Image shown may not reflect the final product

Siemens 3RH1921-1EA11

Name: 3RH1921-1EA11
Brand: Siemens
SKU: 3RH1921-1EA11
Price: 21.62 GBP
Availability: InStock

Wrong part? Click here

£21.62 (ex. VAT)

1 ready to ship

Don't want it used? Get it NEW

Image shown may not reflect the final product

Marvo Stock ID MV-1L70

HS Code 85365080

SKU 3RH1921-1EA11

Condition Used

Warranty 12 months

Weight (kg) 1.00

Length (mm) 320.00

Width (mm) 250.00

Height (mm) 250.00

EAN 4011209293526

Express delivery

Lightning fast delivery if ordered within 00:00:00

Need it urgently?

Call: +44 20 4570 3439

Quoting Marvo Stock ID: MV-1L70

Select condition

Don't want it used? Get it NEW

Returns Hassle-free returns

Thumbs up No hidden fees or duties

Shipping Swift dispatch and delivery

Similar Products

6SE6020-1BF00

£1,315.57 (ex. VAT)

S56ES54824UA20

£506.94 (ex. VAT)

More about this product

Specification & Description

View now

Commonly Asked Questions

View now

Customer Reviews

View now

Specification & Description

Specification	Description
Part Number	3RH1921-1EA11
Alternative Part Number	3RH19211EA11
Manufacturer	Siemens
Product Type	Auxiliary Switch Block
Contact Configuration	1 Normally Open (NO) / 1 Normally Closed (NC)
Rated Voltage	440 V
Insulation Voltage	500 V with degree of pollution 3
Surge Voltage Resistance	6 kV rated value
Ambient Operating Temperature Range	-25 ... +60 °C during operation, -55 ... +80 °C during storage
Mechanical Service Life	Typical 10,000,000 switching cycles
Electrical Endurance	200,000 switching cycles at AC-15, 230 V typical
Contact Reliability	1 faulty switching per 100 million (17 V, 1 mA)
Mounting Type	Snap-on mounting
Dimensions (W x H x D)	10 mm x 80 mm x 71 mm
Connection Type	Screw-type terminals
Conductor Cross-section	For auxiliary contacts: 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) solid or finely stranded
Protection Class	IP20 on the front
Compliance	Mirror contact acc. to IEC 60947-4-1, positively driven operation acc. to IEC 60947-5-1 (No)
Application	Suitable for use with contactor relays and power contactors

The Siemens 3RH1921-1EA11 is a high-quality auxiliary switch block designed to complement contactor setups in a variety of industrial applications. This switch block features a single normally open (NO) and a single normally closed (NC) contact, making it a versatile choice for enhancing control circuit flexibility. Engineered for lateral mounting, it seamlessly integrates with size S0 to S12 contactors, particularly those within the 3RT1 range.

Constructed to meet the rigorous standards of the SIRIUS product line, the 3RH1921-1EA11 boasts an IP20 protection class on the front, ensuring it is safeguarded against solid objects larger than 12.5mm. Its robust design allows it to operate reliably within an ambient temperature range of -25 to +60 degrees Celsius, and it maintains performance during storage in temperatures from -55 to +80 degrees Celsius.

The switch block is notable for its mechanical service life, offering approximately 10 million switching cycles, and an electrical endurance of 200,000 cycles at AC-15 at 230V, which speaks to its durability and longevity in demanding environments. The contact reliability is exceptional, with a very low chance of incorrect switching operations, ensuring consistent performance.

Installation is straightforward with its snap-on mounting design, and it has a compact footprint with dimensions of 10mm in width, 80mm in height, and 71mm in depth. The screw-type terminals provide a secure and reliable electrical connection, accommodating a range of conductor cross-sections for auxiliary contacts.

The 3RH1921-1EA11 is equipped with safety-related features such as a mirror contact according to IEC 60947-4-1, although it does not support positively driven operation according to IEC 60947-5-1. This auxiliary switch block is a testament to Siemens' commitment to quality, reliability, and innovation in industrial control components.

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.

Peace of mind with every purchase

Anna

‘I can recommend quick, efficient, and professional.’

Dan

‘The ordering was fast and efficient, and everything arrived just as they said it would.’

Blažej Knežo

‘Quick response and fast delivery of the product.’

Andreas Boehm

‘Excellent service. The right gear and the right price,well packed and delivered on time.’

Milan Kosík

‘Large selection of spare parts, fast delivery.’

Irene

‘Fast delivery and prompt action.’

Dan

‘The ordering was fast and efficient, and everything arrived just as they said it would.’

Andreas Boehm

‘Excellent service. The right gear and the right price,well packed and delivered on time.’

Nathalie Jolicoeur

‘Great service. Thank you.’

Muswalin

‘Good packing, quickly delivery and responsible.’

Thomas Roland Geaughan

‘Prompt and expert service. Ease of access to find the parts I needed.’

Nathalie Jolicoeur

‘Great service. Thank you.’

Ms. Mia

‘Quick response, good item, delivery on schedule.’

Learn more about Marvo

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 function of this auxiliary switch block?

The auxiliary switch block is designed to provide additional switching functions for contactor relays and power contactors. It features one normally open (NO) and one normally closed (NC) contact, which can be used for various control and signalling functions in electrical circuits.

Can this auxiliary switch block be used with any contactor?

This auxiliary switch block is specifically designed for use with Siemens 3RT1 contactors. It may not be compatible with contactors from other manufacturers or different series.

What is the voltage rating for this auxiliary switch block?

The auxiliary switch block is rated for use at up to 440 V.

What are the ambient temperature limits for operating this auxiliary switch block?

The auxiliary switch block can operate within an ambient temperature range of -25 to +60 °C during operation, and it can be stored in temperatures ranging from -55 to +80 °C.

What is the mechanical service life of this auxiliary switch block?

The mechanical service life of the auxiliary switch block is typically around 10 million switching cycles.

What type of terminals does this auxiliary switch block have for connection?

The auxiliary switch block comes with screw-type terminals for secure and reliable electrical connections.

Does this auxiliary switch block have a mirror contact function?

Yes, the auxiliary switch block has a mirror contact function according to IEC 60947-4-1 when used with 3RT1 contactors.

What is the insulation voltage rating for this auxiliary switch block?

The insulation voltage rating for the auxiliary switch block, with a degree of pollution 3, is 500 V AC.

What is the surge voltage resistance of this auxiliary switch block?

The surge voltage resistance of the auxiliary switch block is rated at 6 kV.

How is this auxiliary switch block mounted?

The auxiliary switch block is designed for snap-on mounting, making it easy to install alongside compatible contactors.

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.

The Smart Part

Factories implementing AI-driven systems, highlighting the benefits of investing in artificial intelligence.## Should You Be Investing in Artificial Intelligence?

Should you be investing in artificial intelligence?

Marvo

Just a few years back, investing in AI only existed in the realm of science fiction. It was a futuristic technology that could be found solely in books or in Hollywood films. Fast forward to todays world and AI is rapidly becoming an integral part of our daily lives. It is reshaping how we work, communicate and solve complex problems.

4 min read

December 13, 2024

The top 10 ways to improve your supply chain strategy

10 advanced techniques to improve your supply chain strategy

Marvo

A robust supply chain strategy is crucial in today’s interconnected and rapidly evolving global economy. Problems that businesses face include shifting consumer preferences, interruptions in supply, and an increasing focus on sustainability. This article delves into ten cutting-edge methods, in order to keep supply chain tactics robust, efficient, and competitive.

7 min read

November 22, 2024

What is supply chain optimisation?

Marvo

Supply chain optimisation is the key to navigating today's rapidly evolving manufacturing landscape. By improving their operations and logistics, businesses can reach greater levels of efficiency. This refinement also leads to strategic agility. As a result, companies position themselves to adapt to new challenges and seize opportunities.

6 min read

November 1, 2024

See all articles