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
| Specification | Description |
|---|---|
| Part Number | 3RH1921-1CD01 |
| Alternative Part Number | 3RH19211CD01 |
| Manufacturer | Siemens |
| Product Type | Auxiliary Switch Block |
| Number of Contacts | 1 Normally Closed (NC), Delayed |
| Connection Type | Screw Connection |
| Suitable Applications | For Motor Contactors, 1-Pole |
| Mounting Type | Snap-on Mounting |
| Width | 10 mm |
| Height | 38 mm |
| Depth | 51 mm |
| Insulation Voltage | Rated at 690 V with degree of pollution 3 |
| Impulse Voltage Resistance | Rated at 6 kV |
| Ambient Operating Temperature Range | -25 to +60 °C during operation, -55 to +80 °C during storage |
| Mechanical Operating Cycles | Typically 10,000,000 |
| Electrical Operating Cycles | Typically 200,000 at AC-15, at 230 V |
| Contact Reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Protection Class | IP20 on the front |
| Auxiliary Circuit Current Ratings | Varies with voltage level, up to 10 A at 24 V for AC-12, and 6 A at 24 V for DC-13 |
| Product Approvals | General Product Approval, Functional Safety/Safety of Machinery, KC Type Examination Certificate |
The Siemens 3RH1921-1CD01 is a high-quality auxiliary switch block designed to enhance the functionality of motor contactors. This component is part of the esteemed SIRIUS product line, known for its reliability and versatility in various industrial applications. The switch block features a single normally closed (NC) contact, configured according to the DIN EN50005 standard, and is equipped with a screw connection for secure and straightforward installation.
Engineered to operate within a broad ambient temperature range, the 3RH1921-1CD01 can withstand conditions from -25°C to +60°C during operation, ensuring consistent performance even in demanding environments. Its mechanical service life is impressive, with up to 10 million operating cycles, and it offers an electrical endurance of 200,000 cycles at AC-15 at 230V, highlighting its durability and long-term reliability.
The auxiliary switch block boasts an insulation voltage rated at 690V with a degree of pollution 3, and a surge voltage resistance of 6kV, providing robust protection against electrical disturbances. The compact design, featuring snap-on mounting, allows for easy integration into existing setups, with dimensions of 10mm in width, 38mm in height, and 51mm in depth.
This component is particularly suitable for use with contactor relays and power contactors, enhancing their switching capabilities and contributing to the overall safety and efficiency of the electrical control system. The 3RH1921-1CD01 is a testament to Siemens' commitment to quality and innovation, offering a dependable solution for industrial control applications.
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
Blažej Knežo
‘Quick response and fast delivery of the product.’
Kayden
‘Services is great.’
Irene
‘Fast delivery and prompt action.’
Nathalie Jolicoeur
‘Great service. Thank you.’
Advance Lifts
‘Great customer service , we needed some assistance quickly and received it.’
Ms. Mia
‘Quick response, good item, delivery on schedule.’
Thomas Roland Geaughan
‘Prompt and expert service. Ease of access to find the parts I needed.’
Martin Juřica
‘Fast offer, short delivery time.’
Advance Lifts
‘Great customer service , we needed some assistance quickly and received it.’
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 function of this auxiliary switch block?
The auxiliary switch block is designed to provide an additional NC (normally closed) contact for motor contactors, enhancing control and feedback within a circuit.
Can this auxiliary switch block be used with any contactor?
It is specifically designed for use with Siemens 3RT1 contactors, ensuring compatibility and reliable operation.
What are the mounting requirements for this auxiliary switch block?
This auxiliary switch block is designed for snap-on mounting, which allows for quick and easy installation onto compatible contactors.
What is the protection class of this auxiliary switch block?
The protection class for the front of the auxiliary switch block is IP20, indicating a basic level of protection against solid objects.
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, and can be stored in temperatures ranging from -55 to +80 degrees Celsius.
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, indicating its durability and longevity.
What is the electrical endurance of the auxiliary switch block?
The electrical endurance of the auxiliary switch block is typically 200,000 switching cycles at AC-15 at 230V.
How reliable are the contacts within this auxiliary switch block?
The contacts within the auxiliary switch block are highly reliable, with a contact reliability of 1 faulty switching per 100 million operations at 17V, 1 mA.
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 690V.
What type of electrical connection does this auxiliary switch block support?
The auxiliary switch block supports screw-type terminals for electrical connections, accommodating various conductor cross-sections for auxiliary contacts.
