steve
Got hold of Sime for a Carrier card for…
Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
3 weeks ago
3RH1921-1EA11
Siemens 3RH1921-1EA11 available at EU Automation. Get in touch today for a quick price.
Based on over 4900 reviews
Full 12-month warranty
Available for dispatch immediately
We deliver worldwide
What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 3RH1921-1EA11 is a high-quality auxiliary switch block designed to complement contactor setups in a variety of industrial applications. This switch block features a single normally open (NO) and a single normally closed (NC) contact, making it a versatile choice for enhancing control circuit flexibility. Engineered for lateral mounting, it seamlessly integrates with size S0 to S12 contactors, particularly those within the 3RT1 range.
Constructed to meet the rigorous standards of the SIRIUS product line, the 3RH1921-1EA11 boasts an IP20 protection class on the front, ensuring it is safeguarded against solid objects larger than 12.5mm. Its robust design allows it to operate reliably within an ambient temperature range of -25 to +60 degrees Celsius, and it maintains performance during storage in temperatures from -55 to +80 degrees Celsius.
The switch block is notable for its mechanical service life, offering approximately 10 million switching cycles, and an electrical endurance of 200,000 cycles at AC-15 at 230V, which speaks to its durability and longevity in demanding environments. The contact reliability is exceptional, with a very low chance of incorrect switching operations, ensuring consistent performance.
Installation is straightforward with its snap-on mounting design, and it has a compact footprint with dimensions of 10mm in width, 80mm in height, and 71mm in depth. The screw-type terminals provide a secure and reliable electrical connection, accommodating a range of conductor cross-sections for auxiliary contacts.
The 3RH1921-1EA11 is equipped with safety-related features such as a mirror contact according to IEC 60947-4-1, although it does not support positively driven operation according to IEC 60947-5-1. This auxiliary switch block is a testament to Siemens' commitment to quality, reliability, and innovation in industrial control components.
Constructed to meet the rigorous standards of the SIRIUS product line, the 3RH1921-1EA11 boasts an IP20 protection class on the front, ensuring it is safeguarded against solid objects larger than 12.5mm. Its robust design allows it to operate reliably within an ambient temperature range of -25 to +60 degrees Celsius, and it maintains performance during storage in temperatures from -55 to +80 degrees Celsius.
The switch block is notable for its mechanical service life, offering approximately 10 million switching cycles, and an electrical endurance of 200,000 cycles at AC-15 at 230V, which speaks to its durability and longevity in demanding environments. The contact reliability is exceptional, with a very low chance of incorrect switching operations, ensuring consistent performance.
Installation is straightforward with its snap-on mounting design, and it has a compact footprint with dimensions of 10mm in width, 80mm in height, and 71mm in depth. The screw-type terminals provide a secure and reliable electrical connection, accommodating a range of conductor cross-sections for auxiliary contacts.
The 3RH1921-1EA11 is equipped with safety-related features such as a mirror contact according to IEC 60947-4-1, although it does not support positively driven operation according to IEC 60947-5-1. This auxiliary switch block is a testament to Siemens' commitment to quality, reliability, and innovation in industrial control components.
| Specification | Description |
|---|---|
| Part Number | 3RH1921-1EA11 |
| Alternative Part Number | 3RH19211EA11 |
| Manufacturer | Siemens |
| Product Type | Auxiliary Switch Block |
| Contact Configuration | 1 Normally Open (NO) / 1 Normally Closed (NC) |
| Rated Voltage | 440 V |
| Insulation Voltage | 500 V with degree of pollution 3 |
| Surge Voltage Resistance | 6 kV rated value |
| Ambient Operating Temperature Range | -25 ... +60 °C during operation, -55 ... +80 °C during storage |
| Mechanical Service Life | Typical 10,000,000 switching cycles |
| Electrical Endurance | 200,000 switching cycles at AC-15, 230 V typical |
| Contact Reliability | 1 faulty switching per 100 million (17 V, 1 mA) |
| Mounting Type | Snap-on mounting |
| Dimensions (W x H x D) | 10 mm x 80 mm x 71 mm |
| Connection Type | Screw-type terminals |
| Conductor Cross-section | For auxiliary contacts: 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) solid or finely stranded |
| Protection Class | IP20 on the front |
| Compliance | Mirror contact acc. to IEC 60947-4-1, positively driven operation acc. to IEC 60947-5-1 (No) |
| Application | Suitable for use with contactor relays and power contactors |
What is the function of this auxiliary switch block?
The auxiliary switch block is designed to provide additional switching functions for contactor relays and power contactors. It features one normally open (NO) and one normally closed (NC) contact, which can be used for various control and signalling functions in electrical circuits.
Can this auxiliary switch block be used with any contactor?
This auxiliary switch block is specifically designed for use with Siemens 3RT1 contactors. It may not be compatible with contactors from other manufacturers or different series.
What is the voltage rating for this auxiliary switch block?
The auxiliary switch block is rated for use at up to 440 V.
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 °C during operation, and it can be stored in temperatures ranging from -55 to +80 °C.
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.
What type of terminals does this auxiliary switch block have for connection?
The auxiliary switch block comes with screw-type terminals for secure and reliable electrical connections.
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.
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 500 V AC.
What is the surge voltage resistance of this auxiliary switch block?
The surge voltage resistance of the auxiliary switch block is rated at 6 kV.
How is this auxiliary switch block mounted?
The auxiliary switch block is designed for snap-on mounting, making it easy to install alongside compatible contactors.
- Integration into motor control circuits for auxiliary switching functions
- Use in control panels for adding auxiliary contacts to existing contactor setups
- Implementation in automation systems for signal switching and feedback
- Application in conveyor systems for start/stop operations
- Utilisation in HVAC systems for controlling various stages of operation
- Inclusion in pump control circuits for additional control or indication purposes
- Employment in manufacturing equipment for extending control circuit capabilities
- Installation in packaging machinery for precise control over machine sequences
- Adaptation in material handling systems for auxiliary command functions
- Incorporation in lighting control circuits as auxiliary contacts for complex operations
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
Delivery
- Logistic partners UPS, FedEx and DHL
- International delivery available
- Premium nine hour delivery service available to anywhere in Europe
- Same day dispatch from group stock
Warranty
All parts new or reconditioned are covered by EU Automation 12 month warranty
Returns
No hassle returns policy
Dedicated customer support team
Payment
Trade CreditWe understand that credit is a necessary part of business and offer credit agreements on request, subject to status.
Payment optionsWe accept Bank transfers and the following methods of payment:
All transactions are handled securely by HSBC and HSBC Merchant Services. For more information, please visit our dedicated payments page.
Services
Sourcing your part
Global supplier of quality automation and control components
Service Exchange
Dispose of your old unit by exchanging it for a working part.
Repair
A comprehensive repair service for faulty equipment.
Customer reviews
steve
Daniel
Excellent customer service...
Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
2 months ago
Jerry Schrink
Tom Higgins provided amazing service
Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
2 months ago
Paulo Pereira
Excellent service and communication…
Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
2 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
3 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
4 months ago
Our world, made possible by manufacturing. Manufacturing made possible by EU Automation.
Discover how we do our part to keep your production lines moving.