3RW4426-1BC35

The SIRIUS 3RW44 high-voltage model has a main circuit covering 400 to 600 volts AC. The standard rated capacity for 400 volts is 77 amps and 37 kilowatts, while the capacity for 575 to 600 volts corresponds to 50 horsepower. The control voltage is 115 volts, and the unit weighs approximately 5.69 kg, making it compact and easy to install.

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Product photo of Siemens 3RW4426-1BC35 SIRIUS high-voltage soft starter

Product Positioning

The 3RW4426-1BC35 is a high-voltage soft starter from the Siemens SIRIUS 3RW44 series. Its main circuit supports 400 to 600 volt power grids and reduces the current surge during high-voltage motor startup by gently regulating the voltage through thyristors. It is suitable for small and medium-power motors in North America and other high-voltage power distribution systems.

Core Product Advantages and Features

Covering 400 to 600 volt power grids

The main circuit has a wide voltage range, and the same model can meet the motor starting requirements of high-voltage power distribution systems in multiple countries.

Clear comparison of multiple voltages and power

37 kW at 400 volts, 45 kW at 500 volts, and 50 horsepower at 575 to 600 volts; a complete selection reference is available.

115-volt control circuit

The control voltage is 115 volts AC, making it easy to use directly with existing low-voltage control panel power supplies.

The machine is lightweight and easy to install.

The unit weighs approximately 5.69 kg, and its box-type main circuit terminals are equipped with screw control terminals, making maintenance and wiring easy.

project	Specification
model	3RW4426-1BC35
Product Type	SIRIUS 3RW44 Soft Starter
Standard circuit rated current (40/50/60℃)	77 / 68 / 59 A
Internal delta connection current (40/50/60℃)	133 / 118 / 102 A
400-volt standard circuit power	37 kW
500-volt standard circuit power	45 kW
575-600 volts standard horsepower	50 HP
Main circuit rated voltage range	400～600 V AC
Control power supply voltage	115 V AC, 50/60 Hz
Terminal type	Box-type terminals (main circuit) / Screw terminals (control circuit)
External dimensions (width × height × depth)	170×192×270 mm
Product weight	Approximately 5.69 kg

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