3RW4076-6BB44

The 3RW4076-6BB44 has a rated current of 432A and is compatible with a voltage range of 200 to 460V AC. It comes with a 230V AC control power supply and screw terminals, features a smooth start-up process, and has a bypass operation mechanism to reduce heat loss.

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Siemens 3RW4076-6BB44 SIRIUS soft starter product appearance

Product Positioning

The 3RW4076-6BB44 belongs to the Siemens SIRIUS 3RW40 series of high-current motors, suitable for three-phase motors with a voltage range of 200 to 460V AC. It effectively suppresses starting current surges through voltage ramp-up starting.

Core Product Advantages and Features

High power output

With a rated power of 250kW at 400V, it is sufficient to meet the starting requirements of heavy-duty motors.

230V control power supply

It adopts a 230V AC control voltage design, which facilitates integration with existing standard control circuit wiring.

Screw terminal connection

The main circuit uses busbar connections, while the auxiliary circuit uses screw terminals, ensuring reliable wiring and easy maintenance.

S12 Standard Case

The casing size is compatible with other units in the same series, making it easy to plan and replace existing space in the distribution panel.

project	Specification
Rated current (40°C)	432 A
Rated current (50°C)	385 A
Rated current (60°C)	335 A
Main circuit voltage range	200–460V AC
Control power supply voltage	230V AC (50/60Hz)
Rated power (230V)	132 kW
Rated power (400V)	250 kW
Enclosure protection rating	IP00 (IP20 after capping)
Chassis dimensions (width × height × depth)	160×230×278mm
net weight	Approximately 8.808 kg
Terminal type	Screw terminals (auxiliary/control circuit)
Main circuit wiring method	Busbar terminals
Installation method	Screw fixing
Casing Specifications	S12

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3RW4076-6BB45

The 3RW4076-6BB45 is the highest current rating in the SIRIUS 3RW40 series. With a rated current of 432A, it can handle a wide voltage range of 400 to 600V AC. The built-in bypass contact reduces heat generation during operation, making it more energy-efficient and stable for long-term operation.

3RW4076-2BB44

The 3RW4076-2BB44 and 6BB44 have the same electrical specifications. The difference is that the auxiliary and control circuits use spring terminals instead of screws for fastening. The wires are quickly clamped and not easy to loosen, making them suitable for production line distribution panels that require frequent maintenance.

3RW4075-6BB44

The 3RW4075-6BB44 has a rated current of 356A, corresponding to a voltage range of 200 to 460V AC and a control power supply of 230V AC. It has a built-in thyristor bypass system and motor overload protection, making it more energy-efficient and safer to operate.