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Siemens SIRIUS 3RW4026-1TB04 S0 Soft Starter

Siemens SIRIUS S0 Soft Starter, 25A, 11kW/400V.

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ManufacturerSiemens

Part number3RW4026-1TB04

Size S0

Rated Current 25 A

Rated Power 11 kW at 400 V

Supply Voltage 200-480 V AC

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Veteran-owned

CAGE: 9NK75

Smooth motor start-up Reduced mechanical stress Integrated motor protection Adjustable start-up parameters Compact S0 size Screw terminal connections

Product description

The Siemens SIRIUS 3RW4026-1TB04 is an S0-sized soft starter designed to provide smooth and controlled acceleration for three-phase induction motors. It reduces mechanical stress on machinery and electrical stress on the power supply during motor start-up.

This soft starter is ideal for applications where smooth motor start-up is required to prevent jolts and surges, such as in conveyor systems, pumps, fans, and compressors. It offers adjustable starting parameters for optimal performance and motor protection through integrated thermistor motor protection.

Stanlo Automation, your veteran-owned source for surplus industrial automation parts, carries the Siemens SIRIUS 3RW4026-1TB04. Ensure reliable and efficient motor starting by sourcing your components from Stanlo.

Technical specifications

Size	S0
Rated Current	25 A
Rated Power	11 kW at 400 V
Supply Voltage	200-480 V AC
Coil Voltage	24 V AC/DC
Protection	Thermistor motor protection
Terminals	Screw

Common applications

Pump control

Fan control

Compressor control

Conveyor systems

Material handling

General motor starting

Compatible systems

Three-phase induction motors Industrial control panels Automation systems

Also known as

Siemens SIRIUS Motor Starter S0 Soft Starter 3RW40261TB04

Replaces / compatible with

This soft starter replaces direct-on-line starters to provide smoother motor acceleration and reduced electrical inrush current. It is compatible with motors requiring up to 11 kW at 400V.

Technical note

Expert tip

The integrated thermistor protection requires an external thermistor relay (e.g., 3RN1) for proper functionality. Ensure correct wiring of the control voltage and motor circuits.

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Frequently asked questions

What is the primary benefit of using the Siemens SIRIUS 3RW4026-1TB04 soft starter?

The primary benefit is providing a smooth, controlled start for AC motors, which reduces mechanical shock to the driven equipment and lowers electrical inrush current, extending the life of both the motor and the power system.