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Siemens 3RW4055-2BB44 SIRIUS Soft Starter S6

Siemens 3RW4055-2BB44 SIRIUS S6 soft starter (134A, 75kW).

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ManufacturerSiemens

Part number3RW4055-2BB44

Type SIRIUS S6 Soft Starter

Current 134 A

Power 75 kW @ 400 V

Input Voltage 200-460 V AC

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SIRIUS S6 series 134A rated current 75kW motor power 200-460V AC input Smooth motor acceleration Spring-type terminals

Product description

The Siemens 3RW4055-2BB44 is a SIRIUS S6 soft starter with a rated current of 134 A and a power rating of 75 kW at 400 V. It operates with an input voltage range of 200-460 V AC and features spring-type terminals for connections. This product is noted as phased-out, with the SIRIUS 3RW5 series being its successor, specifically the 3RW5055-2AB14 as the preferred replacement.

This soft starter is designed to provide smooth acceleration for three-phase induction motors, reducing mechanical stress on machinery and electrical stress on the power supply. It is commonly used in applications such as pump controls, fan systems, and conveyor belts where soft starting is beneficial.

Stanlo Automation, your trusted veteran-owned surplus parts distributor, offers the Siemens 3RW4055-2BB44 SIRIUS soft starter. We provide access to essential industrial components, including discontinued items, to support your maintenance and upgrade needs.

Technical specifications

Type	SIRIUS S6 Soft Starter
Current	134 A
Power	75 kW @ 400 V
Input Voltage	200-460 V AC
Terminals	Spring-type
Status	Phased-out

Common applications

Motor control

Pump systems

Fan controls

Conveyor belts

Industrial machinery

Machine starting

Compatible systems

Three-phase induction motors

Also known as

SIRIUS 3RW40 soft starter Siemens S6 soft starter

Replaces / compatible with

This product is phased out and has been succeeded by the SIRIUS 3RW5 series. The preferred replacement is the Siemens 3RW5055-2AB14.

Technical note

Expert tip

While this unit is phased out, ensure compatibility with control circuits and auxiliary components if replacing an existing unit.

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Frequently asked questions

What is the successor to the Siemens 3RW4055-2BB44 SIRIUS soft starter?

The Siemens 3RW4055-2BB44 is a phased-out product. Its successor is the SIRIUS 3RW5 series, with the 3RW5055-2AB14 being the specifically recommended preferred successor type.