3RA2921-1B

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The Siemens 3RA2921-1B is a versatile link module designed for seamless integration with a range of Siemens circuit breakers and contactors. This module is particularly suited for applications requiring reliable screw terminal electrical connections. It is compatible with the S00 and S0 sizes of circuit breakers and S0 size contactors, ensuring a broad spectrum of use cases within industrial settings.

Crafted for DC operation, the 3RA2921-1B link module facilitates the mechanical and electrical linking of components such as the 3RV2.1/3RV2.2 and 3RT2.2, as well as the 3RW3 soft starters and 3RF34 solid-state contactors. Its design prioritises ease of installation with a screw fixing mounting type, making it a practical choice for various control panel configurations.

With dimensions of 45mm in width, 43mm in height, and 83mm in depth, the module maintains a compact footprint, allowing for efficient use of space within electrical enclosures. The product is part of the esteemed SIRIUS range, which is synonymous with high-quality industrial control gear, offering robust performance in demanding environments.

The 3RA2921-1B is engineered to meet the rigorous standards expected of industrial components, ensuring reliability and durability for your electrical control systems. Whether you're upgrading existing equipment or designing new installations, this link module is an essential component for achieving streamlined and secure electrical connections.
Specification Description
Part Number 3RA2921-1B
Alternative Part Number 3RA29211B
Manufacturer Siemens
Product Type Link Module
Design For screw terminal electrical and mechanical connections
Suitable For 3RV2.1/3RV2.2 and 3RT2.2 DC operation, 3RW3 soft starters, or 3RF34 solid-state contactors
Product Brand Name SIRIUS
Size of Circuit-Breaker S00, S0
Size of Contactor S0
Mounting Type Screw fixing
Width 45 mm
Height 43 mm
Depth 82.9 mm
Commodity Code 853690
General Product Approval Declaration of Conformity available
Special Features Multi-unit packaging
Installation Easy installation with screw fixing for secure and reliable connection
Usage Facilitates the connection between contactors and circuit breakers for streamlined integration

What is the purpose of this link module?

The link module is designed to facilitate the electrical and mechanical connection between Siemens SIRIUS contactors and circuit breakers, specifically for the 3RV2.1/3RV2.2 and 3RT2.2, as well as for DC operation with soft starters 3RW3 or solid-state contactors 3RF34.

Can this link module be used with AC contactors?

No, this link module is specifically designed for actuating voltage contactors with DC operation.

What are the dimensions of the link module?

The link module has a width of 45 mm, a height of 43 mm, and a depth of 83 mm.

How is the link module mounted?

The link module is mounted using screw fixing, which allows for a secure and stable installation.

What sizes of circuit breakers and contactors is the link module compatible with?

The link module is compatible with size S00 and S0 circuit breakers and size S0 contactors.

Are there any certifications or approvals for this link module?

Yes, the link module has general product approvals and declarations of conformity, which can be found in the product's documentation.

What is the design of the product?

The design of the product is focused on actuating voltage contactors for DC operation, ensuring compatibility with specific Siemens components.

Is this link module part of a multi-unit packaging?

Yes, the 3RA2921-1B is available as part of a multi-unit packaging, which may be beneficial for projects requiring multiple units.

What is the product brand name associated with this link module?

The link module is part of the SIRIUS product range from Siemens.

How can I find further technical information about the link module?

Further technical information can be obtained from the product's documentation, which includes detailed specifications and installation instructions.

  • Connecting circuit breakers to contactors in motor control systems
  • Facilitating quick and secure electrical connections in industrial automation panels
  • Enabling easy assembly and disassembly of control units for maintenance and troubleshooting
  • Integrating soft starters with motor circuits for smooth operation
  • Linking solid-state contactors for precise control in heating applications
  • Utilising in DC actuating voltage contactor setups for direct current applications
  • Implementing in modular control systems for flexibility and space-saving
  • Serving as an interface between different components in a control cabinet
  • Providing mechanical and electrical connection in multi-unit packaging systems
  • Assisting in retrofitting or upgrading existing control systems with minimal rewiring

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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