3RW4036-1BB14

The Siemens SIRIUS 3RW4036-1BB14 soft starter, with an S2 frame and a rated current of 45A, is suitable for 200 to 480V AC three-phase motors, corresponding to 22kW/400V. It is equipped with 110 to 230V AC/DC control voltage and screw terminals, and has a built-in bypass contact to reduce operating heat and energy consumption.

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Siemens 3RW4036-1BB14 SIRIUS Soft Starter 45A Product Image

Product Positioning

The 3RW4036-1BB14 is a simplified soft starter from the Siemens SIRIUS 3RW40 series, with a rated current of 45A, suitable for the progressive start and stop control of 200 to 480V AC three-phase motors.

Core Product Advantages and Features

Gradual start and stop

Using thyristor semiconductor control reduces the current surge and mechanical stress during motor startup, thus minimizing grid voltage drop.

Built-in bypass connection

After startup, it automatically switches to bypass operation to reduce power loss and heat generation during operation.

Wide voltage control design

The control power supply supports 110 to 230V AC/DC, adapting to different plant control voltage environments.

Compact chassis design

The S2 base is compact in size, making it easy to install in existing distribution panels and control boxes.

project	Specification
Rated current	45 A (40°C)
Corresponding power/voltage	22 kW / 400 V
Applicable voltage range	200-480 V AC
Control power supply voltage	110-230 V AC/DC
Terminal block type	Screw terminals
Base size	S2
External dimensions	55 x 160 x 170 mm
Enclosure protection rating	IP20 (Front-facing touch safety)
Insulation voltage	600 V
Pollution level	Level 3 (according to IEC 60947-4-2)
Power components	Thyristor
Built-in functions	Bypass contacts, motor overload protection
Product Series	SIRIUS 3RW40

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