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Siemens SIRIUS Soft Starter 3RW4446-6BC46 for High Motor Power

Siemens SIRIUS soft starter 3RW4446-6BC46, rated for 356A at 690V and 355kW.

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ManufacturerSiemens

Part number3RW4446-6BC46

Series SIRIUS

Rated Voltage 400-690 V AC

Control Voltage 230 V AC

Standard Current (690V, 40°C) 356 A

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Smooth Motor Starting Reduced Inrush Current Mechanical Stress Reduction Built-in Bypass Contacts Integrated Overload Protection Screw Terminal Connections

Product description

The Siemens SIRIUS soft starter, part number 3RW4446-6BC46, is designed for controlled starting of three-phase motors. Rated for 690 V and 40°C, it handles a standard current of 356 A and a motor power of 355 kW. Notably, this unit supports 'inside-delta' connections up to 600 V. It features screw terminals for secure connections. Please be aware that this is a phased-out product, with the preferred successor being the SIRIUS 3RW5546-6HA16.

This soft starter is essential for reducing mechanical stress on machinery and electrical network load during motor startup. Applications include pumps, fans, compressors, and conveyors where smooth acceleration is required.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4446-6BC46. Secure this component while available, or inquire about its successor for your motor control needs.

Technical specifications

Series	SIRIUS
Rated Voltage	400-690 V AC
Control Voltage	230 V AC
Standard Current (690V, 40°C)	356 A
Motor Power (690V)	355 kW
Inside-Delta Voltage	up to 600 V
Terminals	Screw
Protection	IP20

Common applications

Pump Control

Fan Control

Compressor Starting

Conveyor Systems

Industrial Machinery

Motor Load Management

Compatible systems

Three-phase AC induction motors Industrial control panels Motor control centers

Also known as

Siemens SIRIUS 3RW44 Soft Starter 3RW4446 Soft Starter Siemens Motor Starter 3RW4446-6BC46

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RW5546-6HA16. It is designed to provide controlled motor starting for high-power applications.

Technical note

Expert tip

Ensure the control voltage is correctly connected to the 230 V AC terminals for proper operation. Verify motor nameplate data against starter ratings.

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Frequently asked questions

What is the successor to the Siemens 3RW4446-6BC46 soft starter?

The Siemens 3RW4446-6BC46 is a phased-out product. The preferred successor is the SIRIUS 3RW5546-6HA16, which offers updated technology and features for motor starting applications.