Siemens 3RW4446-6BC44 Soft Starter

Siemens 3RW4446-6BC44 SIRIUS Soft Starter

Product Description

The Siemens 3RW4446-6BC44 is a SIRIUS solid-state soft starter designed for controlling and protecting three-phase AC motors. It provides smooth motor starting and stopping by reducing inrush current and mechanical stress.

Technical Specifications

• Brand: Siemens
• Model: 3RW4446-6BC44
• Product Type: Soft Starter
• Series: SIRIUS 3RW44
• Rated Voltage: 200–460 V AC
• Control Voltage: 230 V AC
• Rated Current: 356 A (40°C)
• Motor Power: 200 kW at 400 V (standard connection)
• Inside-delta Operation: 617 A / 355 kW
• Integrated bypass contact system: Yes
• Protection Functions: Motor overload protection, device protection, thermistor motor protection evaluation
• Connection Type: Screw terminals

Advantages & Features

• Smooth motor starting and stopping
• Reduces starting current and mechanical impact
• Extends motor and equipment service life
• Integrated motor protection functions
• Reliable thyristor-based control technology
• Suitable for heavy-duty industrial applications
• Compact design with easy installation

Applications

• Industrial motor control systems
• Pumps and water treatment equipment
• Fans and ventilation systems
• Compressors
• Conveyors and material handling equipment
• Manufacturing machinery
• Factory automation systems

Notes / Precautions

• Confirm motor voltage and current ratings before installation
• Ensure correct wiring and parameter settings
• Provide proper ventilation and heat dissipation
• Installation and maintenance should be performed by qualified personnel
• Check compatibility with existing Siemens drive systems before replacement