3RW5244-6AC14

The SIRIUS 3RW5244-6AC14 is a general-purpose soft starter with a rated current of 250A. It features a screw terminal analog output design, a built-in bypass contactor, and optional PROFINET/PROFIBUS communication modules. It is suitable for the gradual start and stop control of medium and large three-phase asynchronous motors.

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Siemens SIRIUS 3RW5244-6AC14 soft starter physical appearance image

Product Positioning

The 3RW5244-6AC14 is a general-purpose soft starter in the SIRIUS 3RW52 series. It has a rated current of up to 250A and can provide starting capacity from 132kW to 250kW depending on the motor wiring method. It is suitable for production lines with high requirements for starting smoothness and communication integration.

Core Product Advantages and Features

Built-in bypass contactor

During operation, it automatically switches to the bypass circuit to reduce heat generation, extend the service life of the soft starter, and improve energy efficiency.

Analog output monitoring

It provides 4-20mA or 0-10V analog signal output, making it easy to integrate with existing monitoring systems to read operating status.

Flexible expansion of communication modules

It supports optional PROFINET, PROFIBUS or Modbus TCP modules, making it easy to integrate into existing automation networks.

Wide range of control power supplies

Designed with 110-250V AC/DC control power supply, it can flexibly adapt to the existing power supply specifications of different factories.

project	Specification
Rated current	250 A (40°C)
Applicable main circuit voltage	200–480 V AC
Control power supply voltage	110–250 V AC/DC
Power (3-wire internal connection, 400V)	132 kW
Power (6-wire delta connection, 400V)	250 kW
Product Series	SIRIUS 3RW52 General Performance
Terminal type	Screw terminals
Output type	Analog output (4-20mA / 0-10V)
Communication Interface	Optional PROFINET / PROFIBUS / Modbus TCP module
Protection level	IP00 (IP20 can be achieved by adding a terminal cover)
Built-in functions	Built-in bypass contactor
Casing size	Approximately 210 x 202.5 x 388 mm
weight	Approximately 9.9 kg
Applicable to	Three-phase asynchronous motor start/stop control

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3RW5244-6TC14

3RW5244-6TC14 has a rated current of 250A, is suitable for 200-480V three-phase motors, has a built-in thermistor input, a control voltage of 110-250V AC, a motor reference power of 132kW with 400V standard wiring and 250kW with internal delta wiring, and a UL rated power of 75HP with 230V and 150HP with 480V.

3RW5244-6AC05

This model is a 24V AC/DC version of the 3RW5244 series, with a rated current of 250A. It is suitable for 200-600V main circuits, features screw terminals and analog output design, and can be equipped with various communication modules to facilitate integration into equipment and machines with low-voltage DC control circuits.

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.