# Siemens 3RQ4118-1AF00 Plug-In Coupling Relay, 230V AC/DC, 1CO Contact, 6A

**URL:** https://aio.lv/en/product--siemens-3rq4118-1af00--12445694
**Data updated:** 2026-05-18 02:54 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3RQ4118-1AF00
**EAN:** 4047621118369
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 30.99 €
**Prices and availability valid until:** 2026-07-31 23:59
**Price without VAT (21%):** 25.61 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rq4118-1af00--12445694

## 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 3RQ4118-1AF00 is a compact plug-in coupling relay designed for industrial automation and control systems. It operates at 230V AC/DC and features a single changeover (1CO) contact with a thermal current rating of 6A. With a slim 6.2mm width, this relay is ideal for space-saving installations in control cabinets, ensuring reliable signal switching and electrical isolation between control and load circuits.

## Long description

The Siemens 3RQ4118-1AF00 is a high-performance plug-in coupling relay engineered for industrial automation and control applications. This compact device serves as a reliable interface between control systems and field devices, ensuring efficient signal switching and electrical isolation. With its slim design and robust construction, it is specifically built to optimize space within control cabinets while maintaining high operational standards.
Advantages
The primary benefit of this coupling relay is its extremely compact 6.2mm width, which allows for high-density mounting in limited spaces. The device supports both AC and DC voltage at 230V, providing flexibility in various electrical environments. Its screw terminal connection ensures a secure and vibration-resistant installation, while the single changeover contact offers versatile switching capabilities for diverse control tasks.
Suitable for
Industrial automation control panels
Signal isolation between PLC and field devices
Switching small to medium-sized loads
Space-constrained electrical cabinets
When it may not be suitable
This relay is not intended for switching high-power loads exceeding its 6A thermal current rating. It is also not suitable for environments requiring specialized protection against extreme moisture or corrosive gases without additional housing.
Key specifications
Operating voltage: 230V AC/DC
Contact configuration: 1 change-over (1CO) contact
Thermal current: 6A
Width: 6.2mm
Connection type: Screw terminals
How to use
The relay is designed for mounting on standard DIN rails within control cabinets. To install, snap the unit onto the rail and connect the control and load wiring to the designated screw terminals. Ensure that the supply voltage matches the 230V AC/DC specification before energizing the circuit. The plug-in design allows for quick replacement of the relay module if maintenance is required without disconnecting the entire wiring assembly.
What to consider before purchase
Verify that your control system output matches the 230V AC/DC voltage requirement.
Ensure the 6A thermal current rating is sufficient for your specific load.
Check available space on your DIN rail to accommodate the 6.2mm width.
Confirm that screw terminal connections are compatible with your existing wiring standards.
Usage recommendations
Always ensure that the power supply is disconnected before performing any installation or maintenance work on the relay 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 3RQ4118-1AF00 Plug-In Coupling Relay cost, and is it available for purchase?

The price is 30.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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

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