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 months ago
3RH1921-2FA04
Siemens 3RH1921-2FA04 available at EU Automation. Get in touch today for a quick price.
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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 3RH1921-2FA04 is a robust auxiliary switch block designed for integration with contactor relays and motor contactors. This component is part of the SIRIUS range, known for its reliability and efficiency in industrial applications. It features four normally closed (NC) contacts, providing dependable performance in controlling auxiliary circuits. The switch block is equipped with spring-loaded terminals, ensuring secure and straightforward connections. With a protection class of IP20, it is suitable for use in environments where basic protection against dust and touch is required. The 3RH1921-2FA04 is engineered to withstand a wide range of operating temperatures, from -25°C to +60°C, and offers a mechanical lifespan of up to 10 million switching cycles, making it a durable choice for long-term use. Its compact dimensions allow for easy installation in various setups, and it is compatible with a range of voltages, supporting both AC and DC operations. This auxiliary switch block is an ideal choice for enhancing the functionality and control of your electrical systems.
| Specification | Description |
|---|---|
| Part Number | 3RH1921-2FA04 |
| Manufacturer | Siemens |
| Product Family | SIRIUS |
| Type | Auxiliary Switch Block |
| Contacts | 4 Normally Closed (NC) |
| Mounting Type | Snap-on mounting |
| Protection Class | IP20 |
| Ambient Temperature | -25°C to +60°C during operation, -55°C to +80°C during storage |
| Mechanical Life | 10,000,000 switching cycles |
| Electrical Life | 200,000 switching cycles at AC-15, 230 V |
| Insulation Voltage | 690 V |
| Impulse Voltage | 6 kV |
| Dimensions | Width: 44 mm, Height: 38 mm, Depth: 51 mm |
| Connection Type | Spring-loaded terminals |
| Conductor Cross-section | 2x (0.5 ... 1.5 mm²) finely stranded with end processing, 2x (0.5 ... 2.5 mm²) without end processing, 2x (20 ... 14 AWG) for auxiliary contacts |
| Application | Suitable for use with contactor relays and power contactors |
The Siemens 3RH1921-2FA04 is a robust auxiliary switch block designed for seamless integration with contactor relays and power contactors. It features four normally closed contacts and is built to withstand demanding industrial environments. With a high mechanical and electrical life expectancy, this switch block ensures reliable performance over extended periods. Its snap-on mounting and spring-loaded terminals facilitate easy installation and secure connections. The unit is protected to IP20 standards, making it suitable for a variety of applications where durability and reliability are paramount.
What is the function of this auxiliary switch block?
This auxiliary switch block is designed to be used with contactor relays and motor contactors, providing additional switching capabilities with its 4 normally closed (NC) contacts.
What is the protection class of this auxiliary switch block?
The auxiliary switch block has a protection class of IP20 on the front, which means it is protected against solid objects over 12mm, such as fingers.
What are the ambient temperature ranges for operation and storage?
The ambient temperature range for operation is -25°C to +60°C, and for storage, it is -55°C 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 10 million switching cycles.
What is the electrical endurance of this auxiliary switch block at AC-15 at 230 V?
The electrical endurance at AC-15 at 230 V is typically 200,000 switching cycles.
What type of terminals does this auxiliary switch block use?
This auxiliary switch block uses spring-loaded terminals for the auxiliary and control current circuits.
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.
What is the rated insulation voltage of this auxiliary switch block?
The rated insulation voltage of the auxiliary switch block is 690 V with a degree of pollution 3.
What is the impulse voltage resistance of this auxiliary switch block?
The impulse voltage resistance of the auxiliary switch block is rated at 6 kV.
Is this auxiliary switch block suitable for use with power contactors?
Yes, this auxiliary switch block is suitable for use with both contactor relays and power contactors.
- Utilised in industrial automation systems for controlling auxiliary circuits.
- Commonly used in conjunction with contactor relays and motor contactors.
- Suitable for applications requiring reliable switching of auxiliary contacts.
- Employed in environments where space-saving and efficient design is crucial.
- Ideal for use in machinery and equipment that demands high mechanical and electrical endurance.
- Frequently integrated into control panels for managing auxiliary functions.
- Used in systems that require compliance with IEC standards for mirror contacts.
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.
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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.
5 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!
5 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!
5 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.
5 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!
6 months ago
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