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Siemens 3RH1921-1MA11

Name: 3RH1921-1MA11
Brand: Siemens
SKU: 3RH1921-1MA11
Price: 21.76 GBP
Availability: InStock

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£21.76 (ex. VAT)

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Marvo Stock ID MV-4QQM

HS Code 853650

SKU 3RH1921-1MA11

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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Commonly Asked Questions

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Customer Reviews

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Specification & Description

Specification	Description
Part Number	3RH1921-1MA11
Alternative Part Number	3RH19211MA11
Manufacturer	Siemens
Product Type	Auxiliary Switch Block
Contact Configuration	1 Normally Open (NO) + 1 Normally Closed (NC)
Rated Insulation Voltage	690 V
Surge Voltage Resistance	Rated value 6 kV
Mechanical Service Life	Typical 10,000,000 switching cycles
Electrical Endurance	Typical 200,000 switching cycles at AC-15, 230 V
Contact Reliability	1 faulty switching per 100 million operations (17 V, 1 mA)
Ambient Operating Temperature Range	-25 ... +60 °C during operation
Storage Temperature Range	-55 ... +80 °C
Protection Class	IP20 on the front
Mounting Type	Snap-on mounting
Connection Type	Screw-type terminals
Suitable For Use With	Contactor relay and power contactor
Dimensions (Width x Height x Depth)	44 mm x 38 mm x 51 mm
Commodity Code	85365080

The Siemens 3RH1921-1MA11 is a high-quality auxiliary switch block designed to enhance the functionality of motor contactors. This switch block is equipped with one normally open (NO) and one normally closed (NC) contact, conforming to EN 50005 standards for a 2-pole connection with a screw terminal. It is suitable for a wide range of industrial applications where reliable switching is essential.

Crafted for durability and performance, the 3RH1921-1MA11 boasts an impressive mechanical service life of approximately 10 million switching cycles, and an electrical endurance of 200,000 cycles at AC-15 at 230V, which speaks to its robustness and longevity in demanding environments.

The switch block operates within an ambient temperature range of -25 to +60°C during operation, ensuring consistent performance even in varied temperature conditions. With an insulation voltage rated at 690V and a surge voltage resistance of 6kV, it provides a high level of electrical insulation and protection against voltage spikes.

Installation is straightforward thanks to its snap-on mounting design, and it features a compact footprint with dimensions of 44mm in width, 38mm in height, and 51mm in depth, allowing for efficient use of space within control cabinets.

The 3RH1921-1MA11 is a testament to Siemens' commitment to quality and reliability, making it an excellent choice for those seeking to maintain or enhance their motor control systems with a dependable auxiliary switch 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.

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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.

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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 voltage rating for this auxiliary switch block?

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

Can this auxiliary switch block be used with motor contactors?

Yes, this auxiliary switch block is designed for use with contactors for switching motors, providing reliable performance in controlling motor operations.

What type of terminals does this auxiliary switch block have?

The auxiliary switch block comes equipped with screw-type terminals, which offer a secure and reliable connection for auxiliary and control current circuits.

What is the IP protection class of this auxiliary switch block?

This auxiliary switch block has an IP20 protection class on the front, indicating that it is protected against solid objects larger than 12.5 mm but not against water.

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 degrees Celsius, ensuring functionality in various environmental conditions.

How many switching cycles can this auxiliary switch block handle?

The mechanical service life of the auxiliary switch block is typically around 10 million switching cycles, while its electrical endurance at AC-15 at 230 V is approximately 200,000 cycles.

What are the dimensions of this auxiliary switch block?

The dimensions of the auxiliary switch block are 44 mm in width, 38 mm in height, and 51 mm in depth, making it compact and easy to integrate into various setups.

Is the auxiliary switch block easy to install?

Yes, the auxiliary switch block features snap-on mounting, which simplifies the installation process and allows for quick and easy integration with existing systems.

Does this auxiliary switch block have mirror contact functionality?

The auxiliary switch block does include mirror contact functionality according to IEC 60947-4-1, when used with 3RT1 contactors, enhancing its safety features.

What is the contact reliability of the auxiliary switch block?

The auxiliary switch block boasts a high contact reliability, with only one faulty switching operation expected per 100 million operations at 17 V and 5 mA for the main contacts.

Part conditions explained

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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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