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Siemens SIRIUS 3RW4447-6BC44 Soft Starter - 432A

Siemens SIRIUS Soft Starter - 432A

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ManufacturerSiemens

Part number3RW4447-6BC44

Part Number 3RW4447-6BC44

Manufacturer Siemens

Series SIRIUS

Product Type Soft Starter

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Veteran-owned

CAGE: 9NK75

Soft motor starting and stopping Integrated bypass contact system Intrinsic device protection Motor overload protection Adjustable current limitation Phased-out product (successor available)

Product description

The Siemens 3RW4447-6BC44 is a SIRIUS soft starter designed for smooth motor acceleration and deceleration. It provides essential motor protection features and is built for demanding industrial applications. Key specifications include standard values at 400V/40°C of 432A and 250kW, and inside-delta values of 748A and 400kW. It operates on 200-460V AC control voltage and features screw terminals.

This soft starter is suitable for a wide range of motor control applications in manufacturing, material handling, and pumping systems where soft starting is critical to prevent mechanical stress and electrical surges. It helps extend motor and equipment lifespan.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4447-6BC44. We are committed to providing quality industrial automation components and reliable service. Please note this is a phased-out product; successors are available. Source your Siemens soft starters from Stanlo Automation.

Technical specifications

Part Number	3RW4447-6BC44
Manufacturer	Siemens
Series	SIRIUS
Product Type	Soft Starter
Standard Values (400V/40°C)	432A, 250kW
Inside-Delta Values (400V/40°C)	748A, 400kW
Control Voltage	200-460V AC
Terminals	Screw

Common applications

Motor Control

Pump Systems

Conveyor Belts

Fans

Manufacturing Equipment

HVAC Systems

Compatible systems

AC Induction Motors

Also known as

Siemens SIRIUS Soft Starter 3RW44 Soft Starter Motor Soft Starter

Replaces / compatible with

This product is phased out. The preferred successor is SIRIUS 3RW5547-6HA14.

Technical note

Expert tip

As a phased-out product, ensure availability of support and spare parts, or consider the recommended successor, the 3RW55 series.

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Frequently asked questions

What are the standard and inside-delta current ratings for the Siemens 3RW4447-6BC44 soft starter?

The Siemens 3RW4447-6BC44 soft starter has standard values of 432A at 400V/40°C, with an inside-delta circuit rating of 748A at 400V/40°C. Its corresponding power ratings are 250kW (standard) and 400kW (inside-delta).