Image shown may not reflect the final product
View similar products
Express shipping
Lightning fast shipping if ordered within 00:00:00
Risk-Free Returns, Read Our Policy
Trusted by Global Manufacturers
No Delivery Duties or Additional Fees
Specification & Description
The Siemens 3RH2921-2DA20 is a high-quality auxiliary switch designed for lateral mounting, featuring two normally open (NO) contacts. This versatile component is part of the renowned SIRIUS series, known for its reliability and robust performance in industrial applications.
Engineered to complement contactor relays and power contactors, the 3RH2921-2DA20 ensures seamless integration and optimal functionality. It boasts an IP20 protection class on the front, making it suitable for various environments. The switch operates efficiently within a wide ambient temperature range, from -25°C to +60°C, and can be stored safely between -55°C and +80°C.
With a mechanical service life of up to 10 million switching cycles and an electrical endurance of approximately 200,000 cycles at AC-15 at 230V, this auxiliary switch is built to last. It also features a high surge voltage resistance of 6kV and an insulation voltage rated at 690V, ensuring dependable performance under demanding conditions.
The Siemens 3RH2921-2DA20 is equipped with spring-loaded terminals for secure and straightforward electrical connections. It supports finely stranded conductors with or without core end processing and accommodates AWG conductors ranging from 20 to 14.
Ideal for enhancing the functionality of your control systems, the Siemens 3RH2921-2DA20 auxiliary switch is a reliable choice for professionals seeking durability and efficiency in their industrial automation solutions.
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.
Read more...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.
Read more...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.
Read more...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.
Read more...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.
Read more...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.’
Thomas Roland Geaughan
‘Prompt and expert service. Ease of access to find the parts I needed.’
Martin Juřica
‘Fast offer, short delivery time.’
Kayden
‘Services is great.’
Advance Lifts
‘Great customer service , we needed some assistance quickly and received it.’
Julien
‘Perfect quick delivery, good service.’
Martin Juřica
‘Fast offer, short delivery time.’
Andreas Boehm
‘Excellent service. The right gear and the right price,well packed and delivered on time.’
Similar Products
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 primary function of this auxiliary switch?
The primary function of this auxiliary switch is to provide additional switching capabilities for contactor relays and power contactors.
What type of contacts does this auxiliary switch have?
This auxiliary switch features two normally open (NO) contacts.
What is the protection class of this auxiliary switch?
The protection class on the front of this auxiliary switch is IP20.
What is the typical mechanical service life of this auxiliary switch?
The typical mechanical service life of this auxiliary switch is 10 million switching cycles.
What is the rated insulation voltage for this auxiliary switch?
The rated insulation voltage for this auxiliary switch, with a degree of pollution 3, is 690 V.
What is the surge voltage resistance of this auxiliary switch?
The surge voltage resistance of this auxiliary switch is rated at 6 kV.
What are the ambient temperature ranges for storage and operation?
The ambient temperature range for storage is -55 to +80 °C, and for operation, it is -25 to +60 °C.
What type of terminals does this auxiliary switch use?
This auxiliary switch uses spring-loaded terminals for electrical connections.
What is the typical electrical endurance of this auxiliary switch at AC-15 at 230 V?
The typical electrical endurance of this auxiliary switch at AC-15 at 230 V is 200,000 switching cycles.
What is the operational current of the auxiliary contacts at AC-12 at 230 V?
The operational current of the auxiliary contacts at AC-12 at 230 V is 10 A.
