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Siemens SIRIUS Soft Starter 3RW4038-2BB04 - 72A, 37kW

Siemens SIRIUS S2 soft starter for 37kW motors, 72A rated.

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ManufacturerSiemens

Part number3RW4038-2BB04

Series SIRIUS 3RW40

Class S2

Rated Current 72 A

Motor Power 37 kW (at 400 V)

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Smooth motor starting Reduced current peaks S2 overload protection Wide control voltage range Spring-type terminals for easy connection Suitable for 37kW motors

Product description

The Siemens SIRIUS soft starter (3RW4038-2BB04) is engineered for smooth and controlled starting of three-phase asynchronous motors. This S2 class soft starter has a rated current of 72 A and is suitable for motor ratings up to 37 kW at 400 V. It features a wide control voltage range of 200-480 V AC and a separate control supply of 24 V AC/DC, ensuring flexibility in power integration.

Designed for reliable performance in industrial environments, this soft starter mitigates mechanical stress on machinery and reduces current peaks during motor start-up. The spring-type terminals facilitate quick and secure connections, simplifying installation and maintenance. It is ideal for applications such as pumps, fans, compressors, and conveyor systems where a gradual start is beneficial.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens SIRIUS soft starter 3RW4038-2BB04. Optimize your motor control with reliable and competitively priced surplus components. Trust Stanlo Automation for your industrial automation needs, ensuring efficient and dependable operation.

Technical specifications

Series	SIRIUS 3RW40
Class	S2
Rated Current	72 A
Motor Power	37 kW (at 400 V)
Control Voltage	200-480 V AC
Control Supply	24 V AC/DC
Terminals	Spring-type
Manufacturer	Siemens

Common applications

Pump control

Fan control

Conveyor systems

Compressor starting

Machine tools

General motor starting

Compatible systems

Three-phase asynchronous motors

Also known as

Siemens SIRIUS 3RW40 Soft Starter 3RW4038 Soft Starter Siemens Motor Starter

Replaces / compatible with

This soft starter replaces direct-on-line (DOL) starters for smoother motor acceleration. It is compatible with standard three-phase induction motors.

Technical note

Expert tip

For optimal performance and longevity, ensure the ambient temperature is within the operating range specified by Siemens and that adequate cooling is provided.

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Frequently asked questions

What is the maximum motor power that the Siemens 3RW4038-2BB04 soft starter can handle?

The Siemens SIRIUS soft starter 3RW4038-2BB04 is rated for motor power up to 37 kW at 400 V. It also has a rated current of 72 A, providing robust starting control for such motors.