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Siemens 3RW4047-2TB05 SIRIUS Soft Starter - 106A, 75kW, Motor Protection

Siemens 3RW4047-2TB05 SIRIUS S3 soft starter, 106A, 75kW, with motor protection.

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ManufacturerSiemens

Part number3RW4047-2TB05

Rated operational current 106 A

Motor power 75 kW at 500 V

Input voltage 400-600 V AC

Control voltage 24 V AC/DC

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12-month warranty

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Veteran-owned

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Smooth start and stop Thermistor motor protection Spring-type terminals 400-600V AC main voltage 24V AC/DC control voltage

Product description

The Siemens 3RW4047-2TB05 is a SIRIUS S3 soft starter designed for smooth motor acceleration and deceleration, offering enhanced motor protection. It has a rated operational current of 106 A and supports a motor power of 75 kW at 500 V. The unit operates on a voltage range of 400-600 V AC and is controlled by a 24 V AC/DC supply. It features spring-type terminals and includes integrated thermistor motor protection.

This soft starter is ideal for applications where motor overload and overheating are concerns, such as in pumps, fans, compressors, and conveyors. The thermistor protection allows for direct connection of motor PTC thermistors for accurate temperature monitoring and shutdown, preventing damage.

Stanlo Automation, a veteran-owned business specializing in surplus industrial automation parts, offers the Siemens 3RW4047-2TB05. Purchase with confidence from a trusted source for your motor control needs.

Technical specifications

Rated operational current	106 A
Motor power	75 kW at 500 V
Input voltage	400-600 V AC
Control voltage	24 V AC/DC
Terminals	Spring-type
Motor protection	Thermistor

Common applications

Motor control

Pump systems

Fan applications

Compressor control

Conveyor systems

Compatible systems

Compatible with standard industrial motor applications requiring protected startup and operation.

Also known as

Siemens SIRIUS 3RW40 S3 S3 Soft Starter with Thermistor Protection

Replaces / compatible with

This soft starter provides enhanced motor protection compared to basic soft starters, offering a robust solution for demanding applications.

Technical note

Expert tip

For optimal motor protection, ensure the correct type and rating of PTC thermistors are used and properly wired to the control terminals.

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Frequently asked questions

How does the thermistor motor protection work on the Siemens 3RW4047-2TB05?

The integrated thermistor motor protection allows for the connection of PTC thermistors directly from the motor windings. When the motor temperature exceeds a safe limit, the thermistors change resistance, triggering the soft starter to shut down the motor and prevent damage.