3RW4445-6BC44 Siemens Motor Soft Starter 400V

SIRIUS 3RW4445-6BC44 Soft Starter – High-Power Motor Control

Key Technical Specifications

• Brand & Model: Siemens SIRIUS 3RW4445-6BC44 – high-feature soft starter.
• Rated Operational Current (40 °C): 313 A (standard), 542 A (inside-delta).
• Motor Power (400 V, 40 °C): 160 kW (standard), 315 kW (inside-delta).
• Operating Voltage: 200 – 460 V AC, tolerance –15 % / +10 %.
• Control Supply: 230 V AC, 50/60 Hz, tolerance –15 % / +10 %.
• Adjustable Current Limitation: 62 – 313 A for precise motor overload protection.
• Integrated Protection: motor overload, thermistor evaluation, intrinsic device protection.
• Ambient Temperature: up to 60 °C with derating; storage –25 … +80 °C.
• Mechanical Dimensions: 210 mm (W) x 230 mm (H) x 298 mm (D).

Installation & Mounting Guidelines

• Mount the unit vertically using screw fixing; tilt ±22.5° forward/backward, rotate ±90°.
• Maintain clearances: 100 mm above, 75 mm below, and 5 mm sideways for proper airflow.
• Maximum cable length: 500 m; suitable for altitudes up to 5,000 m above sea level.
• Main circuit terminals accept 70 – 240 mm² fine-stranded or 95 – 300 mm² stranded wires.
• Auxiliary terminals support 0.5 – 2.5 mm² solid or fine-stranded with ferrule.

Frequently Asked Questions

• Is the 3RW4445‑6BC44 brand new and original? – Yes, we supply only 100 % new, genuine Siemens SIRIUS products.
• What is the maximum motor power for inside‑delta? – At 400 V, 40 °C, it handles 315 kW (542 A).
• Can I use this soft starter at 60 Hz? – Yes, it operates at 50 or 60 Hz with ±10 % tolerance.
• How do I connect the thermal protection? – Use the PTC resistor inputs; the device evaluates motor temperature directly.
• What is the minimum setting for current limitation? – Adjustable from 62 A up to rated current.
• Does it support external reset? – Yes, the 3RW4445‑6BC44 offers external reset functionality.
• What protection class does it have? – IP00 – suitable for installation in control cabinets.
• Do you offer technical support for installation? – Yes, our team provides application guidance for the SIRIUS series.

For any inquiries or to place an order, please contact us at sales@nex-auto.com or reach us via WhatsApp at +86 153 9242 9628.

Partner NexAuto Technology Limited: https://www.nex-auto.com/