# Siemens 3RH2911-2FA22 Auxiliary Switch Block, 2 NO + 2 NC, Front Mount

**URL:** https://aio.lv/en/product--siemens-3rh29112fa22--1840621
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Miscellaneous repair tools
**Manufacturer:** Siemens
**Manufacturer code:** 3RH29112FA22
**EAN:** 4011209892996
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 16.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 14.04 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rh29112fa22--1840621

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RH2911-2FA22 auxiliary switch block is a high-quality electrical component designed for front mounting on contactors. It features 2 normally open (NO) and 2 normally closed (NC) contacts, providing reliable switching performance for industrial control systems. This modular accessory is essential for expanding the functionality of control circuits, ensuring precise operation and integration within electrical panels and automation setups.

## Long description

The Siemens 3RH2911-2FA22 auxiliary switch block is a professional-grade electrical accessory engineered for seamless integration with contactors. Designed for front-side mounting, this component provides a reliable interface for control and signaling circuits in industrial automation environments. With its robust construction and precise contact configuration, it ensures consistent performance in demanding electrical panel applications.
Advantages
This auxiliary switch block offers significant benefits for system integrators and maintenance professionals. Its modular design allows for quick and secure front mounting, which simplifies installation and saves valuable space within control cabinets. The high-quality contact materials ensure long-term operational reliability and electrical conductivity, minimizing the risk of signal failure in critical control loops. Furthermore, the standardized design ensures full compatibility with the Siemens SIRIUS contactor series, facilitating efficient system expansion and maintenance.
Suitable for
Industrial automation control systems
Motor starter assemblies
Signal feedback loops for PLC inputs
Electrical panel expansion and retrofitting
Safety interlocking circuits
When it may not be suitable
This component is specifically designed for use with compatible Siemens contactors and may not be suitable for installation on contactors from other manufacturers or different product series. It is not intended for high-power switching applications, as it is strictly an auxiliary device for control signals.
Key specifications
Contact configuration: 2 Normally Open (NO) and 2 Normally Closed (NC)
Mounting type: Front mount
Compatibility: Siemens SIRIUS contactors
Connection type: Spring-loaded terminals
How to use
To install the auxiliary switch block, ensure the power supply to the main contactor is disconnected. Align the switch block with the front mounting interface of the contactor and press firmly until it clicks into place. Once secured, connect the control wiring to the spring-loaded terminals according to your circuit diagram. Verify that the contacts actuate correctly by manually testing the contactor before applying full system power.
What to consider before purchase
Verify the compatibility of your existing contactor model
Ensure the contact configuration (2 NO + 2 NC) meets your specific control logic requirements
Check the available physical space on the front of the contactor for mounting
Usage recommendations
Always perform a functional test of the auxiliary contacts after installation to confirm that the NO and NC states transition correctly in response to the contactor coil activation.

## FAQ

### How much does the Siemens 3RH2911-2FA22 Auxiliary Switch Block cost, and is it available for purchase?

The price is 16.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 14 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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