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Siemens SIRIUS Soft Starter 3RW4075-2BB44 - 356A, 200kW

Siemens SIRIUS soft starter, 356A, 200kW, for motor control.

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ManufacturerSiemens

Part number3RW4075-2BB44

Rated Operational Current 356 A

Motor Power 200 kW (400 V)

Supply Voltage 200-460 V AC

Control Voltage 230 V AC

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Smooth motor starting Reduced inrush current Motor protection functions Mechanical stress reduction Compact design

Product description

The Siemens SIRIUS soft starter 3RW4075-2BB44 is designed for smooth starting of three-phase motors. It has a rated operational current of 356 A and a power rating of 200 kW at 400 V. The unit operates with a supply voltage range of 200-460 V AC and features 230 V AC spring-type terminals for control power.

This soft starter is ideal for applications requiring controlled motor acceleration, reducing mechanical stress on machinery and electrical inrush current. It is commonly used in pumps, fans, compressors, and conveyors to ensure gentle start-ups.

Please note that this product (3RW4075-2BB44) is phased out. The preferred successor is the SIRIUS 3RW5075-2AB14. Stanlo Automation, a veteran-owned supplier of surplus industrial automation parts, can help you find suitable replacements or remaining stock.

Technical specifications

Rated Operational Current	356 A
Motor Power	200 kW (400 V)
Supply Voltage	200-460 V AC
Control Voltage	230 V AC
Terminals	Spring-type

Common applications

Pump control

Fan control

Conveyor systems

Compressor starting

General motor control

Also known as

Siemens SIRIUS 3RW40 SIVACON soft starter

Replaces / compatible with

Phased-out product. Successor is SIRIUS 3RW5, preferred type is 3RW5075-2AB14.

Technical note

Expert tip

Due to this being a phased-out product, ensure availability and consider the newer 3RW5 series for new installations or upgrades.

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Frequently asked questions

What is the successor to the Siemens 3RW4075-2BB44 soft starter?

The Siemens 3RW4075-2BB44 is a phased-out product. The preferred successor is the SIRIUS 3RW5 series, specifically the 3RW5075-2AB14 model.