Product Overview
The Siemens 3RW4458-6BC44 is a SIRIUS series soft starter designed for industrial automation applications. This 3RW4458-6BC44 module controls motor acceleration and deceleration, reducing mechanical stress and electrical surges. It is a phased-out product, with the preferred successor being the Siemens 3RW5556-6HA14 of the SIRIUS 3RW5 series.
Technical Specifications
- Product brand name: SIRIUS
- Operational current at 40 °C: 970 A
- At inside-delta circuit at 40 °C: 1680 A
- Yielded mechanical performance at 400 V standard circuit: 560 kW
- Operating voltage: 200...460 V AC
- Control supply voltage: 230 V AC at 50/60 Hz
- Power loss typical at 40 °C: 270 W
- Width: 510 mm, Height: 640 mm, Depth: 290 mm
- Protection class: IP00
Industry Applications
The Siemens 3RW4458-6BC44 is suited for heavy-duty motors in conveyors, pumps, and compressors. In standard circuit at 400 V, it delivers 560 kW, while inside-delta circuit reaches 1000 kW. Its adjustable current limitation and motor overload protection make it reliable for mining, water treatment, and manufacturing.
Installation & Setup Guidance
Mount the Siemens 3RW4458-6BC44 using its screw fixing method. Allow spacing: 100 mm upward, 5 mm side, 75 mm downward. Use busbar connection for main circuit and screw-type terminals for auxiliary circuits. For inside-delta circuit configuration, follow the wiring diagram provided in the manual.
Selection Guide & Purchasing Advice
Since the Siemens 3RW4458-6BC44 is phased out, consider upgrading to the Siemens 3RW5556-6HA14 for current projects. For legacy replacements, verify compatibility with your motor specifications. Contact PLC Source PRO (available at ubest101.myshopify.com) for technical support and sourcing options.