3RW5243-6TC15

The SIRIUS 3RW5243-6TC15 is a general-purpose soft starter with a rated current of 210A. It uses a thermistor (PTC) input instead of an analog output to directly monitor the motor winding temperature. Its screw terminal design makes it suitable for applications with high requirements for motor overheat protection.

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Siemens SIRIUS 3RW5243-6TC15 Temperature Sensing Soft Starter Appearance Image

Product Positioning

The 3RW5243-6TC15 is a version of the 3RW52 series equipped with a thermistor input function. It has a rated current of 210A and can read the signal from the built-in temperature sensor of the motor winding in real time, providing more direct overheat protection than a typical analog output.

Core Product Advantages and Features

Thermistor input

It can be connected to the motor's built-in PTC or Klixon temperature sensing element to directly monitor the winding temperature and prevent overheating and burnout.

High current load capacity

With a rated current of up to 210A, it is suitable for frequent start-stop applications of medium and large three-phase motors.

Flexible control power supply

Designed for 110-250V AC control power supply, compatible with the voltage of existing control circuits in most factories.

Modular communication expansion

It can be equipped with PROFINET, PROFIBUS and other modules to be integrated into the existing factory automation network.

project	Specification
Rated current	210 A (40°C)
Applicable main circuit voltage	200–600 V AC
Control power supply voltage	110–250 V AC
Power rating (3-wire internal connection, 400V, refer to the same current rating)	Approximately 110 kW
Product Series	SIRIUS 3RW52 General Performance
Terminal type	Screw terminals
Input type	Thermistor (PTC) input
Communication Interface	Optional PROFINET / PROFIBUS / Modbus TCP module
Protection level	IP00
Applicable to	Three-phase asynchronous motor start/stop control, applications requiring motor temperature monitoring.

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