# Siemens 3RH2122-4KB40 Auxiliary Relay Control Module Industrial Automation

The **Siemens 3RH2122-4KB40** is a high-performance auxiliary relay designed for robust industrial automation applications. This essential component ensures reliable control operations within complex electrical systems. It offers superior switching capabilities and durability for demanding environments.

Engineered for seamless integration into control systems, the **Siemens 3RH2122-4KB40** provides precise functionality. It is ideal for applications requiring dependable signal interfacing and control circuit management in manufacturing plants and process industries.

-   **Reliable Switching**: Ensures consistent operation for critical control tasks.
-   **Durable Construction**: Built to withstand harsh industrial conditions.
-   **Efficient Performance**: Optimizes control circuit management for enhanced productivity.
-   **Wide Compatibility**: Integrates smoothly with existing Siemens automation infrastructure.
-   **Compact Design**: Facilitates easy installation in control panels.

### Specifications:

Contact Configuration: 4 Normally Open (NO) contacts  
Rated Operational Voltage: Up to 690V  
Rated Operational Current: Up to 10A  
Coil Voltage: Specified by variant (e.g., 24V AC/DC, 230V AC)

Trust in the quality and innovation of **Siemens industrial control products**. The **Siemens 3RH2122-4KB40** is a testament to engineering excellence, providing a dependable solution for your automation needs. Explore its capabilities for your next project.

## Details

- **Price:** 999.0 USD
- **Vendor:** Siemens
- **Type:** Industrial Automation > Control Components > Relays
- **Tags:** automation components, control systems, electrical relay, industrial control module, Ram Automations, Siemens 3RH2122-4KB40, Siemens auxiliary relay

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 999.00 USD | In stock |

## Images

- Siemens 3RH2122-4KB40 Auxiliary Relay Control Module Industrial Automation-Ram Automations

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> Source: [Ram Automations](https://ramautomations.com/products/siemens-3rh2122-4kb40-relay-module)
> Updated: 2026-10-12