Heavy-Duty Motor Control: Siemens 3RW4444 Soft Starter

The Siemens 3RW4444-6BC44 soft starter delivers superior motor control for industrial applications. This high-power unit ensures smooth starts and stops, protecting your equipment from damage.

Why Choose This Soft Starter?

• Massive Power Handling - Up to 250A standard, 433A inside-delta
• Advanced Protection - Motor overload and thermal protection
• Flexible Installation - Multiple mounting positions
• Energy Efficient - Integrated bypass contact saves power

Technical Specifications

• Brand: Siemens SIRIUS
• Model: 3RW4444-6BC44
• Rated Current: 250A @ 40°C (Standard), 433A (Inside-Delta)
• Power Rating: 132kW (Standard), 250kW (Inside-Delta)
• Voltage Range: 200-460V AC
• Control Voltage: 230V AC, 50/60Hz
• Motor Power: 75-250kW (100-335 HP)
• Dimensions: 210×230×298mm
• Weight: Approximately 8.5kg
• Installation Height: Up to 5000m

Easy Installation

Mount in any position. Keep 100mm space above, 5mm sides, 75mm below. Use large cables (70-300mm²). Works up to 5000m altitude.

Warranty & Support

We provide 12-month product warranty. Quick support available.

Shipping Options

Fast worldwide shipping via FedEx, UPS, DHL.

Frequently Asked Questions

What motors work with this 3RW4444 soft starter?

It controls three-phase motors from 75kW to 250kW. Perfect for pumps, fans, and heavy machinery.

How does the inside-delta connection help?

It lets you control larger motors without buying a bigger starter. Saves cost and space.

What protection features are included?

Includes motor overload protection, current limiting, and thermal monitoring for complete safety.

Can I install this in hot environments?

Yes, it works up to 60°C. For temperatures above 40°C, reduce current load as specified.

What cable sizes are needed?

Use 70-300mm² power cables. Follow local electrical codes for proper installation.

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