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Siemens 3RW4446-6BC45 SIRIUS Soft Starter

Siemens 3RW4446-6BC45 SIRIUS soft starter.

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ManufacturerSiemens

Part number3RW4446-6BC45

Voltage 400-600 V AC

Standard Current 356 A

Inside-Delta Current 617 A

Standard Power 250 kW

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Veteran-owned

CAGE: 9NK75

Integrated bypass Intelligent monitoring functions Torque control Compact construction Screw terminals Phased-out product

Product description

The Siemens 3RW4446-6BC45 is a SIRIUS soft starter designed for high-feature applications, enabling controlled starting and stopping of three-phase asynchronous motors. It operates within a voltage range of 400-600V AC, with standard ratings of 356A and 250kW, and inside-delta ratings of 617A and 450kW. This model features screw terminals and includes an integrated bypass for compact construction and reduced heat dissipation.

This soft starter is ideal for reducing current peaks, minimizing supply voltage fluctuations, and decreasing mechanical load on drives. It is particularly suited for high motor outputs and inside-delta circuits, offering an innovative torque control for ideal motor startup. Applications span various industries, including manufacturing, material handling, and pump control.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4446-6BC45. We ensure quality components and reliable service for your automation needs.

Technical specifications

Voltage	400-600 V AC
Standard Current	356 A
Inside-Delta Current	617 A
Standard Power	250 kW
Inside-Delta Power	450 kW
Coil Voltage	230 V AC
Terminals	Screw

Common applications

Motor starting

Motor stopping

Industrial machinery

Pump control

Conveyor systems

Material handling

Also known as

3RW4446-6BC45 SIEMENS

Replaces / compatible with

This product is phased out. The preferred successor is SIRIUS 3RW5546-6HA16.

Technical note

Expert tip

As this is a phased-out product, ensure availability of compatible spare parts or consider the recommended successor (3RW5546-6HA16) for new installations.

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Frequently asked questions

What are the key specifications for the Siemens 3RW4446-6BC45?

The Siemens 3RW4446-6BC45 soft starter operates at 400-600V AC. Its standard ratings are 356A and 250kW, while its inside-delta ratings are 617A and 450kW. It uses screw terminals and has a 230V AC coil.