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Siemens 3RH1921-1FA31

Name: 3RH1921-1FA31
Brand: Siemens
SKU: 3RH1921-1FA31
Price: 21.3 GBP
Availability: InStock

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£21.30 (ex. VAT)

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Marvo Stock ID MV-1XO1

HS Code 85365080

SKU 3RH1921-1FA31

Condition Used

Warranty 12 months

Weight (kg) 1.00

Length (mm) 60.00

Width (mm) 60.00

Height (mm) 70.00

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Specification & Description

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Specification & Description

Specification	Description
Part Number	3RH1921-1FA31
Alternative Part Number	3RH19211FA31
Manufacturer	Siemens
Part Description	Siemens Auxiliary Contact Block 1NO/1NC 440 V
Short Description	Attachable block, 4-pole
Country of Origin	Not specified
Commodity Code	319211
Use	This part is suitable for use with auxiliary and power contactors
IP Rating	IP20 on the front side
Operating Temperature	-25 to +60 degrees Celsius
Storage Temperature	-55 to +80 degrees Celsius
Mechanical Life	Typically 10,000,000 switching cycles
Electrical Life	Typically 200,000 switching cycles at AC-15 at 230V
Contact Reliability	One malfunction per 100 million (17V, 5mA)
Auxiliary Contact Reliability	One malfunction per 100 million (17V, 1mA)
Insulation Voltage	690V at pollution degree 3
Shock Voltage Resistance	6kV rated value
Auxiliary Circuit	1 normally open (NO) contact and 1 normally closed (NC) contact

The Siemens 3RH1921-1FA31 is a robust and reliable auxiliary contact block, designed to enhance the functionality of your contactor relays and power contactors. This 4-pole attachable block features 3 Normally Open (NO) and 1 Normally Closed (NC) contacts, conforming to EN 50005 standards. With an insulation voltage of 690V and a surge voltage resistance of 6kV, it ensures safe and efficient operation in various industrial environments. The part is designed to withstand ambient temperatures ranging from -25°C to +60°C during operation and -55°C to +80°C during storage. It boasts a mechanical service life of 10 million switching cycles and an electrical endurance of 200,000 switching cycles at AC-15 at 230V. The Siemens 3RH1921-1FA31 auxiliary contact block is a testament to Siemens' commitment to quality, offering exceptional contact reliability with only one incorrect switching operation of 100 million. Enhance your control systems with this high-performance auxiliary contact block.

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.

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.

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.

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.

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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Andreas Boehm

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Advance Lifts

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Our service to you

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.

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.

Clear Pricing with No Hidden Fees: What you see is what you pay, transparent pricing with no extra costs, ever. Rest assured, all taxes and fees are already included in your final price.

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 Siemens Auxiliary Contact Block?

The Siemens Auxiliary Contact Block 3RH1921-1FA31 is designed to be used with contactor relays and power contactors. It's a crucial component in many industrial control systems, helping to ensure safe and efficient operation.

What are the technical specifications of this Auxiliary Contact Block?

This 4-pole attachable block has 3 Normally Open (NO) and 1 Normally Closed (NC) contacts. It has an insulation voltage of 690V and a surge voltage resistance of 6kV. It can operate in temperatures ranging from -25 to +60 degrees Celsius and can be stored in temperatures from -55 to +80 degrees Celsius.

What is the mechanical service life of this part?

The Siemens Auxiliary Contact Block 3RH1921-1FA31 has a mechanical service life of approximately 10 million switching cycles, making it a durable and reliable choice for your industrial control systems.

What is the electrical endurance of this Auxiliary Contact Block?

At AC-15 at 230V, the electrical endurance of the Siemens Auxiliary Contact Block 3RH1921-1FA31 is typically around 200,000 switching cycles.

What is the protection class of this part?

The Siemens Auxiliary Contact Block 3RH1921-1FA31 has a protection class IP20 on the front. This means it's protected against solid objects larger than 12.5mm but is not protected against liquids.

What is the contact reliability of this Auxiliary Contact Block?

The contact reliability of the Siemens Auxiliary Contact Block 3RH1921-1FA31 is one incorrect switching operation of 100 million switching operations (17 V, 5 mA). The contact reliability of auxiliary contacts is 1 faulty switching per 100 million (17 V, 1 mA).

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.

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