# Siemens 3RH2122-1AF00 Auxiliary Contactor, 2NO + 2NC, 110V AC, Size S00

**URL:** https://aio.lv/en/product--siemens-3rh21221af00--1806041
**Data updated:** 2026-05-18 02:47 (EEST)
**Category:** Computer Component Accessories
**Manufacturer:** Siemens
**Manufacturer code:** 3RH21221AF00
**EAN:** 4011209847569
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 39.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 32.64 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rh21221af00--1806041

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RH2122-1AF00 is a high-quality auxiliary contactor designed for industrial control systems. This size S00 unit features 2 normally open (NO) and 2 normally closed (NC) contacts, operating on a 110V AC control voltage. It is engineered for reliable switching of control circuits, ensuring optimal performance and durability in demanding electrical automation environments.

## Long description

The Siemens 3RH2122-1AF00 is a professional-grade auxiliary contactor engineered for integration into industrial control and automation systems. This size S00 device is designed to handle control circuit switching with high precision and reliability. Equipped with two normally open and two normally closed contacts, it provides the necessary flexibility for complex logic and interlocking applications within electrical panels.
Advantages
This auxiliary contactor stands out due to its robust construction and compact size S00 design, which saves valuable space in control cabinets. It offers high operational reliability and long service life, even under demanding industrial conditions. The standardized design ensures seamless compatibility with other Siemens Sirius modular components, facilitating easy installation and maintenance in diverse electrical setups.
Suitable for
Industrial automation control circuits
Signal switching in electrical panels
Interlocking and logic control systems
Motor control center auxiliary functions
When it may not be suitable
This device is not intended for switching high-power main circuits or heavy motor loads, as it is strictly an auxiliary contactor designed for control signals. It is also not suitable for applications requiring DC control voltages, as this specific model is designed exclusively for 110V AC operation.
Key specifications
Size: S00
Contact configuration: 2 normally open (NO) and 2 normally closed (NC)
Control voltage: 110V AC
Mounting type: Standard rail or screw mounting
How to use
The contactor should be installed by a qualified professional within a protected electrical enclosure. Connect the 110V AC control supply to the designated coil terminals. The auxiliary contacts can then be wired into your control logic circuit according to the required switching sequence. Ensure all terminal screws are tightened to the manufacturer's specified torque to prevent loose connections.
What to consider before purchase
Verify that your control system provides a 110V AC signal.
Ensure the S00 size fits your existing DIN rail or panel layout.
Check that the 2NO + 2NC contact configuration meets your specific logic requirements.
Usage recommendations
Always verify the control voltage compatibility before energizing the coil. Regularly inspect the terminal connections for tightness and ensure the device is kept free from dust and moisture to maintain optimal performance.

## FAQ

### How much does the Siemens 3RH2122-1AF00 Auxiliary Contactor cost, and is it available for purchase?

The price is 39.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 9 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 14.07.2026 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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