The Siemens Auxiliary Contact Block 3RH1921-1KA02 is a premium industrial accessory designed to extend the functionality of Siemens SIRIUS power contactors from frame sizes S6 to S12. Engineered for industrial automation, motor control, and electrical switching applications, this 2-pole second laterally mountable auxiliary contact block provides additional auxiliary contacts for advanced monitoring, interlocking, signaling, and control operations.
Available at SB Smart (sbsmart.in), the 3RH1921-1KA02 Auxiliary Contact Block is specifically developed to integrate seamlessly with Siemens SIRIUS contactors, ensuring reliable performance and easy installation. Its compact side-mounted design allows users to expand control functionality without increasing panel space requirements, making it an ideal solution for modern industrial control panels and automation systems.
The Siemens 3RH1921-1KA02 is particularly valuable in applications where additional feedback signals, safety interlocks, and status monitoring are required. By adding auxiliary contacts to existing contactor assemblies, engineers can create more sophisticated control systems while maintaining the reliability and performance expected from Siemens industrial products.
Industrial control systems often require additional auxiliary contacts to support automation logic, PLC integration, alarm systems, and operational monitoring. The 3RH1921-1KA02 provides a simple and effective way to expand the capabilities of Siemens contactors without requiring major system modifications.
Its second lateral mounting design ensures convenient installation on compatible S6 to S12 contactors while maintaining a compact footprint. Built to Siemens quality standards, this auxiliary contact block delivers dependable electrical performance and long service life in demanding industrial environments.
The 2 NC (Normally Closed) contact configuration makes this module particularly suitable for safety circuits, fault monitoring, interlocking systems, and control applications where normally closed signaling is required.
The Siemens 3RH1921-1KA02 helps increase the functionality of motor control and automation systems by providing additional contact points for:
By adding auxiliary contacts, system designers can improve operational visibility, enhance control flexibility, and optimize system performance.
The Siemens 3RH1921-1KA02 Auxiliary Contact Block is widely used in:
Its reliable design and seamless compatibility with Siemens contactors make it an essential accessory for industrial automation and motor control applications.
At SB Smart (sbsmart.in), we supply genuine Siemens industrial automation and electrical products sourced through authorized channels. The 3RH1921-1KA02 Auxiliary Contact Block offers a dependable solution for expanding contactor functionality while maintaining the quality and reliability associated with Siemens products.
Whether you are upgrading an existing control panel, designing a new automation system, or adding monitoring and safety functions to your equipment, the Siemens 3RH1921-1KA02 provides outstanding performance and long-term value.
| Specification | Details |
|---|---|
| Product Name | Auxiliary Contact Block |
| Manufacturer | Siemens |
| Series | SIRIUS |
| Order Code | 3RH1921-1KA02 |
| Product Type | Auxiliary Contact Block |
| Contact Configuration | 2 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 |
| Electrical Function | Monitoring & Interlocking |
| Suitable For | Siemens SIRIUS Contactors |
| Industrial Application | Yes |
| Mechanical Life | Long Service Life |
| Electrical Durability | Industrial Grade |
| Brand | Siemens |
| Condition | New & Genuine Product |
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