS soft starter S0 25 A, 15 kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC spring-type terminals

SIRIUS Electronic starter,smooth start and stop,motor protection S0 400-600 V AC/500V, 40ºC, CLASS10 : 25A, 15KW ; Vm:24V AC/DC, spring connection. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

3RW4027-1BB05

3RW4027-1BB05

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SIRIUS soft starter S0 32 A, 18.5 k kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC Screw terminals

 		3 View Availability View Price

3RW4027-1BB04

3RW4027-1BB04

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SIRIUS soft starter S0 32 A, 15 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC Screw terminals

 		3 View Availability View Price

3RW4027-1BB14

3RW4027-1BB14

-

SIRIUS soft starter S0 32 A, 15 kW/400 V, 40 °C 200-480 V AC, 110-230 V AC/DC Screw terminals

 		3 View Availability View Price

3RW4027-1TB04

3RW4027-1TB04

-

SIRIUS soft starter S0 32 A, 15 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC Screw terminals Thermistor motor protection

 		3 View Availability View Price

3RW4027-2BB04

3RW4027-2BB04

-

SIRIUS soft starter S0 32 A, 15 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC spring-type terminals

 		3 View Availability View Price

3RW4027-1BB15

3RW4027-1BB15

-

SIRIUS soft starter S0 32 A, 18.5 k kW/500 V, 40 °C 400-600 V AC, 110-230 V AC/DC Screw terminals

 		3 View Availability View Price

3RW4027-1TB05

3RW4027-1TB05

-

SIRIUS soft starter S0 32 A, 18.5 k kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC Screw terminals Thermistor motor protection

 		3 View Availability View Price

3RW4027-2BB05

3RW4027-2BB05

-

SIRIUS soft starter S0 32 A, 18.5 k kW/500 V, 40 °C 400-600 V AC, 24 V AC/DC spring-type terminals

SIRIUS Electronic starter,smooth start and stop,motor protection S0 400-600 V AC/500V, 40ºC, CLASS10 : 32A, 18.5KW ; Vm:24V AC/DC, spring connection. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

3RW4027-2BB15

3RW4027-2BB15

-

SIRIUS soft starter S0 32 A, 18.5 k kW/500 V, 40 °C 400-600 V AC, 110-230 V AC/DC spring-type terminals

SIRIUS Electronic starter,soft start and stop,motor protection S0 400-600 V AC/500V, 40ºC, CLASS10 : 32A, 18.5KW ; Vm:110-230V AC/DC,spring connection. Manufactured to order. Non-Cancelable Non-Returnable.

 		3 View Availability View Price

3RW4027-2BB14

3RW4027-2BB14

-

SIRIUS soft starter S0 32 A, 15 kW/400 V, 40 °C 200-480 V AC, 110-230 V AC/DC spring-type terminals

SIRIUS Electronic starter,soft start and stop,motor protection S0 200-480 V AC/400V, 40ºC, CLASS10 : 32A, 15KW ; Vm:110-230V AC/DC,spring connection

 		3 View Availability View Price

3RW4027-2TB04

3RW4027-2TB04

-

SIRIUS soft starter S0 32 A, 15 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC spring-type terminals Thermistor motor protection

SIRIUS Electronic starter,soft start and stop,motor protection S0 200-480 V AC/400V, 40ºC, CLASS10 : 32A, 15KW ; Vm:24V AC/DC ,spring connection, thermistor protection

 		3 View Availability View Price

3RW4028-1BB04

3RW4028-1BB04

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SIRIUS soft starter S0 38 A, 18.5 kW/400 V, 40 °C 200-480 V AC, 24 V AC/DC Screw terminals

SIRIUS Electronic starter,soft start and stop,motor protection S0 200-480 V AC/400V, 40ºC, CLASS10 : 38A, 18.5KW ; Vm:24V AC/DC,screw connection

 		3 View Availability View Price

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