3RW4435-2BC35

The SIRIUS 3RW44 series soft starter has a rated current of 117 amps, supports 75 horsepower standard start and 100 horsepower internal delta connection, and has a control voltage of approximately 115 volts. The spring-loaded terminal design speeds up panel wiring efficiency and is suitable for smooth start-stop applications of small and medium power motors.

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Product photo of Siemens 3RW4435-2BC35 SIRIUS soft starter

Product Positioning

The 3RW4435-2BC35 is a small soft starter from the Siemens SIRIUS 3RW44 series. By controlling the thyristor conduction angle, it gradually increases the motor terminal voltage, reducing the inrush current and mechanical shock at the moment of startup. It is suitable for smooth start-stop control of small and medium power three-phase motors such as conveyors and pumps.

Core Product Advantages and Features

Spring-type terminal wiring

The main circuit adopts a spring-type terminal design, which allows for quick crimping of wires without tools, shortening panel assembly and maintenance time.

Dual-circuit current output

It offers two output modes: a standard connection of 117 amps and an internal delta connection of approximately 100 horsepower, allowing for flexible selection based on the motor's wiring method.

Built-in bypass connection

After startup, it automatically switches to bypass operation to reduce the continuous heating of the thyristor and extend the service life of the component.

Electronic motor protection

Built-in overload and phase loss detection, it trips immediately in case of abnormality to protect the safety of downstream motors and transmission mechanisms.

project	Specification
model	3RW4435-2BC35
Product Type	SIRIUS 3RW44 Miniature Soft Starter
Standard circuit rated current	117 A
Standard circuit power	75 HP
Internal delta connection power	100 HP
Main circuit rated voltage range	200～460 V AC
Control power supply voltage	Approximately 115–120 V AC, 50/60 Hz
Terminal type	Spring-loaded (screwless) terminals
Enclosure protection rating	IP00, IP20 can be achieved by adding a terminal cover.
External dimensions (width × height × depth)	170×200×270 mm
Installation method	Screws that can rotate vertically ±90 degrees for fixing
Applicable to	The three-phase asynchronous motor starts and stops smoothly.

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