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Siemens ECOFAST Motor Starter - 4kW, 2.4-9.0A, PROFIBUS DP

Siemens ECOFAST Motor Starter with PROFIBUS DP and electronic overload protection.

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ManufacturerSiemens

Part number3RK1303-5CS44-3AA0

Motor Power 4 kW (AC-3, 400 V)

Current Range 2.40 A to 9.00 A

Protection Electronic overload, Mechanical switching

Inputs 4 DI, 24 V DC

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12-month warranty

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Veteran-owned

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Electronic Overload Protection PROFIBUS DP Interface Mechanical Switching AC-3 Rating up to 4kW 4 Digital Inputs Touch-protected Han Connectors

Product description

The Siemens ECOFAST motor starter, part number 3RK1303-5CS44-3AA0, is designed for reliable motor control in industrial applications. It offers AC-3 motor protection up to 4 kW at 400V and an adjustable current range of 2.40 A to 9.00 A. This starter features electronic overload protection and mechanical switching for robust operation.

Equipped with 4 digital inputs (24V DC) and a PROFIBUS DP interface, this motor starter facilitates integration into modern automation systems. It is designed for connection via Han Q4/2 and Han 10E connectors with touch protection, ensuring safe and secure electrical connections. This unit does not include a brake contact.

Source your Siemens 3RK1303-5CS44-3AA0 ECOFAST motor starter from Stanlo Automation, a veteran-owned surplus parts distributor. We provide dependable automation components to keep your operations running smoothly.

Technical specifications

Motor Power	4 kW (AC-3, 400 V)
Current Range	2.40 A to 9.00 A
Protection	Electronic overload, Mechanical switching
Inputs	4 DI, 24 V DC
Communication	PROFIBUS DP
Connections	Han Q4/2, Han 10E
Features	Without brake contact

Common applications

Motor control

Pump systems

Fan control

Conveyor systems

Machine tools

Packaging machinery

Industrial automation

Compatible systems

Siemens PROFIBUS DP network PLC systems with PROFIBUS DP interface AC motors up to 4kW at 400V

Also known as

Siemens ECOFAST starter, 3RK1303-5CS44-3AA0, Siemens PROFIBUS motor starter

Replaces / compatible with

This motor starter replaces older electromechanical contactors and overload relays, offering integrated protection and communication capabilities for modern control systems.

Technical note

Expert tip

When connecting to PROFIBUS DP, ensure the correct baud rate and network address are configured on the starter and the master controller for proper communication.

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Frequently asked questions

What is the current adjustment range for the Siemens 3RK1303-5CS44-3AA0 ECOFAST motor starter?

The Siemens 3RK1303-5CS44-3AA0 ECOFAST motor starter has an adjustable current range from 2.40 A to 9.00 A. This allows for precise setting of the overload protection to match the motor's requirements.