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Marvo Part ID: MV-291L

£33.46 (ex. VAT)


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We accept card payments from all major credit, debit and Mastercard providers including Visa, American Express, Western Union, Paypal and bank transfers. Before you complete an order you will be prompted to input your payment details, at which point you can enter the relevant card information you wish to use for your transaction. If you are experiencing issues with your payment method then you can contact our team via email here. From there, you will be directed to the most relevant resource or person to help you complete your payment, get your order processed and ensure that your parts are on the way to your delivery address.


Is my order covered by a warranty?

Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.


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Marvo currently delivers to the United Kingdom (excluding Northern Ireland), the United States of America and Germany. If you cannot find your delivery address at checkout, this is most likely because Marvo does not currently deliver to this location. There are ongoing efforts to make Marvo accessible to a global market, keep your eyes peeled as our service expands to new locations. All orders are sold with a streamlined delivery process ensuring that you get your part, fast. Marvo is designed to offer you quick, easy and reliable access to critical components and uses well established global shipping services, including but not limited to DHL, UPS and FedEx.


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Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services.  Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.


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Marvo takes pride in product quality and has put several measures in place to assure high levels of quality standards. For your peace of mind, all parts have been ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. Redefine convenience and secure priority delivery on all parts along with a comprehensive 12-month warranty. This is the smart new way to buy automation and control components.


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3RV1021-0KA10 Product Description

The Siemens 3RV1021-0KA10 is a robust circuit breaker designed for motor protection, ensuring the safe and efficient operation of machinery in various industrial settings. This component is part of the SIRIUS product family, renowned for its reliability and performance. With a Class 10 trip class, it provides precise protection for motors by disconnecting power in the event of an overload or short circuit.

This circuit breaker is rated for a 690 V operating voltage and has an adjustable pick-up value current of the current-dependent overload release ranging from 0.9 to 1.25 A. Its compact dimensions, 45 x 91 x 97 mm, make it suitable for installation in tight spaces, while the screw-type terminals facilitate a secure and straightforward electrical connection.

Engineered to withstand challenging industrial environments, it can be mounted in any orientation and is designed to snap onto a 35 mm standard mounting rail according to DIN EN 50022. The product is also finger-safe, providing additional protection against electrical shock during operation and maintenance.

The 3RV1021-0KA10 is a critical component for the protection and management of industrial motors, contributing to the longevity and efficiency of your machinery. Its design and construction are a testament to Siemens' commitment to quality and innovation in industrial control technology.

Frequently Asked Questions

What is the voltage rating for this circuit breaker?

The circuit breaker is rated for an operating voltage of up to 690 V.

Can this circuit breaker be used for motor protection?

Yes, this circuit breaker is specifically designed for motor protection.

What is the current adjustment range for the overload release?

The current-dependent overload release can be adjusted from 0.9 to 1.25 A.

What is the trip class of this circuit breaker?

The circuit breaker has a trip class of CLASS 10.

What are the dimensions of this circuit breaker?

The dimensions of the circuit breaker are 45 mm in width, 97 mm in height, and 96 mm in depth.

Is there an auxiliary switch available for this circuit breaker?

Yes, the circuit breaker includes an auxiliary switch.

What is the mechanical service life of the main contacts?

The main contacts have a typical mechanical service life of 100,000 switching cycles.

What type of terminals does this circuit breaker have?

This circuit breaker features screw-type terminals for the main current circuit.

Can this circuit breaker be mounted on a DIN rail?

Yes, it can be mounted using screw and snap-on mounting onto a 35 mm standard mounting rail according to DIN EN 50022.

What is the maximum short-circuit current breaking capacity?

The maximum short-circuit current breaking capacity (Icu) is 100 kA at voltages up to 690 V.