Siemens 3RW4447-6BC34

SEO Product Description – Siemens 3RW4447-6BC34 SIRIUS Soft Starter

The Siemens 3RW4447-6BC34 is a high-performance SIRIUS soft starter designed for large motor applications where superior control, efficiency, and reliability are critical. Engineered for heavy-duty industrial use, this soft starter supports both standard and inside-delta configurations, making it an ideal solution for high-power motors requiring smooth and controlled startup and shutdown sequences.

With a standard operational current of 385 A and the ability to handle up to 300 HP at 460 V, the 3RW4447-6BC34 is built to support demanding motor loads in diverse applications. When configured in an inside-delta (3-wire) circuit, it can manage up to 667 A, supporting motors as powerful as 600 HP—all while maintaining system efficiency and minimizing electrical stress.

This unit operates on a supply voltage range of 200–460 V AC with a 115 V AC control voltage, making it highly versatile and compatible with a broad range of industrial control systems. Its durable construction allows it to function reliably in environments up to 50°C (122°F) without derating, while the screw terminal connections ensure secure and straightforward installation.

The Siemens 3RW4447-6BC34 belongs to the SIRIUS 3RW44 series, which includes soft starters for advanced motor control functions such as current limiting, adjustable startup parameters, and integrated monitoring. These features help reduce mechanical wear on motors and connected machinery, lower maintenance costs, and improve energy efficiency.

Ideal for use in industries like water treatment, mining, oil and gas, cement, and large-scale manufacturing, this soft starter can effectively control pumps, compressors, blowers, fans, and conveyors. By limiting inrush current and mechanical stress during startup, the 3RW4447-6BC34 ensures extended equipment life and reduced system downtime.

At MRO Electric and Supply, the Siemens 3RW4447-6BC34 is backed by a 2-year warranty and is in stock for immediate shipment. We offer free shipping on all orders, helping you save time and costs while keeping your operations running smoothly.

Frequently Asked Questions (FAQ)

What is the primary function of the Siemens 3RW4447-6BC34?

It provides soft startup and shutdown for large motors, reducing inrush current and mechanical stress.

What is its standard current and horsepower rating?

It supports 385 A and 300 HP at 460 V in standard configurations.

What is the inside-delta current and motor rating?

In the inside-delta (3-wire) configuration, it handles 667 A and up to 600 HP.

What is the operating voltage range?

This unit supports 200–460 V AC for supply voltage.

What control voltage does it require?

The control system operates at 115 V AC.

Can it function in high-temperature environments?

Yes, it performs reliably in conditions up to 50°C (122°F) without derating.

What type of terminal connections are used?

It features screw terminals for safe and easy wiring.

What size motors can it handle?

It's designed for large motors in heavy industrial applications.

What are typical applications for this unit?

Ideal for pumps, compressors, fans, blowers, conveyors, and other high-power motor systems.

Is the Siemens 3RW4447-6BC34 available now?

Yes, it is in stock at MRO Electric, with free shipping and a 2-year warranty included.

Optimize your high-power motor control system with the Siemens 3RW4447-6BC34 SIRIUS soft starter, available now at MRO Electric and Supply for fast delivery, expert support, and unmatched reliability.

Siemens products are manufactured in Germany and are designed for Automotive, aerospace, power generation, and electronics usage. They come with a 2-year warranty from MRO Electric. We also carry Breakers from other manufacturers such as FANUC and Yaskawa.

Contact Us Today For More Information About Siemens Products

Check out the rest of our Siemens product line. Whether it's using our online instant quote feature, giving us a call at (800) 691-8511, or emailing us at sales@mroelectric.com, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 3RW4447-6BC34, take a look at more from our Breakers line. If your current unit has gone bad, take advantage of our Core Exchange program for the most inexpensive route. You can learn more about this program on our FAQ page here. We offer a repair service on all of our 3RW4447-6BC34 products that keep your downtime to a minimum. To stay up to date on manufacturer news, as well as access any of our datasheets, manuals, or other documentation, we suggest you take a look at our blog.