# Siemens 3RQ4118-1AB00 Plug-In Coupler Relay, 24V AC/DC, 1CO Contact, Screw Terminal

**URL:** https://aio.lv/en/product--siemens-3rq4118-1ab00--12448215
**Data updated:** 2026-05-18 02:46 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3RQ4118-1AB00
**EAN:** 4047621118284
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 24.49 €
**Prices and availability valid until:** 2026-08-01 23:59
**Price without VAT (21%):** 20.24 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rq4118-1ab00--12448215

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 21.07.2026 | free |
| Pickup points | 24.07.2026 | 1.89 EUR |
| Courier delivery to door | 24.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RQ4118-1AB00 is a compact plug-in coupling relay designed for industrial control applications. It operates on a 24V AC/DC supply voltage and features a single changeover (1CO) contact configuration. With a slim 6.2mm width and reliable screw terminal connections, this relay is ideal for space-saving installations in control cabinets, providing efficient signal isolation and switching for various automation systems.

## Long description

The Siemens 3RQ4118-1AB00 is a high-performance plug-in coupler relay engineered for precise industrial control and automation tasks. This compact device is designed to operate seamlessly with a 24V AC/DC supply voltage, offering reliable signal switching and electrical isolation. With its slim 6.2mm profile, it is specifically optimized for high-density control cabinet environments where space is at a premium, ensuring efficient integration into modern electrical systems.
Advantages
This coupling relay provides exceptional reliability and space efficiency due to its narrow design, which allows for a higher density of components within a single control panel. The use of robust screw terminals ensures a secure and vibration-resistant connection, maintaining signal integrity over long periods of operation. Furthermore, the 1CO contact configuration offers versatile switching capabilities, making it a flexible solution for various automation requirements while maintaining low power consumption and high thermal current capacity.
Suitable for
Industrial automation and control systems
Signal isolation between control and load circuits
Space-constrained control cabinets
Interface applications between PLC outputs and field devices
When it may not be suitable
This relay is not intended for high-power switching applications that exceed its thermal current rating of 6A. It is also not suitable for environments requiring specialized hazardous area protection or extreme outdoor conditions without appropriate protective enclosures.
Key specifications
Supply voltage: 24V AC/DC
Contact configuration: 1 change-over (1CO) contact
Thermal current: 6A
Width: 6.2mm
Connection type: Screw terminal
How to use
The relay is designed for quick and easy installation on standard mounting rails. To use, securely snap the unit onto the rail and connect the control and load wires to the designated screw terminals. Ensure that the supply voltage matches the 24V AC/DC specification before energizing the circuit. Once installed, the plug-in design allows for straightforward maintenance and replacement of the relay element without needing to disconnect the primary wiring.
What to consider before purchase
Verify that the 24V AC/DC control voltage matches your existing system requirements.
Ensure the 6A thermal current rating is sufficient for your specific load.
Confirm that the 6.2mm width fits your current rail layout.
Check that your wiring setup is compatible with screw terminal connections.
Usage recommendations: Always ensure that the power supply is disconnected during installation or maintenance to prevent electrical hazards. Periodically inspect the screw terminal connections to ensure they remain tight and free from oxidation.

## FAQ

### How much does the Siemens 3RQ4118-1AB00 Plug-In Coupler Relay cost, and is it available for purchase?

The price is 24.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 18 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 21.07.2026 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

https://aio.lv/img/cache/product/12448215/68795475_large.webp