# Siemens 3RH1921-1EA11 Auxiliary Switch Block, 1NO + 1NC, Side-Mounted

**URL:** https://aio.lv/en/product--siemens-3rh19211ea11--1840453
**Data updated:** 2026-05-18 02:51 (EEST)
**Category:** Printer & Copier Parts
**Manufacturer:** Siemens
**Manufacturer code:** 3RH19211EA11
**EAN:** 4011209293526
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 42.49 €
**Prices and availability valid until:** 2026-08-07 23:59
**Price without VAT (21%):** 35.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rh19211ea11--1840453

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 27.07.2026 | free |
| Pickup points | 30.07.2026 | 1.89 EUR |
| Courier delivery to door | 30.07.2026 | 18.30 EUR |

## Summary description

The Siemens 3RH1921-1EA11 is a side-mounted auxiliary switch block designed for integration with contactors. It features 1 normally open (NO) and 1 normally closed (NC) contact configuration. This reliable switching component is essential for expanding control circuit capabilities in industrial automation systems, ensuring precise signal feedback and operational efficiency in various electrical installations.

## Long description

The Siemens 3RH1921-1EA11 is a high-quality side-mounted auxiliary switch block engineered for seamless integration with industrial contactors. This component provides a reliable interface for control circuits, featuring a configuration of one normally open (NO) and one normally closed (NC) contact. It is designed to enhance the functionality of electrical systems by providing essential feedback signals and enabling complex switching logic within automation setups.
Advantages
This auxiliary switch block offers exceptional reliability and durability, meeting the rigorous standards required for industrial environments. Its side-mounting design allows for space-efficient installation, making it an ideal choice for compact control panels where every millimeter counts. The robust construction ensures long-term operational stability, reducing the need for frequent maintenance and minimizing downtime in critical electrical installations.
Suitable for
Industrial automation control systems
Motor control centers
Electrical distribution panels
Signal feedback loops in machinery
This component may not be suitable for applications requiring high-current power switching, as it is designed specifically for control circuit signals. It is also not compatible with contactors that do not support side-mounted auxiliary blocks or those from different series that lack the necessary mechanical interface.
Key specifications
Contact configuration: 1 NO + 1 NC
Mounting type: Side-mounted
Compatibility: Designed for integration with Siemens contactors
Function: Auxiliary signal switching
Installation of the Siemens auxiliary switch block should be performed by qualified personnel in accordance with local electrical regulations. The unit clips onto the side of the compatible contactor, ensuring a secure mechanical and electrical connection. Ensure that the main power supply is disconnected before attempting to mount or wire the device to prevent accidental contact or short circuits.
What to consider before purchase
Verify compatibility with your specific contactor model
Ensure sufficient space is available on the side of the contactor for mounting
Confirm that the 1NO + 1NC configuration meets your control logic requirements
Usage recommendations: Regularly inspect the terminal connections for tightness and ensure the switch block is free from dust or debris to maintain optimal electrical conductivity and signal reliability.

## FAQ

### How much does the Siemens 3RH1921-1EA11 Auxiliary Switch Block cost, and is it available for purchase?

The price is 42.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 27.07.2026 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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