The Siemens Auxiliary Contact Block 3RH1921-1KA11 is a high-quality accessory designed to expand the functionality of Siemens SIRIUS contactors from frame sizes S6 to S12. Engineered for industrial automation and motor control applications, this 2-pole second laterally mountable auxiliary contact block provides additional switching contacts that enhance monitoring, signaling, interlocking, and control circuit operations.
Available at SB Smart (sbsmart.in), the 3RH1921-1KA11 Auxiliary Contact Block is specifically developed to integrate seamlessly with Siemens SIRIUS power contactors. Its compact side-mounted design allows easy installation while maximizing panel space utilization. By providing additional auxiliary contacts, this module helps engineers create more sophisticated control systems without requiring major modifications to existing equipment.
The Siemens 3RH1921-1KA11 is ideal for industries that require reliable status indication, automation control, safety interlocking, and process monitoring. Whether installed in manufacturing facilities, motor control centers, infrastructure projects, process plants, or OEM machinery, this auxiliary contact block delivers dependable performance and long operational life.
Modern industrial control systems often require multiple feedback and control signals. The 3RH1921-1KA11 enables users to expand the auxiliary contact capacity of Siemens contactors, allowing additional control functions to be integrated into automation systems.
Its second lateral mounting position provides installation flexibility while maintaining a compact panel layout. The auxiliary contacts can be used for:
By adding the Siemens 3RH1921-1KA11 Auxiliary Contact Block, system designers can improve operational visibility, increase control flexibility, and enhance overall automation performance.
The Siemens 3RH1921-1KA11 is widely used in industrial automation environments where additional control contacts are required. Its robust design ensures dependable operation even under demanding industrial conditions.
By extending the functionality of Siemens contactors, this auxiliary contact block helps engineers create more efficient and intelligent control systems while maintaining system reliability and operational safety.
The Siemens 3RH1921-1KA11 Auxiliary Contact Block is suitable for:
At SB Smart (sbsmart.in), we supply genuine Siemens industrial automation and electrical products sourced through authorized channels. The 3RH1921-1KA11 Auxiliary Contact Block offers a reliable and cost-effective solution for expanding the functionality of Siemens SIRIUS contactors.
Whether you are designing a new automation panel, upgrading existing equipment, or adding monitoring and control functions to a motor starter system, the Siemens 3RH1921-1KA11 provides the quality, reliability, and performance expected from Siemens industrial products.
| Specification | Details |
|---|---|
| Product Name | Auxiliary Contact Block |
| Manufacturer | Siemens |
| Series | SIRIUS |
| Order Code | 3RH1921-1KA11 |
| Product Type | Auxiliary Contact Block |
| Contact Configuration | 1 NO + 1 NC |
| Number of Poles | 2 Pole |
| Mounting Position | Second Laterally Mountable |
| Compatible Contactor Sizes | S6 to S12 |
| Terminal Type | Screw Terminals |
| Mounting Method | Side Mount |
| Mechanical Life | Long Service Life |
| Electrical Durability | Industrial Grade |
| Application | Signaling, Monitoring, Interlocking |
| Suitable For | Siemens SIRIUS Contactors |
| Industrial Use | Yes |
| Brand | Siemens |
| Condition | New & Genuine Product |
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