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Siemens 3RV2021-4AA10


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Part Number3RV2021-4AA10
Model #3RV20214AA10
Warranty2 Year
Category3RV2 circuit breaker
Operating ambient temp-20 … +60°C
Trip classCLASS 10
Impulse voltage resistance6kV
Active power loss8.3 W
Installation altitude2000 m
Main circuit poles3 Poles
Operating current16 A
Operation frequency15 1/h
MountingScrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Height97 mm
Width45 mm
Depth91 mm

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 3RV2021-4AA10 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 3RV2021-4AA10 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 3RV2021-4AA10, 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.

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Ask about exchanging your faulty 3RV2021-4AA10 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 3RV2021-4AA10 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 Contactors from other manufacturers such as FANUC and Yaskawa.

3RV2021-4AA10 Circuit Breaker

The 3RV2021-4AA10 is a circuit breaker from the SIRIUS product brand by Siemens, designed to provide motor protection with a trip class of CLASS 10. It is specifically used to protect motors from overloads and phase disturbances, making it a crucial component in various industrial applications. The circuit breaker is compact and belongs to the S0 size category.


One of the key features of the 3RV2021-4AA10 is its wide operating temperature range, allowing it to function efficiently in diverse environmental conditions. It can withstand temperatures ranging from -50°C to +80°C during storage and transportation and -20°C to +60°C during operation. This level of resilience makes it suitable for use in both extreme cold and hot environments.

The circuit breaker's resistance against shock is also notable, rated at 25g for 11 milliseconds, ensuring its reliability even in harsh working conditions where mechanical stress and vibrations are present.

The product conforms to various standards, including DIN 40719, IEC 204-2, IEC 750, DIN EN 61346-2 F, and DIN EN 60947-6-2, making it a certified and reliable component for motor protection.


In terms of electrical specifications, the 3RV2021-4AA10 is a three-pole circuit breaker with a rated operating voltage of 690V for AC-3 applications. It can handle an operating current of 16A at 400V and a service power of 7,500W at this voltage level. Additionally, it can manage service powers of 7,500W and 11,000W at 500V and 690V, respectively.

The circuit breaker offers adjustable response currents for its non-delayed short-circuit release and current-dependent overload release. For the former, the response current can be set at 208A, while for the latter, it can be set in the range of 11A to 16A, providing flexibility based on the specific motor protection requirements.


As for the mechanical operation, the 3RV2021-4AA10 boasts robustness with its main and auxiliary contacts each rated for 100,000 operating cycles. This longevity ensures a prolonged service life and less frequent replacements, reducing maintenance costs and downtime.

The circuit breaker features an IP20 protection class on the front, providing protection against the ingress of solid objects with a diameter larger than 12.5mm. It also has a degree of pollution 3 rating, indicating its capability to function in moderately dusty environments.


Installation and mounting of the 3RV2021-4AA10 are straightforward, as it can be mounted in any position and comes with screw-type terminals for the main current circuit. The unit can be mounted onto a standard 35 mm mounting rail according to DIN EN 60715.

In summary, the 3RV2021-4AA10 circuit breaker is a reliable and versatile component, offering efficient motor protection in various industrial settings. Its robust design, wide temperature range, and adjustable response currents make it suitable for a broad range of applications. With its adherence to international standards, the circuit breaker provides a high level of safety and protection for motors, ensuring smooth and reliable operation in industrial processes.

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 3RV2021-4AA10, take a look at more from our Contactors 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 3RV2021-4AA10 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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