SIRIUS SOFT STARTER, S12, 248 A, 250 HP/575 V, 50 DEG., 400-600 V AC, 115 V AC, SCREW TERMINALS
1 in stock
Ships Today
Free Shipping
2 Year warranty
| Part Number | 3RW4074-6BB35 |
| Manufacturer | Siemens |
| Type | Breakers |
| Model # | 3RW40746BB35 |
| Warranty | 2 Year |
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.
MRO can restore your failed 3RW4074-6BB35 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 3RW4074-6BB35 we also repair a wide range of other Siemens products, so if you don’t see the model you need, please contact us.
If you are interested in getting credit for your faulty 3RW4074-6BB35, 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.
Want it shipped today?
Ask about exchanging your faulty 3RW4074-6BB35 for credit when ordering from MRO Electric
The Siemens 3RW4074-6BB35 is a powerful and efficient SIRIUS soft starter, built for demanding industrial applications where high-performance motor control is essential. Designed to reduce mechanical stress, limit inrush current, and protect connected equipment, this soft starter ensures smooth, controlled motor startup and shutdown. With a rated current of 248 A and the ability to handle motors up to 250 HP at 575 V, this device is ideal for heavy-duty systems such as pumps, compressors, conveyors, and fans.
This model is part of the SIRIUS 3RW40 series, Siemens' robust and space-saving solution for motor soft starting. The 3RW4074-6BB35 operates within a wide voltage range of 400 to 600 V AC and uses a 115 V AC control voltage, making it highly adaptable to a variety of industrial settings. Its Size S12 classification makes it suitable for large motors, while the screw terminal connections simplify wiring and installation, reducing setup time and improving reliability.
By gradually ramping up voltage during startup, this Siemens soft starter helps minimize torque shock and prolong the life of motors, gearboxes, and mechanical components. It is especially beneficial for applications where reduced wear and energy efficiency are priorities. Additionally, the soft shutdown feature ensures a smooth stop without sudden halts, which is critical in systems where product flow or mechanical stability must be maintained.
Built to withstand high ambient temperatures up to 50°C (122°F) without derating, the Siemens 3RW4074-6BB35 delivers dependable performance even in harsh environments. It is engineered to meet global industrial standards and integrates easily into motor control centers, distribution panels, and automation systems.
Available now at MRO Electric and Supply, this soft starter includes a 2-year warranty and is in stock for immediate shipping. We offer free shipping to help you reduce lead times and keep your operations running efficiently.
What is the Siemens 3RW4074-6BB35 used for?
It is used to control the soft startup and stop of large three-phase AC motors in industrial applications.
What motor power does it support?
It supports motors up to 250 HP at 575 V, making it ideal for heavy-duty equipment.
What is the voltage range for operation?
This unit operates on 400–600 V AC and uses a 115 V AC control voltage.
What is the rated current?
The device is rated at 248 amps, suitable for large-scale motors.
What size classification is this unit?
It is a Size S12 soft starter in the Siemens SIRIUS line.
Does it reduce mechanical wear?
Yes, it reduces torque and current surges during startup, protecting motors and connected components.
How is it mounted and wired?
It uses screw terminal connections, ensuring secure and simple wiring.
Is it suitable for high-temperature environments?
Yes, it can operate at up to 50°C (122°F) without performance loss.
Is the Siemens 3RW4074-6BB35 available now?
Yes, it is in stock at MRO Electric and ready for immediate shipping.
Does it come with a warranty?
Yes, MRO Electric offers a 2-year warranty on this product for added peace of mind.
Choose the Siemens 3RW4074-6BB35 for high-powered motor control with reliability, efficiency, and ease—available now at MRO Electric and Supply.
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.
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 3RW4074-6BB35, 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 3RW4074-6BB35 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.
Very happy with the overall service, delivery, communication and delivery,
Conley CookeI needed a special drive, found it, and I was quickly assisted by Joe Kaminski. Everything was exactly as it should be....
JackWe have an older DMU80 CNC Machine and the Handheld Control was damaged beyond repair. MRO was very helpful in confirmin...
Abbey-Purchasing Specialist
SIRIUS SOFT STARTER S12, 248 A, 200 HP/460 V, 50 DEG., 200-460 V AC, 115 V AC, SCREW TERMINALS
SIRIUS SOFT STARTER, S12, 280 A, 160 KW/400 V, 40 DEG., 200-460 V AC, 230 V AC, SCREW TERMINALS
SIRIUS SOFT STARTER, S12, 205 A, 200 HP/575 V, 50 DEG., 400-600 V AC, 115 V AC, SCREW TERMINALS
© copyright 2025
.jpg)