Receive a Text Quote
We will send you price and availability shortly
Invalid number. Please call (800) 691-8511
Looking for a fast quote? Click here, and we'll text you.

2-year Warranty

Same Day Shipping

Siemens 3RW4076-6BB34

SIRIUS SOFT STARTER S12, 385 A, 300 HP/460 V, 50 DEG., 200-460 V AC, 115 V AC, SCREW TERMINALS

2 ratings

1 Available

Free Shipping

2 Year warranty

Part Number3RW4076-6BB34
Model #3RW40766BB34
Warranty2 Year

Our Repair Services

MRO Electric repairs CNCs, PLCs, Servo/Spindle Drives, Motors, Amplifiers, VFDs, HMIs, and more, most of which can be repaired in only 3-5 days.

Repair Benefits

MRO can restore your failed 3RW4076-6BB34 to remanufactured condition and save you up to 75% compared to buying new. We offer standard repair pricing to ensure you the best value for your repair.

Our certified technicians use rigorous testing procedures to ensure your parts are restored to fully functioning condition. Our team proudly stands behind all repairs by providing a minimum 2-year warranty.

Our technicians have vast experience with most manufacturers and models. In addition to this 3RW4076-6BB34 we also repair a wide range of other Siemens products, so if you don’t see the model you need, please contact us.

Core Exchange

If you are interested in getting credit for your faulty 3RW4076-6BB34, just let us know, and we can issue you an RMA to send it in as an exchange. Our exchange program provides you with savings and keeps us stocked for the next time you need anything.

  • Shipping Weight : 1lb

Want it shipped today?

  • Order within the next 7 hours and 11 minutes.
  • If you order between 4pm and 6pm EST, you will be charged a small rush fee.

Ask about exchanging your faulty 3RW4076-6BB34 for credit when ordering from MRO Electric

MRO Electric provides a 2-year warranty on every item we sell and repair. We stand behind all of our products and guarantee them for the full 2 years. If there is an issue with any of our products within the warranty period, we will evaluate the unit and repair or replace it under warranty.

Siemens 3RW4076-6BB34 Overview

Siemens 3RW4076-6BB34 Sirius Soft Starter

The Siemens 3RW4076-6BB34 Sirius Soft Starter is a reliable solution for industrial motor control, facilitating smooth and efficient operation across various applications. As part of Siemens' renowned Sirius line, this soft starter embodies precision engineering and advanced technology to ensure seamless motor startup and protection.

Efficient Motor Control with S12 Series

The 3RW4076-6BB34 model, belonging to the S12 series, offers robust motor control capabilities, catering to industrial setups with demanding requirements. With a rated current of 385 A and compatibility with motors up to 300 HP at 460 V, it empowers industries to manage heavy loads easily and precisely, ensuring optimal performance and longevity of connected equipment.

Enhanced Flexibility and Compatibility

Equipped to handle a wide range of voltage inputs, ranging from 200 to 460 V AC, the Siemens 3RW4076-6BB34 soft starter provides enhanced flexibility in system integration. Its compatibility with various voltage standards enables seamless deployment across diverse industrial environments, offering versatility and ease of use. A dedicated 115 V AC control voltage also ensures reliable operation and precise control over motor functions.

Temperature Optimization for Durability

Operating in environments with elevated temperatures can pose challenges for motor control equipment. However, the Siemens 3RW4076-6BB34 soft starter is engineered to thrive under such conditions. Its 50-degree rating maintains stable performance even in high-temperature settings, safeguarding against overheating and ensuring long-term durability and reliability.

User-Friendly Installation with Screw Terminals

Ease of installation is paramount in industrial settings where efficiency and productivity are critical. The Siemens 3RW4076-6BB34 soft starter features screw terminals, simplifying the wiring process and expediting setup procedures. This user-friendly design reduces installation time and effort, enabling operators to deploy the soft starter quickly and efficiently, minimizing downtime, and maximizing productivity.

Comprehensive Protection Features

Ensuring equipment and personnel safety is a top priority in industrial environments. The Siemens 3RW4076-6BB34 soft starter incorporates comprehensive protection features to mitigate risks and prevent damage during operation. From overload protection to phase failure detection, it offers a range of safeguards to maintain motor integrity and enhance system reliability, providing peace of mind to operators.

Frequently Asked Questions (FAQ) about Siemens 3RW4076-6BB34 Sirius Soft Starter

1. What is the Siemens 3RW4076-6BB34 Sirius Soft Starter?

The Siemens 3RW4076-6BB34 Sirius Soft Starter is a motor control device designed to facilitate industrial motors' smooth and efficient operation. It is part of Siemens' Sirius line of soft starters, which is known for its reliability and advanced features.

2. What are the key specifications of the Siemens 3RW4076-6BB34 Sirius Soft Starter?

Key specifications of this soft starter include:

  • Model: 3RW4076-6BB34
  • Series: S12
  • Rated current: 385 A
  • Compatibility: Motors up to 300 HP at 460 V
  • Voltage range: 200-460 V AC
  • Control voltage: 115 V AC
  • Terminal type: Screw terminals

3. What applications is the Siemens 3RW4076-6BB34 Sirius Soft Starter suitable for?

This soft starter is suitable for various industrial applications requiring motor control, including:

  • Pumps
  • Fans
  • Compressors
  • Conveyors
  • Mixers

4. How does the Siemens 3RW4076-6BB34 Sirius Soft Starter enhance motor control?

The Siemens 3RW4076-6BB34 Sirius Soft Starter enhances motor control by providing smooth and gradual acceleration and deceleration of the motor, reducing mechanical stress and wear. It also offers comprehensive protection features to safeguard the motor and connected equipment against overload, phase failure, and other potential risks.

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, we strive for customer satisfaction first. This means lower prices and better service for you. For more products like 3RW4076-6BB34, 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 3RW4076-6BB34 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.

5 stars

4.9 Overall Satisfaction Rating

Over 1700 Ratings from Actual Customers

Read Our Reviews

Very happy with the overall service, delivery, communication and delivery,

Conley Cooke

I needed a special drive, found it, and I was quickly assisted by Joe Kaminski. Everything was exactly as it should be....


We have an older DMU80 CNC Machine and the Handheld Control was damaged beyond repair. MRO was very helpful in confirmin...

Abbey-Purchasing Specialist