# Siemens 3RQ4118-1AE01 Plug-In Coupler, 115V AC/DC, 1CO Contact, Screw Terminals

**URL:** https://aio.lv/en/product--siemens-3rq4118-1ae01--12469856
**Data updated:** 2026-05-18 09:27 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3RQ4118-1AE01
**EAN:** 4047621118345
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 35.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 29.33 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rq4118-1ae01--12469856

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The Siemens 3RQ4118-1AE01 is a compact plug-in output coupling relay designed for industrial control systems. It operates at 115V AC/DC and features a 1CO (changeover) contact with gold-plated contacts for reliable signal transmission. With a narrow 6.2mm width and screw terminal connections, it is ideal for space-saving installations in control cabinets where high-density wiring is required. Rated for a 6A thermal current, it ensures efficient switching performance.

## Long description

The Siemens 3RQ4118-1AE01 is a high-performance plug-in output coupling relay engineered for demanding industrial control environments. This compact device operates on a 115V AC/DC supply and features a single changeover (1CO) contact configuration. Designed with precision, it incorporates hard gold-plated contacts to ensure superior signal reliability and minimal contact resistance, making it an essential component for sensitive control applications.
Advantages
The primary benefit of this coupling relay is its exceptionally narrow 6.2mm housing, which significantly optimizes space within crowded control cabinets. By allowing for high-density mounting, it enables engineers to design more compact electrical systems without sacrificing functionality. The inclusion of hard gold-plated contacts provides long-term stability and protection against oxidation, ensuring consistent performance even in low-current switching scenarios. Furthermore, the screw terminal design facilitates secure and straightforward wiring, reducing installation time and maintenance efforts.
Suitable for
Industrial automation and control systems
Signal isolation between controllers and field devices
Applications requiring high-density component mounting
Switching low-voltage signals with high reliability
When it may not be suitable
This relay is not intended for high-power switching applications that exceed its 6A thermal current rating. It is also not suitable for environments where the control voltage deviates from the specified 115V AC/DC range, as this could lead to operational failure or damage to the internal components.
Key specifications
Operating voltage: 115V AC/DC
Contact configuration: 1 change-over (1CO) contact
Contact material: Hard gold-plated
Width: 6.2 mm
Thermal current: 6 A
Connection type: Screw terminals
How to use
The relay is designed for mounting on standard DIN rails within a control cabinet. Begin by ensuring the power supply is disconnected. Snap the unit onto the rail and connect the control and load wires to the designated screw terminals, ensuring that the torque specifications are followed to prevent damage to the terminals. Once wired, verify the connections before restoring power to the system.
What to consider before purchase
Verify that your control system output matches the 115V AC/DC requirement.
Ensure the 6A thermal current limit is sufficient for your specific load.
Check available space in your control cabinet to confirm the 6.2mm width is appropriate.
Usage recommendations: For optimal longevity and performance, ensure the relay is installed in an environment free from excessive dust and moisture. Regularly inspect the screw terminal connections during scheduled maintenance to ensure they remain tight and free from corrosion.

## FAQ

### How much does the Siemens 3RQ4118-1AE01 Plug-In Coupler cost, and is it available for purchase?

The price is 35.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 16.07.2026 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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