Product Overview
The 3RW4436-6BC44 is a Siemens SIRIUS soft starter engineered for high-feature applications. It provides reliable motor starting and protection, reducing mechanical stress and optimizing energy use. With a rated operating current of 162 A at 40 °C and an emitted mechanical power of 90 kW at 400 V in standard circuit, this device suits demanding industrial environments.
Key Features & Technical Specifications
- Rated operating current: 162 A at 40 °C (standard circuit)
- Emitted mechanical power: 90 kW at 400 V (standard circuit)
- Inside-delta circuit: 281 A at 40 °C, 160 kW at 400 V
- Operating voltage: 200-460 V AC (standard and inside-delta)
- Control supply voltage: 230 V AC at 50/60 Hz
- Integrated bridging contact system and thyristors
- Motor overload protection and intrinsic device protection
- Adjustable current limitation and inside-delta circuit function
- Protection class IP00
These specifications enable precise motor control, reducing inrush current and mechanical wear, which translates to lower maintenance costs and extended equipment life.
Cost-Benefit & ROI Analysis
Investing in the 3RW4436-6BC44 yields long-term savings through reduced energy consumption and minimized downtime. Its soft-start capability lowers peak current demand, cutting electricity costs. The integrated motor overload protection prevents costly motor failures, while the adjustable current limitation optimizes performance for varying loads. Over time, these features lower total cost of ownership.
Installation & Setup
The 3RW4436-6BC44 features screw fixing for mounting, with a width of 170 mm, height of 200 mm, and depth of 270 mm. It can be mounted on a vertical plane with ±90° rotation and ±22.5° tilt. Maintain clearances: 100 mm upward, 5 mm sideways, and 75 mm downward. The main circuit uses busbar connections, while auxiliary and control circuits use screw-type terminals. Connectable conductor cross-sections range from 16 to 70 mm² for main contacts (box terminal) and up to 120 mm² for DIN cable lugs.
Maintenance & Reliability
Routine inspection of the 3RW4436-6BC44 ensures long-term reliability. Check for dust accumulation and verify all terminal connections are tight. The device operates at ambient temperatures up to 60 °C, with derating above 40 °C. Regular monitoring of operating currents and thermal performance helps prevent unexpected failures, reducing repair costs and downtime.
Compatibility & Integration
The 3RW4436-6BC44 integrates seamlessly into existing motor control systems. It supports three-phase squirrel-cage motors and offers an inside-delta circuit for higher power applications. With a control supply voltage of 230 V AC and an operating frequency of 50-60 Hz, it matches standard industrial power systems. The device includes three NO contacts and one changeover contact for auxiliary signaling, enabling easy integration with PLCs and control panels.
Troubleshooting & Common Issues
Common issues with soft starters include overcurrent trips and thermal overload. The 3RW4436-6BC44 features intrinsic device protection and motor overload protection to mitigate these risks. If a fault occurs, the display provides a fault signal. Check the operating current against the rated values (162 A at 40 °C) and ensure the ambient temperature is within limits. For persistent issues, consult the official Siemens documentation or contact AutoDCSTech.
Product Support & Availability
The 3RW4436-6BC44 is available from AutoDCSTech. Please verify current lifecycle status and availability before ordering. Our team can assist with technical questions and provide documentation.
Availability & Condition at AutoDCSTech
| Part Number | 3RW4436-6BC44 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | Germany |
