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
3RH2921-1DA20
Siemens 3RH2921-1DA20 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 3RH2921-1DA20 is a high-quality lateral auxiliary switch block designed for use with motor contactors, specifically the SIRIUS series. This component features two normally open (NO) contacts, making it ideal for applications requiring reliable auxiliary switching. The switch block is engineered to operate efficiently within a wide ambient temperature range of -25°C to +60°C, ensuring robust performance in various industrial environments.
With a protection class of IP20, the 3RH2921-1DA20 offers a solid level of protection against dust and other small particles. It is built to endure up to 10 million mechanical operating cycles and 200,000 electrical operating cycles at AC-15, 230V, highlighting its durability and long service life. The switch block also boasts a high insulation voltage of 690V and an impulse voltage resistance of 6kV, providing excellent electrical insulation and surge protection.
The Siemens 3RH2921-1DA20 is designed for easy installation with snap-on mounting and screw-type terminals, accommodating various conductor cross-sections. This auxiliary switch block is suitable for use in contactor relays and power contactors, making it a versatile addition to your industrial control systems. Its reliable contact performance, with a fault rate of just one incorrect switching operation per 100 million operations, ensures dependable operation in critical applications.
With a protection class of IP20, the 3RH2921-1DA20 offers a solid level of protection against dust and other small particles. It is built to endure up to 10 million mechanical operating cycles and 200,000 electrical operating cycles at AC-15, 230V, highlighting its durability and long service life. The switch block also boasts a high insulation voltage of 690V and an impulse voltage resistance of 6kV, providing excellent electrical insulation and surge protection.
The Siemens 3RH2921-1DA20 is designed for easy installation with snap-on mounting and screw-type terminals, accommodating various conductor cross-sections. This auxiliary switch block is suitable for use in contactor relays and power contactors, making it a versatile addition to your industrial control systems. Its reliable contact performance, with a fault rate of just one incorrect switching operation per 100 million operations, ensures dependable operation in critical applications.
| Specification | Description |
|---|---|
| Part Number | 3RH2921-1DA20 |
| Manufacturer | Siemens |
| Product Brand Name | SIRIUS |
| Type | Lateral Auxiliary Switch Block |
| Application | Contactor relay and power contactor |
| Protection Class (IP) | IP20 |
| Ambient Temperature (Storage) | -55°C to +80°C |
| Ambient Temperature (Operating) | -25°C to +60°C |
| Mechanical Operating Cycles | 10,000,000 |
| Electrical Operating Cycles (AC-15, 230V) | 200,000 |
| Contact Reliability | 1 incorrect switching operation per 100 million (17 V, 1 mA) |
| Insulation Voltage | 690 V |
| Impulse Voltage Resistance | 6 kV |
| Mounting Type | Snap-on mounting |
| Width | 10 mm |
| Height | 57.4 mm |
| Depth | 66 mm |
| Electrical Connection Design | Screw-type terminals |
| Connectable Conductor Cross-Section (Solid) | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Connectable Conductor Cross-Section (Stranded with End Processing) | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Connectable Conductor Cross-Section (AWG) | 2x (20 ... 16), 2x (18 ... 14) |
| Product Function (Mirror Contact) | Yes (with 3RT2) |
| Product Function (Positively Driven Operation) | No |
| Country of Origin | - |
The Siemens 3RH2921-1DA20 is a high-quality lateral auxiliary switch block designed for use with contactor relays and power contactors. Part of the SIRIUS range, it offers robust performance with a protection class of IP20, making it suitable for various industrial applications. This auxiliary switch block is engineered to operate efficiently within a wide ambient temperature range and boasts an impressive mechanical lifespan of 10 million operating cycles. Its compact design, featuring snap-on mounting and screw-type terminals, ensures easy installation and reliable connectivity. With a rated insulation voltage of 690 V and an impulse voltage resistance of 6 kV, the 3RH2921-1DA20 is built to handle demanding electrical environments.
What is the primary function of this part?
This part is a lateral auxiliary switch block designed for use with motor contactors. It provides additional auxiliary contacts for control and signaling purposes.
What type of contacts does this auxiliary switch block have?
The auxiliary switch block features two normally open (NO) contacts.
What is the protection class of this auxiliary switch block?
The protection class on the front of the auxiliary switch block is IP20.
What is the typical mechanical service life of this part?
The typical mechanical service life of this auxiliary switch block is 10 million switching cycles.
What is the rated insulation voltage for this auxiliary switch block?
The rated insulation voltage for this auxiliary switch block is 690 V with a degree of pollution 3.
What is the ambient operating temperature range for this part?
The ambient operating temperature range for this auxiliary switch block is from -25°C to +60°C.
What type of mounting does this auxiliary switch block use?
This auxiliary switch block uses snap-on mounting.
What are the dimensions of this auxiliary switch block?
The dimensions of this auxiliary switch block are 10 mm in width, 57.4 mm in height, and 66 mm in depth.
What is the rated operational current for the auxiliary contacts at AC-15 at 230 V?
The rated operational current for the auxiliary contacts at AC-15 at 230 V is 6 A.
What is the impulse voltage resistance of this auxiliary switch block?
The impulse voltage resistance of this auxiliary switch block is rated at 6 kV.
- Integration into motor control circuits for enhanced operational control
- Use in industrial automation systems for reliable auxiliary switching
- Application in contactor relay systems to provide additional contact points
- Implementation in power contactor assemblies for improved circuit management
- Utilization in machinery and equipment requiring frequent switching operations
- Deployment in electrical panels for auxiliary contact expansion
- Suitable for environments requiring high mechanical and electrical endurance
- Ideal for use in control cabinets to extend the functionality of existing contactors
- Commonly used in manufacturing plants for process control and automation
- Employed in HVAC systems for auxiliary control and monitoring functions
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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