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Siemens SIRIUS 3RW4055-6BB44 Soft Starter - 134A, 75kW

Siemens SIRIUS 3RW4055-6BB44 soft starter - 134A, 75kW, phased-out.

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ManufacturerSiemens

Part number3RW4055-6BB44

Type Soft Starter

Series SIRIUS 3RW40

Rated Current 134 A (at 40°C)

Motor Power 75 kW (at 400V)

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Smooth Motor Acceleration Reduced Starting Current Mechanical Stress Reduction 75kW Motor Power Capacity 134A Rated Current Screw Terminals

Product description

The Siemens SIRIUS 3RW4055-6BB44 is a soft starter designed to provide smooth acceleration for three-phase motors. It has a rated current of 134A and supports motor ratings up to 75 kW at 400V and an ambient temperature of 40°C. The control voltage range is 200-460V AC, and it features screw terminals for connections. This model is a phased-out product.

It is important to note that the SIRIUS 3RW5 series is the successor to the 3RW40 series, with the preferred successor type for this particular unit being the 3RW5055-6AB14. Soft starters are crucial for reducing mechanical stress on machinery, controlling starting current, and optimizing energy consumption in applications involving pumps, fans, conveyors, and compressors.

Stanlo Automation, a veteran-owned surplus parts distributor, can supply the Siemens SIRIUS 3RW4055-6BB44 soft starter while available, and also offers guidance on suitable replacements from the newer SIRIUS 3RW5 series. We are committed to providing our customers with reliable industrial automation components.

Technical specifications

Type	Soft Starter
Series	SIRIUS 3RW40
Rated Current	134 A (at 40°C)
Motor Power	75 kW (at 400V)
Control Voltage	200-460 V AC
Terminals	Screw
Status	Phased-out

Common applications

Pump Control

Fan Control

Conveyor Systems

Compressor Control

Industrial Machinery

Motor Soft Start

Compatible systems

Three-phase AC Motors 400V Motor Systems

Also known as

Siemens SIRIUS Soft Starter 3RW4055 Siemens motor starter 134A

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RW5055-6AB14. Ensure compatibility when migrating to the new series.

Technical note

Expert tip

As this is a phased-out product, availability may be limited. Consider the successor 3RW5055-6AB14 for new installations or replacements to ensure long-term support.

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Frequently asked questions

What is the successor to the Siemens 3RW4055-6BB44 SIRIUS soft starter?

The Siemens 3RW4055-6BB44 is a phased-out product. The preferred successor is the SIRIUS 3RW5055-6AB14. It is recommended to consult Siemens documentation for a direct replacement and any necessary changes in wiring or setup.