# Siemens 3RQ4018-1AB00 Output Coupler, 24V AC/DC, 1CO Contact, Screw Terminals

**URL:** https://aio.lv/en/product--siemens-3rq4018-1ab00--12463440
**Data updated:** 2026-05-18 09:43 (EEST)
**Category:** Control Systems
**Manufacturer:** Siemens
**Manufacturer code:** 3RQ4018-1AB00
**EAN:** 4047621118468
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 30.99 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 25.61 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rq4018-1ab00--12463440

## 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 3RQ4018-1AB00 is a compact output coupler designed for reliable signal isolation and switching in industrial control systems. It operates on 24V AC/DC and features a single changeover (1CO) contact with a thermal current rating of 6A. Housed in a slim 6.2mm wide enclosure, this relay module ensures efficient space utilization in control cabinets and provides secure electrical connections via screw terminals.

## Long description

The Siemens 3RQ4018-1AB00 output coupler is a high-performance relay module engineered for seamless signal isolation and switching within industrial automation environments. This compact device facilitates reliable communication between control systems and field devices, ensuring stable operation in demanding electrical setups. With its slim design and robust construction, it serves as an essential component for modern control cabinet configurations.
Advantages
This output coupler offers significant space-saving benefits due to its narrow 6.2mm width, allowing for high-density mounting in control panels. The integrated relay design simplifies installation and maintenance, while the 24V AC/DC compatibility provides flexibility across various control voltage standards. The use of secure screw terminals ensures a vibration-resistant and durable electrical connection, minimizing the risk of signal loss or intermittent contact issues in industrial settings.
Suitable for
Industrial automation and control systems
Signal isolation between PLC outputs and field devices
Switching small to medium-sized loads
Space-constrained control cabinet installations
This device may not be suitable for applications requiring high-power switching beyond its 6A thermal current rating. It is also not intended for environments with extreme moisture, corrosive gases, or excessive mechanical vibration that exceeds standard industrial specifications.
Key specifications
Operating voltage: 24V AC/DC
Contact configuration: 1 change-over (1CO) contact
Thermal current rating: 6A
Connection type: Screw terminals
Module width: 6.2mm
To install the output coupler, mount the unit onto a standard DIN rail within your control cabinet. Connect the control signal wires to the input terminals and the load circuit wires to the output terminals using the provided screw connections. Ensure that all wiring is performed in accordance with local electrical safety standards and that the power supply matches the 24V AC/DC rating before energizing the circuit.
What to consider before purchase
Verify that your control system output voltage matches the 24V AC/DC requirement.
Ensure the 6A thermal current rating is sufficient for your specific load requirements.
Check the available space on your DIN rail to accommodate the 6.2mm module width.
Confirm that the screw terminal connection type aligns with your existing wiring infrastructure.
Usage recommendations: Regularly inspect the screw terminal connections for tightness during routine maintenance cycles to ensure long-term operational reliability. Avoid exceeding the specified thermal current limit to prevent premature relay wear.

## FAQ

### How much does the Siemens 3RQ4018-1AB00 Output Coupler 24V AC/DC 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 — 28 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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