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Siemens SIRIUS 3RW40 Soft Starter, 12.5A

Siemens SIRIUS 3RW40 soft starter, S0, 12.5A, 5.5kW.

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ManufacturerSiemens

Part number3RW4024-1BB04

Size S0

Rated Operational Current 12.5 A

Motor Power 5.5 kW (at 400V)

Control Voltage 200-480 V AC

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Veteran-owned

CAGE: 9NK75

Smooth motor acceleration Reduced inrush current S0 size Wide control voltage range 24V AC/DC control option Screw terminal connections

Product description

The Siemens SIRIUS 3RW4024-1BB04 is a compact soft starter with a size S0 rating, designed to reduce mechanical and electrical stress during motor startup. It features a 12.5 A current rating and is suitable for motors up to 5.5 kW at 400V. The control voltage range is 200-480V AC, with an auxiliary control voltage of 24V AC/DC. It is equipped with screw terminals for secure connections.

This soft starter is commonly used in applications requiring smooth acceleration of three-phase motors, such as pumps, fans, compressors, and conveyors. Its primary function is to prevent the high inrush currents and torque shocks associated with direct-on-line (DOL) starting, thereby extending the life of the motor and connected machinery.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4024-1BB04 soft starter. Sourcing this component from Stanlo ensures you receive a genuine Siemens part at a competitive price, supporting your industrial automation needs.

Technical specifications

Size	S0
Rated Operational Current	12.5 A
Motor Power	5.5 kW (at 400V)
Control Voltage	200-480 V AC
Auxiliary Control Voltage	24 V AC/DC
Terminals	Screw terminals
Ambient Temp	40 °C

Common applications

Pump control

Fan control

Compressor control

Conveyor systems

Machine tools

General motor starting

Compatible systems

Three-phase induction motors PLC control systems Standard motor control panels

Also known as

SIRIUS soft starter 12.5A Siemens 3RW40 S0 soft starter

Replaces / compatible with

This soft starter replaces the need for larger motor starters and can be used in place of direct-on-line starters for smoother motor operation. It is compatible with standard motor protection relays.

Technical note

Expert tip

When using the 24V AC/DC control voltage, ensure the correct polarity is observed for DC operation to prevent damage. Always adhere to wiring diagrams.

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Frequently asked questions

What is the maximum motor power for the Siemens 3RW4024-1BB04 at 400V?

The Siemens SIRIUS 3RW4024-1BB04 soft starter is rated for a maximum motor power of 5.5 kW at 400V. It has a rated operational current of 12.5 A.