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Siemens SIRIUS 3RW4443-2BC36 Soft Starter - 180A, 150HP at 575V

Siemens SIRIUS Soft Starter 180A

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ManufacturerSiemens

Part number3RW4443-2BC36

Standard Rating (575V) 180A, 150 hp

Inside-Delta Rating (575V) 312A, 300 hp

Voltage 400-690V AC

Control Voltage 115V AC

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Controlled Motor Start-up Reduced Mechanical Stress Lower Inrush Current High-Efficiency Operation SIRIUS Design

Product description

The Siemens SIRIUS 3RW4443-2BC36 is a soft starter designed for motor control applications. It offers standard ratings of 180A and 150 hp at 575V (50°C), and inside-delta ratings of 312A and 300 hp at 575V. This unit operates on 400-690V AC power and features 115V AC spring-type terminals for control circuits.

This soft starter is suitable for a wide range of industrial motor applications where controlled start-up is required to reduce mechanical stress and electrical inrush current. Industries such as manufacturing, material handling, and pumping systems benefit from its smooth acceleration capabilities.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4443-2BC36. Secure this phased-out product while available, or inquire about its successor, the SIRIUS 3RW5, from our trusted inventory.

Technical specifications

Standard Rating (575V)	180A, 150 hp
Inside-Delta Rating (575V)	312A, 300 hp
Voltage	400-690V AC
Control Voltage	115V AC
Terminals	Spring-type

Common applications

Motor Control

Conveyor Systems

Pump Applications

Fan Control

Industrial Machinery

HVAC Systems

Also known as

Siemens SIRIUS 3RW44 Soft Motor Starter

Replaces / compatible with

Phased-out product. Successor is SIRIUS 3RW5, preferred successor type is 3RW5543-2HA16.

Technical note

Expert tip

This is a phased-out product. Ensure you have documentation for the successor model 3RW5543-2HA16 if replacing.

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Frequently asked questions

What are the key ratings for the Siemens 3RW4443-2BC36 soft starter at 575V?

The Siemens 3RW4443-2BC36 soft starter has a standard rating of 180A and 150 hp at 575V (50°C). In an inside-delta connection, it can handle 312A and 300 hp at 575V.