The Siemens Auxiliary Contact Block 3RH1921-1EA02 is a premium industrial accessory designed to enhance 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 contact points that support monitoring, signaling, safety interlocking, and control circuit operations.
Available at SB Smart (sbsmart.in), the 3RH1921-1EA02 Auxiliary Contact Block integrates seamlessly with Siemens SIRIUS power contactors, allowing engineers and panel builders to expand system capabilities without increasing panel footprint. Its compact side-mounted design ensures efficient installation while maintaining the reliability and durability expected from Siemens industrial products.
The Siemens 3RH1921-1EA02 features a 2NC (2 Normally Closed) contact configuration, making it particularly suitable for safety circuits, fault indication systems, interlocking functions, and control applications that require normally closed contact operation. Whether installed in industrial control panels, manufacturing facilities, automation systems, or power distribution equipment, this auxiliary contact block delivers dependable performance and long operational life.
Modern industrial systems often require additional auxiliary contacts for advanced control and monitoring functions. The 3RH1921-1EA02 provides a practical solution for expanding the auxiliary contact capacity of Siemens contactors while maintaining a compact control panel design.
Its first lateral mounting position allows quick and secure installation directly onto compatible Siemens S6–S12 contactors. The 2NC contact arrangement provides additional flexibility for safety interlocks, fault monitoring, emergency stop circuits, and process control applications.
Manufactured according to Siemens' stringent quality standards, the 3RH1921-1EA02 Auxiliary Contact Block ensures reliable switching performance even in demanding industrial environments where operational continuity is critical.
The Siemens 3RH1921-1EA02 provides additional auxiliary contacts that can be utilized for:
The 2NC configuration is particularly useful for applications requiring fail-safe operation and continuous monitoring of equipment status.
The Siemens 3RH1921-1EA02 Auxiliary Contact Block is widely used in:
Its robust 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 provide genuine Siemens industrial automation and electrical products sourced through authorized supply channels. The 3RH1921-1EA02 Auxiliary Contact Block offers a dependable solution for expanding contactor functionality while maintaining Siemens-quality reliability and performance.
Whether you are upgrading an existing control panel, designing a new automation system, or adding monitoring and safety functions to industrial equipment, the Siemens 3RH1921-1EA02 delivers the durability, flexibility, and operational reliability required for professional applications.
| Specification | Details |
|---|---|
| Product Name | Auxiliary Contact Block |
| Manufacturer | Siemens |
| Series | SIRIUS |
| Order Code | 3RH1921-1EA02 |
| Product Type | Auxiliary Contact Block |
| Contact Configuration | 2 NC |
| 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 | Safety, 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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