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Siemens 3RW4447-6BC46 SIRIUS Soft Starter — 432A, 400kW

Siemens 3RW4447-6BC46 SIRIUS Soft Starter

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ManufacturerSiemens

Part number3RW4447-6BC46

Type Soft Starter

Series SIRIUS 3RW44

Voltage 400-690V AC

Current 432A (Standard, 40°C)

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Smooth motor start Reduced inrush current Mechanical stress reduction Overload protection Integrated bypass contactor Screw terminals

Product description

The Siemens 3RW4447-6BC46 is a high-performance SIRIUS soft starter designed for smooth and controlled acceleration of three-phase asynchronous motors. It operates at values up to 690V and 40°C, with a standard rating of 432A and 400kW. This unit is suitable for inside-delta applications up to 600V and features screw terminals for reliable connections.

This soft starter is crucial for applications requiring reduced mechanical stress on machinery, minimized inrush current, and extended equipment lifespan. It finds extensive use in heavy industry, pumping stations, conveyor systems, and other demanding motor control scenarios.

Stanlo Automation, a veteran-owned surplus distributor, offers this Siemens 3RW4447-6BC46 soft starter. We provide a reliable source for high-quality industrial automation components, ensuring your operations continue smoothly with cost-effective solutions.

Technical specifications

Type	Soft Starter
Series	SIRIUS 3RW44
Voltage	400-690V AC
Current	432A (Standard, 40°C)
Power	400kW (Standard, 40°C)
Control Voltage	230V AC
Terminals	Screw
Phase	3-Phase

Common applications

Pumps

Fans

Compressors

Conveyor belts

Crushers

Extruders

Industrial machinery

Compatible systems

Suitable for direct connection to 3-phase asynchronous motors within the specified voltage and current ratings.

Also known as

Siemens SIRIUS 3RW4447 3RW44 Soft Starter Siemens Motor Starter

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RW5547-6HA16. It replaces older direct-on-line starters by providing controlled acceleration.

Technical note

Expert tip

Note that this unit is phased out; ensure availability of spares or consider the recommended successor for long-term projects.

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Frequently asked questions

What is the maximum power rating for the Siemens 3RW4447-6BC46 soft starter at 690V?

At 690V and a standard ambient temperature of 40°C, the Siemens 3RW4447-6BC46 soft starter has a maximum power rating of 400 kW. It can handle up to 432A under these conditions.