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Siemens

3SB3921-0AA

£19.43 (ex. VAT)

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Marvo Stock ID MV-781V
HS Code 85389099
SKU 3SB3921-0AA
Condition Used
Warranty 12 months
Weight (kg) 1.00
Length (mm) 320.00
Width (mm) 250.00
Height (mm) 250.00

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Specification & Description

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Specification & Description

Specification Description
Part Number 3SB3921-0AA
Alternative Part Number 3SB39210AA
Manufacturer Siemens
Product Type Sealing Plug
Colour Black
Compatibility For Unused Round Command Points
Included Components Complete with Locknut
Status Phased-out Product
Successor SIRIUS ACT 3SU1
Preferred Successor Type >>3SU1900-0FA10-0AA0 + 3SU1500-0AA10-0AA0<<
Commodity Code 85389099

The Siemens 3SB3921-0AA is a high-quality sealing plug designed for securing unused round command points in industrial control systems. This robust component, complete with a locknut, ensures a secure and dust-tight seal, maintaining the integrity of your control panel. Its sleek black design integrates seamlessly into existing setups, making it an ideal choice for professionals seeking a reliable solution to cover redundant control points. As a phased-out product, the 3SB3921-0AA represents a legacy solution that continues to offer reliability and performance in a wide range of applications.

Commonly Asked Questions

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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What payment methods do you accept?

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.

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Is Marvo a credible parts supplier?

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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Have steps been taken to ensure quality control?

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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How do I create an account?

Creating an account is incredibly simple and takes a matter of seconds. You can create a Marvo account at any time by clicking here and following the simple steps on screen. By creating a Marvo account you can store your contact details, delivery addresses, billing addresses and more, meaning that you can enjoy game-changing convenience faster than ever before.

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Peace of mind with every purchase

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Our service to you

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Lightning-Fast Express Shipping: Receive your order in record time with our express shipping options, ensuring you minimize downtime and keep your projects on track.

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No-Risk Returns, Guaranteed: Return your parts anytime for a full refund. Our hassle-free return policy ensures you’re never stuck with something you don’t need.

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Rock-Solid Reliability at a Fraction of the Cost: Get pre-owned electronic parts that are fully tested for peak performance, saving you money without compromising on quality, backed by a comprehensive warranty.

Frequently Asked Questions

What is the purpose of this sealing plug?

The sealing plug is designed to fill unused round command points in control panels or machinery to prevent dust, debris, and moisture from entering and potentially causing damage or contamination.

Can this plug be used outdoors?

While the plug provides a degree of protection against environmental factors, it's best to check the specific environmental ratings and approvals to ensure suitability for outdoor use.

Is this plug easy to install?

Yes, the plug is designed for easy installation. It comes complete with a locknut to secure it in place, ensuring a snug and secure fit.

What colour is the plug?

The plug is black, which offers a neutral appearance that can blend in with various control panel designs.

Is this plug a permanent solution for sealing command points?

The plug can be used as a permanent or temporary solution, depending on your needs. It's designed to be durable and secure, but can also be removed if the command point is needed in the future.

What size command points does this plug fit?

This plug is designed to fit round command points that are standard in the industry, but it's always recommended to check the specific dimensions to ensure compatibility with your equipment.

Is the material of the plug resistant to chemicals?

The plug is made from materials that are generally resistant to a variety of chemicals, but for specific chemical resistance information, please refer to the material specifications.

How do I know if this plug is compatible with my equipment?

You should compare the dimensions and design of the plug with the requirements of your equipment. The plug is a standard component for Siemens control points, which are commonly used in the industry.

What should I do if I need a larger quantity of plugs?

For larger quantities, it's best to contact the supplier directly to discuss bulk ordering options and availability.

Has this product been phased out?

Yes, the 3SB3921-0AA is a phased-out product. However, there are successor products available that can be used as replacements. It's advisable to look into the recommended successor types for an updated solution.

Part condition box

Part conditions explained


We want your buying experience to be as seamless as possible. So, here are all of the product descriptions you will see when browsing Marvo, explained a little further:

New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.

New sealed: The product is sealed in its original packaging. It has never been opened or used, ensuring that it's in an untouched state.

New unboxed: The product does not come in its original packaging, but it has never been used and is in great working condition.

Refurbished: The product has been previously used, but it has undergone a thorough refurbishment process to restore it to a like-new or functional condition. Any defects or issues have been addressed, making it suitable for reuse.

Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.