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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RH1921-1FA31 |
| Alternative Part Number | 3RH19211FA31 |
| Manufacturer | Siemens |
| Part Description | Siemens Auxiliary Contact Block 1NO/1NC 440 V |
| Short Description | Attachable block, 4-pole |
| Country of Origin | Not specified |
| Commodity Code | 319211 |
| Use | This part is suitable for use with auxiliary and power contactors |
| IP Rating | IP20 on the front side |
| Operating Temperature | -25 to +60 degrees Celsius |
| Storage Temperature | -55 to +80 degrees Celsius |
| Mechanical Life | Typically 10,000,000 switching cycles |
| Electrical Life | Typically 200,000 switching cycles at AC-15 at 230V |
| Contact Reliability | One malfunction per 100 million (17V, 5mA) |
| Auxiliary Contact Reliability | One malfunction per 100 million (17V, 1mA) |
| Insulation Voltage | 690V at pollution degree 3 |
| Shock Voltage Resistance | 6kV rated value |
| Auxiliary Circuit | 1 normally open (NO) contact and 1 normally closed (NC) contact |
The Siemens 3RH1921-1FA31 is a robust and reliable auxiliary contact block, designed to enhance the functionality of your contactor relays and power contactors. This 4-pole attachable block features 3 Normally Open (NO) and 1 Normally Closed (NC) contacts, conforming to EN 50005 standards. With an insulation voltage of 690V and a surge voltage resistance of 6kV, it ensures safe and efficient operation in various industrial environments. The part is designed to withstand ambient temperatures ranging from -25°C to +60°C during operation and -55°C to +80°C during storage. It boasts a mechanical service life of 10 million switching cycles and an electrical endurance of 200,000 switching cycles at AC-15 at 230V. The Siemens 3RH1921-1FA31 auxiliary contact block is a testament to Siemens' commitment to quality, offering exceptional contact reliability with only one incorrect switching operation of 100 million. Enhance your control systems with this high-performance auxiliary contact 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.
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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.
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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 purpose of this Siemens Auxiliary Contact Block?
The Siemens Auxiliary Contact Block 3RH1921-1FA31 is designed to be used with contactor relays and power contactors. It's a crucial component in many industrial control systems, helping to ensure safe and efficient operation.
What are the technical specifications of this Auxiliary Contact Block?
This 4-pole attachable block has 3 Normally Open (NO) and 1 Normally Closed (NC) contacts. It has an insulation voltage of 690V and a surge voltage resistance of 6kV. It can operate in temperatures ranging from -25 to +60 degrees Celsius and can be stored in temperatures from -55 to +80 degrees Celsius.
What is the mechanical service life of this part?
The Siemens Auxiliary Contact Block 3RH1921-1FA31 has a mechanical service life of approximately 10 million switching cycles, making it a durable and reliable choice for your industrial control systems.
What is the electrical endurance of this Auxiliary Contact Block?
At AC-15 at 230V, the electrical endurance of the Siemens Auxiliary Contact Block 3RH1921-1FA31 is typically around 200,000 switching cycles.
What is the protection class of this part?
The Siemens Auxiliary Contact Block 3RH1921-1FA31 has a protection class IP20 on the front. This means it's protected against solid objects larger than 12.5mm but is not protected against liquids.
What is the contact reliability of this Auxiliary Contact Block?
The contact reliability of the Siemens Auxiliary Contact Block 3RH1921-1FA31 is one incorrect switching operation of 100 million switching operations (17 V, 5 mA). The contact reliability of auxiliary contacts is 1 faulty switching per 100 million (17 V, 1 mA).
Part conditions explained
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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.
