3RW4446-6BC34

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.

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Siemens 3RW4446-6BC34 SIRIUS 3RW44 soft starter product image

Product Positioning

3RW4446-6BC34 and 3RW4446-6BC44 belong to the same current rating. The main difference is that the control voltage is changed to 115V AC, which is suitable for factories that use low-voltage systems for control circuits.

Core Product Advantages and Features

115V control voltage

The control circuit is designed with 115V AC, which facilitates integration with existing low-voltage control systems.

High current carrying capacity

The 460V standard circuit has a rated current of 315A, while the internal delta connection can reach 546A, supporting large loads.

Bypass connection design

After startup, it automatically switches to bypass operation to reduce heat generation and extend the thyristor life.

Flexible installation method

It supports screw fixing and can be installed by vertical rotation, making wiring construction more flexible.

project	Specification
model	3RW4446-6BC34
Standard circuit rated current (460V/50°C)	315 A
Rated current of internal delta circuit (50°C)	546 A
Standard circuit rated power (460V)	250 hp
Rated power of internal delta circuit (460V)	450 hp
Rated operating voltage	200-460 V AC
Control power supply voltage	115 V AC, 50/60 Hz
Protection level	IP00 (IP20 can be achieved by adding a terminal cover)
Installation method	Secured by screws, can rotate vertically
Extreme number	3P
Built-in functions	Bypass contact system, internal delta wiring capability

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3RW4446-6BC44

The Siemens SIRIUS 3RW4446-6BC44 standard circuit has a rated current of 356A and an internal delta connection of 617A. The power is 200kW under 400V and 355kW under 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 heavy-duty equipment such as large conveyors and crushers.

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.

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.