3RW4443-6BC44

The Siemens SIRIUS 3RW4443-6BC44 standard circuit has a rated current of 203A, 352A for internal delta connection, a power of 110kW at 400V, and 200kW for internal delta connection. It operates at 200-460V AC and controls at 230V AC, making it suitable for reduced-voltage starting of small and medium-sized motors.

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Siemens 3RW4443-6BC44 SIRIUS 3RW44 soft starter product image

Product Positioning

The 3RW4443-6BC44 is an entry-level model in the SIRIUS 3RW44 series, suitable for smooth starting of small and medium-sized motors, reducing the instantaneous current surge and mechanical wear.

Core Product Advantages and Features

Entry current specification

The standard circuit has a rated current of 203A, while the internal delta connection can reach 352A, making it suitable for small and medium-sized motors.

230V control circuit

The control voltage is 230V AC, which is compatible with the existing control power supply of most factories in Taiwan.

Bypass connection design

After startup, it automatically switches to bypass operation to reduce thyristor heating and power loss.

thermal resistor overload protection

Built-in thermal resistance evaluation mechanism continuously monitors motor temperature to prevent overheating and damage.

project	Specification
model	3RW4443-6BC44
Standard circuit rated current (400V/40°C)	203 A
Rated current of internal delta circuit	352 A
Standard circuit rated power (400V)	110 kW
Rated power of internal delta circuit (400V)	200 kW
Rated operating voltage	200-460 V AC
Control power supply voltage	230 V AC, 50/60 Hz
Rated insulation voltage	690 V
Protection level	IP00 (IP20 can be achieved by adding a terminal cover)
Dimensions of the outer casing (width x height x depth)	210 x 230 x 298 mm
net weight	Approximately 11.22 kg
Installation method	Secured by screws, can rotate vertically 90°

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The Siemens SIRIUS 3RW4444-6BC34 is the 115V control voltage version of the 3RW4444, with a rated current of 215A, 75hp at 230V and 150hp at 460V, and an operating voltage of 200-460V AC. It features screw terminal wiring and a built-in bypass contact.

3RW4443-6BC36

The Siemens SIRIUS 3RW4443-6BC36 is designed for 400-690V high-voltage power grids, with a control voltage of 115V AC. It shares the same current rating as the 6BC44, with a standard circuit current rating of 203A and an internal delta current rating of 352A. It is suitable for small and medium-sized motors with high-voltage power supply according to European standards.

3RW4443-6BC35

The Siemens 3RW4443-6BC35 soft starter has a rated voltage of 400-600V AC, a standard wiring rating of 180A, and an internal delta wiring rating of 312A. It features a bypass contactor and motor overload protection, and is suitable for smooth start-stop of loads such as pumps and fans.