The Siemens Auxiliary Contact Block 3RH1921-1EA11 is a high-quality industrial accessory designed to expand the functionality of Siemens SIRIUS contactors in frame sizes S6 to S12. Engineered for industrial automation, motor control, and electrical switching applications, this 2-pole first laterally mountable auxiliary contact block provides additional switching contacts for monitoring, signaling, interlocking, and control circuit functions.
Available at SB Smart (sbsmart.in), the 3RH1921-1EA11 Auxiliary Contact Block integrates seamlessly with Siemens SIRIUS contactors, enabling engineers, panel builders, and maintenance professionals to enhance system functionality without increasing panel space requirements. Its compact side-mounted design allows for easy installation while maintaining the reliability, durability, and performance expected from Siemens industrial automation products.
The Siemens 3RH1921-1EA11 features a 1NO + 1NC contact configuration, making it a versatile solution for a wide range of industrial control applications. Whether used for status indication, PLC feedback, safety interlocking, or process monitoring, this auxiliary contact block provides dependable switching performance and long operational life.
Modern industrial systems require additional control contacts to support increasingly sophisticated automation functions. The 3RH1921-1EA11 allows users to expand the auxiliary contact capacity of Siemens power contactors while maintaining a compact and efficient control panel layout.
Its first lateral mounting position ensures quick and secure installation directly onto compatible S6–S12 Siemens contactors. The combination of 1 Normally Open (NO) and 1 Normally Closed (NC) contact provides maximum flexibility for control logic, signaling, feedback, and safety applications.
Built according to Siemens' strict quality standards, the 3RH1921-1EA11 Auxiliary Contact Block delivers reliable performance even in demanding industrial environments where continuous operation and system reliability are essential.
The Siemens 3RH1921-1EA11 provides extra contact points that can be utilized for:
The 1NO + 1NC configuration offers greater flexibility than single-contact arrangements, making it suitable for a wide variety of industrial automation and motor control applications.
The Siemens 3RH1921-1EA11 Auxiliary Contact Block is widely used in:
Its dependable operation and seamless compatibility with Siemens SIRIUS contactors make it a valuable component in modern industrial control systems.
At SB Smart (sbsmart.in), we provide genuine Siemens industrial automation and electrical products sourced through trusted and authorized supply channels. The 3RH1921-1EA11 Auxiliary Contact Block offers an efficient solution for expanding contactor functionality while maintaining Siemens-quality reliability and performance.
Whether you are designing a new automation panel, upgrading existing control equipment, or enhancing monitoring and signaling capabilities, the Siemens 3RH1921-1EA11 delivers the durability, flexibility, and operational reliability required for industrial applications.
| Specification | Details |
|---|---|
| Product Name | Auxiliary Contact Block |
| Manufacturer | Siemens |
| Series | SIRIUS |
| Order Code | 3RH1921-1EA11 |
| Product Type | Auxiliary Contact Block |
| Contact Configuration | 1NO + 1NC |
| Number of Poles | 2 Pole |
| Mounting Position | First Laterally Mountable |
| Compatible Contactor Sizes | S6 to S12 |
| Terminal Type | Screw Terminals |
| Mounting Method | Side Mount |
| Electrical Function | Signaling, 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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