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Siemens SIRIUS 3RW4456-6BC35 Soft Starter (Discontinued)

Siemens SIRIUS 3RW4456-6BC35 soft starter (discontinued).

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ManufacturerSiemens

Part number3RW4456-6BC35

Voltage 400-600 V AC

Standard Current (575V, 50C) 693 A

Inside-Delta Current 1200 A

Terminals Screw

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Smooth Motor Acceleration Reduced Mechanical Stress Reduced Electrical Stress High Current Ratings Screw Terminals

Product description

The Siemens SIRIUS 3RW4456-6BC35 is a soft starter designed for controlled motor acceleration. This unit supports a voltage range of 400-600V AC and features impressive current ratings: 693A at 575V, 50°C (standard) and 1200A (inside-delta). It utilizes screw terminals for secure connections. Please note that this product is phased out.

Soft starters like this are crucial for reducing mechanical stress on machinery and electrical stress on the power supply during motor startup. They are commonly used in applications involving pumps, fans, compressors, and conveyors where smooth acceleration is required.

Stanlo Automation, a veteran-owned surplus parts distributor, has this Siemens SIRIUS 3RW4456-6BC35 available. While it is a discontinued product, we can help you source this specific part or guide you towards its preferred successor, the 3RW5554-6HA16, ensuring your automation needs are met.

Technical specifications

Voltage	400-600 V AC
Standard Current (575V, 50C)	693 A
Inside-Delta Current	1200 A
Terminals	Screw
Status	Phased-out
Successor	3RW5554-6HA16

Common applications

Pump Control

Fan Control

Compressor Starting

Conveyor Systems

Industrial Machinery

Compatible systems

Industrial Motor Control Systems (400-600V AC)

Also known as

Siemens SIRIUS Soft Starter 3RW44 Soft Starter

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RW5554-6HA16. It replaces basic direct-on-line motor starting methods where soft-start functionality is needed.

Technical note

Expert tip

When replacing this phased-out unit, ensure the successor 3RW5554-6HA16 meets all the original 3RW4456-6BC35's electrical and operational requirements for your specific application.

What happens next?

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Frequently asked questions

What is the successor to the Siemens 3RW4456-6BC35 soft starter?

The Siemens 3RW4456-6BC35 soft starter has been phased out. Its preferred successor is the Siemens SIRIUS 3RW5554-6HA16. This newer model offers updated features and technology for soft-start applications.