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Siemens 3RW3028-2BB04 SIRIUS Soft Starter

Siemens SIRIUS Soft Starter S0, 38A

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ManufacturerSiemens

Part number3RW3028-2BB04

Size S0

Rated Current 38A

Motor Power 18.5 kW @ 400V

Supply Voltage 200-480V AC

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Smooth motor start Reduces mechanical stress S0 size 38A continuous current 24V AC/DC control Spring-type terminals

Product description

The Siemens 3RW3028-2BB04 is a SIRIUS soft starter in size S0, designed for smooth motor startup. It has a rated operational current of 38A and supports motor ratings up to 18.5 kW at 400V. The control voltage range is 200-480V AC, with a 24V AC/DC control input, and features spring-type terminals for easy connection.

This soft starter is ideal for reducing mechanical stress on machinery and electrical load during motor start-up. It is widely used in conveyor systems, pumps, fans, and other industrial machinery where controlled acceleration is required.

Stanlo Automation, your veteran-owned source for surplus industrial parts, provides the Siemens 3RW3028-2BB04. We ensure you get quality components to keep your automation systems running efficiently and reliably.

Technical specifications

Size	S0
Rated Current	38A
Motor Power	18.5 kW @ 400V
Supply Voltage	200-480V AC
Control Voltage	24V AC/DC
Terminals	Spring-type

Common applications

Conveyor systems

Pump control

Fan applications

Industrial machinery

Motor soft start

Compatible systems

AC induction motors 200-480V AC power systems 24V AC/DC control systems

Also known as

Siemens SIRIUS 3RW30 3RW3028-2BB04 Soft Starter Siemens 38A Soft Starter

Replaces / compatible with

This soft starter is part of the Siemens SIRIUS 3RW30 series, providing controlled motor acceleration. It is a direct replacement for other S0 size soft starters in the same power range.

Technical note

Expert tip

Ensure that the ambient temperature does not exceed 40°C when operating the 3RW3028-2BB04 at its rated current of 38A, or derating will be required.

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Frequently asked questions

What is the control voltage for the Siemens 3RW3028-2BB04 SIRIUS soft starter?

The Siemens 3RW3028-2BB04 SIRIUS soft starter operates with a control voltage of 24V AC/DC. This allows for flexible integration into various control circuits.