3RW4445-6BC44

The Siemens SIRIUS 3RW4445-6BC44 standard circuit has a rated current of 313A and an internal delta connection of 542A. The power is 160kW at 400V and 315kW at internal delta connection. The operating voltage is 200-460V AC, and the control voltage is 230V AC. It is suitable for the reduced voltage start-up of medium and large pumps.

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Product image of Siemens 3RW4445-6BC44 SIRIUS 3RW44 soft starter

Product Positioning

The 3RW4445-6BC44 is a mid-range soft starter in the SIRIUS 3RW44 series. It uses thyristors to control the gradual voltage change, reducing the impact on the power grid and mechanical transmission during motor startup.

Core Product Advantages and Features

Stable current output

The standard circuit has a rated current of 313A, while the internal delta connection can reach 542A, making it suitable for medium and large motor applications.

230V control voltage

The control circuit uses 230V AC, which is compatible with the existing control power supply in most Taiwanese factories.

Bypass contact energy saving

After startup, the bypass contact is switched to operate, reducing thyristor heating and power loss.

Precise overload protection

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

project	Specification
model	3RW4445-6BC44
Standard circuit rated current (400V/40°C)	313 A
Rated current of internal delta circuit	542 A
Standard circuit rated power (400V)	160 kW
Rated power of internal delta circuit (400V)	315 kW
Rated operating voltage	200-460 V AC
Control power supply voltage	230 V AC, 50/60 Hz
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 11.16 kg
Installation method	Screw fixing
Built-in functions	Bypass contact system, internal delta wiring capability

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The Siemens SIRIUS 3RW4446-6BC34 is the 115V control voltage version of the 6BC44. It has a standard current of 315A at 460V and 546A for internal delta circuits. The operating voltage is 200-460V AC. It has a built-in bypass contact and is suitable for standard 115V control circuits in factories.

3RW4445-6BC34

The Siemens SIRIUS 3RW4445-6BC34 is the 115V control voltage version of the 3RW4445, with a rated current of 280A, 100hp at 230V and 200hp at 460V, and an operating voltage of 200-460V AC. It features screw terminal wiring and a built-in bypass contact.

3RW4444-6BC44

The Siemens SIRIUS 3RW4444-6BC44 standard circuit has a rated current of 250A, 433A for internal delta connection, a power of 132kW at 400V, and 250kW for internal delta connection. The operating voltage is 200-460V AC, and the control voltage is 230V AC. It is suitable for reduced voltage starting of medium-sized conveyor belts.