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2-year Warranty

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Siemens 6FC5372-0AA30-0AA1

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1 in stock

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2 Year warranty

Part Number6FC5372-0AA30-0AA1
Model #6FC53720AA300AA1
Warranty2 Year
PLC 317-3PN/DP
PLC memory512 KB
Processor2.1 GHz
CNC Memory1 GB

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 6FC5372-0AA30-0AA1 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 6FC5372-0AA30-0AA1 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 6FC5372-0AA30-0AA1, 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 : 6lbs

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  • Order within the next 19 hours and 9 minutes.
  • If you order between 4pm and 6pm EST, you will be charged a small rush fee.

Ask about exchanging your faulty 6FC5372-0AA30-0AA1 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 6FC5372-0AA30-0AA1 Overview

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 Accessories from other manufacturers such as FANUC and Yaskawa.

The Siemens 6FC53720AA300AA1, also known as the SINUMERIK 840D SL NCU 720.3 PN, is a sophisticated and highly capable control unit designed for CNC (Computer Numerical Control) applications. Siemens, a renowned multinational corporation, is synonymous with innovation and precision engineering, and the 6FC53720AA300AA1 exemplifies the company's commitment to excellence in manufacturing and automation technology.

Key Specifications

  • Processor: The 6FC53720AA300AA1 is powered by a 2.1GHz processor, ensuring swift and precise execution of machining commands. This level of processing power is crucial in modern CNC systems, as it enables complex computations and real-time adjustments.
  • Memory: It features 3MB of DRAM (Dynamic Random-Access Memory) for efficient data handling and a 1GB CNC memory. Memory capacity is vital for storing program codes, toolpath data, and other critical CNC information. The 512KB PLC memory complements the unit's capabilities, allowing for versatile control and automation.
  • Connectivity: Equipped with Profinet (PN) connectivity, this control unit is well-suited for seamless integration into industrial networks. It can communicate with various components and devices, facilitating efficient data exchange and process control. The inclusion of PLC 317-3PN/DP enhances its versatility, enabling both CNC and PLC functionality.
  • Energy Efficiency: The 6FC53720AA300AA1 incorporates an internal heat dissipation system, which is essential for maintaining optimal operating temperatures in demanding industrial environments. Efficient heat dissipation ensures the longevity and reliability of the control unit, even during prolonged operation.

Product Type Info: SINUMERIK

The SINUMERIK series is a well-established and highly regarded product line by Siemens, specifically designed for CNC applications. SINUMERIK control systems are known for their precision, flexibility, and user-friendly interfaces, making them an industry standard in manufacturing and machining.


The 6FC53720AA300AA1 control unit finds application in various industries where CNC machining is essential. It excels in:

  1. Precision Machining: Whether it's milling, turning, grinding, or any other machining process, the 6FC53720AA300AA1 ensures precise and repeatable results, making it ideal for industries that demand high tolerances.
  2. Automation: With its PLC functionality and Profinet connectivity, this control unit can be integrated into automated production lines, allowing for seamless coordination between CNC machining and other industrial processes.
  3. Aerospace: The aerospace industry relies heavily on CNC technology for manufacturing critical components. The 6FC53720AA300AA1 meets the stringent demands for accuracy and reliability in aerospace machining.
  4. Automotive: From engine parts to body components, CNC machining plays a vital role in automotive manufacturing. This control unit can handle the complexity and volume of tasks required in the automotive sector.
  5. Medical Device Manufacturing: In the production of medical devices and implants, precision is non-negotiable. The 6FC53720AA300AA1 ensures that intricate designs and tight tolerances are met consistently.

In conclusion, the Siemens 6FC53720AA300AA1 represents a standard of CNC control technology. Its robust hardware, ample memory, and versatile connectivity options make it suitable for a wide range of industrial applications. As part of the SINUMERIK product family, it carries Siemens' legacy of precision and innovation, enabling manufacturers to achieve superior results in their machining operations. Whether in aerospace, automotive, medical, or other industries, this control unit is a dependable choice for those seeking top-tier CNC performance.

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 6FC5372-0AA30-0AA1, take a look at more from our Accessories 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 6FC5372-0AA30-0AA1 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.

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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