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Siemens 3RW4056-2BB35 SIRIUS Soft Starter - 145A

Siemens 3RW4056-2BB35 SIRIUS soft starter, 145 A.

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ManufacturerSiemens

Part number3RW4056-2BB35

Current Rating 145 A

Voltage 400-600 V AC

Motor Power 150 hp @ 575 V

Control Voltage 115 V AC

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Veteran-owned

CAGE: 9NK75

Controlled Motor Starting 145A Current Rating 400-600V AC Operation Up to 150hp Motor Support Spring-type Terminals

Product description

The Siemens SIRIUS soft starter (3RW4056-2BB35) is designed for smooth and controlled starting of three-phase motors. This unit is rated for 145 Amps and supports motors up to 150 hp at 575 V. It operates within a voltage range of 400-600 V AC and includes 115 V AC control voltage terminals with spring-type terminals for secure connections.

This soft starter is suitable for a wide range of industrial applications where controlled motor acceleration is necessary to reduce mechanical stress and electrical load. Industries that benefit from such starters include material handling, pumps, fans, and compressors, helping to extend equipment life and improve operational efficiency.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4056-2BB35. While this is a phased-out product, we can help you find the best available solutions. Source your automation components from Stanlo Automation for reliable support and quality parts.

Technical specifications

Current Rating	145 A
Voltage	400-600 V AC
Motor Power	150 hp @ 575 V
Control Voltage	115 V AC
Terminals	Spring-type

Common applications

Motor Control

Pump Systems

Fan Control

Conveyor Systems

Material Handling

Compatible systems

Compatible with three-phase AC motors requiring controlled start-up within its voltage and current ratings.

Also known as

SIRIUS Soft Starter Siemens Soft Starter 145A

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens 3RW5056-2AB15. Please consult product documentation for detailed transition information.

Technical note

Expert tip

When replacing the 3RW4056-2BB35, verify the mounting dimensions and electrical connections for the successor model 3RW5056-2AB15 to ensure compatibility.

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Frequently asked questions

What is the successor product for the Siemens 3RW4056-2BB35?

The preferred successor for the Siemens 3RW4056-2BB35 soft starter is the SIRIUS 3RW5 series, specifically the 3RW5056-2AB15 model, offering updated features and technology.