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Siemens SIRIUS 3RW55 Soft Starter - 3RW5544-6HA14

Siemens SIRIUS 3RW55 Soft Starter, 200-480V, 250A, Screw Terminals.

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ManufacturerSiemens

Part number3RW5544-6HA14

Voltage 200-480V AC

Current Rating 250 A

Terminals Screw Terminals

Series SIRIUS 3RW55

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Veteran-owned

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Smooth motor start Reduced starting current 250A rating 200-480V AC voltage Screw terminals for easy connection Integrated motor protection

Product description

The Siemens SIRIUS 3RW55 Soft Starter (3RW5544-6HA14) provides smooth and controlled starting of three-phase asynchronous motors. It operates within a voltage range of 200-480V AC and is rated for a high current of 250A, ensuring robust performance for demanding motor applications. This model features convenient screw terminals for secure electrical connections.

Ideal for applications where mechanical stress on the motor and connected equipment needs to be minimized, such as conveyor systems, pumps, and fans. The soft starter reduces starting current, leading to energy savings and extended equipment lifespan. Its advanced features ensure reliable motor protection and optimized starting characteristics.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens SIRIUS 3RW55 Soft Starter. Equip your motor control systems with reliable and efficient starting solutions. Partner with Stanlo for your industrial automation needs.

Technical specifications

Voltage	200-480V AC
Current Rating	250 A
Terminals	Screw Terminals
Series	SIRIUS 3RW55
Type	Soft Starter

Common applications

Conveyor systems

Pump control

Fan control

Compressors

Machine tools

Material handling

Compatible systems

Three-phase asynchronous motors Control systems requiring motor soft-start functionality

Also known as

Siemens Soft Starter 250A SIRIUS 3RW55 Series Motor Soft Starter

Replaces / compatible with

This soft starter replaces direct-on-line or star-delta starters for smoother motor acceleration and reduced electrical stress. Consult Siemens documentation for specific model replacements.

Technical note

Expert tip

Ensure proper heat sinking and ventilation are provided, as a 250A soft starter will dissipate significant heat during motor start-up sequences.

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Frequently asked questions

What is the current rating and voltage range for the Siemens SIRIUS 3RW5544-6HA14 soft starter?

The Siemens SIRIUS 3RW55 Soft Starter (3RW5544-6HA14) is rated for a maximum current of 250 Amperes and operates within an AC voltage range of 200 to 480 Volts, making it suitable for many industrial motor applications.