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Siemens SIRIUS 3RW4073-6AB44 Soft Starter (S12)

Siemens SIRIUS S12 Soft Starter

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ManufacturerSiemens

Part number3RW4073-6AB44

Series SIRIUS 3RW40

Size S12

Operating Current 134A (at 40°C)

Rated Power 75kW (at 400V)

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Soft Starting Capability Reduced Current Peaks Motor Overload Protection S12 Size 134A Rating 75kW Power Output

Product description

The Siemens 3RW4073-6AB44 is a SIRIUS soft starter, part of the S12 size series, designed for the soft starting and ramp-down of three-phase asynchronous motors. It offers an operating current of 134A at 40°C and is rated for 75kW at 400V. The control supply voltage is 200-460V AC, with a 230V AC control voltage.

This soft starter is suitable for applications requiring reduced current peaks, minimized voltage fluctuations, and decreased mechanical stress during motor startup. It features screw terminals and is supplied without a bypass contactor. Note that this is a phased-out product, with the SIRIUS 3RW5 series being its successor.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RW4073-6AB44. Secure this component for your motor control needs and rely on our commitment to providing quality industrial parts.

Technical specifications

Series	SIRIUS 3RW40
Size	S12
Operating Current	134A (at 40°C)
Rated Power	75kW (at 400V)
Control Voltage	200-460V AC
Control Supply	230V AC
Terminals	Screw Terminals
Bypass	Without

Common applications

Motor Starting

Pump Control

Fan Control

Conveyor Systems

Industrial Machinery

Three-Phase Motors

Compatible systems

Three-phase asynchronous motors

Also known as

Siemens Sirius Soft Starter S12 3RW40736AB44

Replaces / compatible with

This is a phased-out product. The successor is the SIRIUS 3RW5 series.

Technical note

Expert tip

Although phased out, this soft starter can still be a viable option if compatible with existing system requirements.

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Frequently asked questions

What is the maximum motor power rating for the Siemens 3RW4073-6AB44 soft starter?

The Siemens 3RW4073-6AB44 SIRIUS soft starter is rated for a maximum motor power of 75 kW at 400V or 37 kW at 230V.