3RW4074-6BB44
The 3RW4074-6BB44 has a rated current of 280A and is compatible with 200 to 460V AC and 230V AC control power supplies. It features an S12 chassis with screw terminal wiring, smooth start-up, and bypass power saving and overload protection mechanisms.
Product Positioning
The 3RW4074-6BB44 is a 280A model in the Siemens SIRIUS 3RW40 series, suitable for three-phase motors with a voltage range of 200 to 460V AC, and can effectively reduce the inrush current at the moment of startup.
Core Product Advantages and Features
280A rated current
With a rated power of 160kW at 400V, it is suitable for medium-sized pumps, fans and conveying equipment.
230V standard control voltage
It adopts a 230V AC control power supply and can directly use the existing circuits of general industrial distribution panels.
One-way start-stop design
Suitable for unidirectional motor start-stop applications that do not require forward or reverse rotation, with simple wiring and operation.
Built-in overload and bypass
It integrates motor overload protection and bypass contacts, balancing safety and energy-saving performance.
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3RW4075-6BB35
The 3RW4075-6BB35 is designed for 400 to 600V AC high-voltage main circuits, paired with a 115V AC control power supply. It is commonly used in US standard panel wiring and has a rated current of 356A, which can support the smooth start of medium and large three-phase motors.
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3RW4074-6BB35
The 3RW4074-6BB35 supports high-voltage main circuits from 400 to 600V AC, with a control power supply of 115V AC and a rated current of 280A. It is commonly used in large three-phase motor starting applications in North American standard switchboards.
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3RW4074-6BB34
The 3RW4074-6BB34 main circuit covers 200 to 460V AC, and the control power supply adopts a 115V AC design. It has the same current specification as the 6BB44 version, the difference lies in the selection of control loop voltage.