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Siemens 3RH1921-2CA10

Name: 3RH1921-2CA10
Brand: Siemens
SKU: 3RH1921-2CA10
Price: 21.3 GBP
Availability: InStock

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£21.30 (ex. VAT)

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Marvo Stock ID MV-2359

HS Code 85365080

SKU 3RH1921-2CA10

Condition Used

Warranty 12 months

Weight (kg) 0.02

Length (mm) 51.00

Width (mm) 10.00

Height (mm) 38.00

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Specification & Description

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Specification & Description

Specification	Description
Part Number	3RH1921-2CA10
Alternative Part Number	3RH19212CA10
Manufacturer	Siemens
Product Type	Auxiliary Switch Block
Suitable Applications	Contactor relay and power contactor
Number of Contacts	1 Normally Open (NO)
Rated Insulation Voltage	690 V
Impulse Voltage Resistance	6 kV
Ambient Operating Temperature Range	-25 °C to +60 °C during operation, -55 °C to +80 °C during storage
Mechanical Operating Cycles	Typically 10,000,000
Electrical Operating Cycles	Typically 200,000 at AC-15, 230 V
Contact Reliability	1 faulty switching per 100 million (17 V, 1 mA) for auxiliary contacts
Mounting Type	Snap-on mounting
Dimensions (W x H x D)	10 mm x 38 mm x 51 mm
Connection Type	Spring-loaded terminals
Connectable Conductor Cross-section	2x (0.5 ... 1.5 mm²) finely stranded with conductor end processing, 2x (0.5 ... 2.5 mm²) without
AWG Cable Compatibility	For auxiliary contacts: 2x (20 ... 14)
Product Function	Mirror contact according to IEC 60947-4-1 (with 3RT1)
Safety	Not positively driven according to IEC 60947-5-1
Commodity Code	85365080

The Siemens 3RH1921 Series Auxiliary Switch Block is a compact and reliable component designed for seamless integration with contactors used in motor switching applications. This auxiliary switch block features a single normally open (NO) contact, ensuring straightforward connectivity and functionality within your control systems. With a robust cage clamp connection, it offers a secure and maintenance-free electrical connection, enhancing the durability and longevity of the device.

Crafted to meet the DIN EN50005 standard, this switch block is engineered for precision and consistency in performance. The dimensions of 38 x 10 x 51 mm make it an ideal choice for installations where space is at a premium, without compromising on accessibility or ease of use.

The switch block operates efficiently within a wide ambient temperature range, from -25°C to +60°C, making it suitable for a variety of industrial environments. Its mechanical operating cycles are rated typically at 10,000,000, and it has an electrical operating cycle of 200,000 at AC-15, 230 V, which speaks to its resilience and reliability in demanding operational conditions.

With an insulation voltage rated at 690 V and an impulse voltage resistance of 6 kV, the Siemens 3RH1921 Series Auxiliary Switch Block is designed to withstand challenging electrical environments, ensuring safety and reliability in your electrical control systems. Its snap-on mounting design allows for quick and easy installation, making it a convenient addition to your equipment.

This auxiliary switch block is a testament to Siemens' commitment to quality and innovation, providing a dependable solution for enhancing the control and functionality of motor contactors. Whether you're upgrading existing systems or building new industrial controls, this auxiliary switch block is an excellent choice for ensuring efficient and reliable operations.

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.

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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 an auxiliary switch block?

An auxiliary switch block is used to provide additional switching functions in a control circuit. It can be used for signalling, interlocking, or controlling auxiliary circuits separate from the main circuit.

Can this auxiliary switch block be used with any contactor?

The Siemens 3RH1921-2CA10 is designed to be compatible with specific Siemens contactors, particularly those in the 3RT1 range. It's important to check the compatibility with your existing contactor before purchasing.

What type of connections does this auxiliary switch block support?

This auxiliary switch block supports cage clamp connections, which are a type of screwless terminal that uses a spring to clamp the conductor, making it easy to install and providing a secure connection.

What is the voltage rating for this auxiliary switch block?

The voltage rating for this auxiliary switch block is up to 690 V, making it suitable for a wide range of industrial applications.

What are the dimensions of this auxiliary switch block?

The dimensions of the Siemens 3RH1921-2CA10 are 38 mm in height, 10 mm in width, and 51 mm in depth.

How many mechanical operating cycles can this auxiliary switch block handle?

This auxiliary switch block is designed for a mechanical operating life of typically 10 million cycles, ensuring long-term reliability in your control systems.

What is the insulation voltage and impulse voltage resistance of this part?

The insulation voltage with a degree of pollution 3 is rated at 690 V, and it has an impulse voltage resistance rated value of 6 kV.

What is the ambient temperature range for operating this auxiliary switch block?

The ambient temperature range for operating the auxiliary switch block is between -25 °C and +60 °C, ensuring it can function in a variety of industrial environments.

How is this auxiliary switch block mounted?

The auxiliary switch block is designed for snap-on mounting, which allows for quick and easy installation onto compatible contactors.

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, which is important for safety applications.

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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