# Output coupler Siemens 3RQ31181AB00 — 1 change-over contact, 24 V AC/DC

**URL:** https://aio.lv/en/product--siemens-3rq31181ab00--1806416
**Data updated:** 2026-03-10 09:04 (EET)
**Category:** Server Parts & Components
**Manufacturer:** Siemens
**Manufacturer code:** 3RQ31181AB00
**EAN:** 4047621000336
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 21.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 18.17 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3rq31181ab00--1806416

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.07.2026 | free |
| Pickup points | 22.07.2026 | 1.89 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

Siemens output coupler 3RQ31181AB00 provides one change-over (SPDT) contact with a 24 V AC/DC coil. Designed for use with compatible relay and control modules, it enables safe switching of circuits in automation panels and control cabinets. Suitable for switching loads, signalling circuits, and interlocking functions; offers compact mounting and straightforward electrical connection.

## Long description

The Siemens Output Coupler 3RQ31181AB00 provides a single change-over (SPDT) contact operated by a 24 V AC/DC coil for integration into relay and control modules. Compact and intended for mounting in automation panels and control cabinets, the unit enables controlled switching of electrical circuits for signalling, interlocking and load control in industrial and building automation systems. The design supports straightforward electrical connection and reliable contact operation under typical control conditions.
Advantages
The output coupler offers a single change-over contact with a 24 V AC/DC coil, enabling both normally open and normally closed switching in one device. Its compact size saves space in control panels while providing standardised connection points for easy installation and maintenance. The component is designed to work with compatible Siemens relay and control modules, ensuring consistent contact performance and predictable switching behaviour.
Suitable for
Switching indicator and signalling circuits in control panels
Interlock and safety logic within automation systems
Controlling small loads and auxiliary circuits
Integration into relay racks and modular control assemblies
Key specifications
Contact configuration: 1 change-over contact (SPDT)
Coil rated voltage: 24 V AC/DC
Mounting: panel or DIN-rail compatible modular mounting (typical for relay modules)
Connection type: standard screw or push-in terminals suitable for control wiring
Application environment: intended for electrical control cabinets and automation panels
How to use
Install the output coupler into a compatible relay or control module according to the panel layout and manufacturer guidance. Connect the coil to a 24 V AC or DC control supply and wire the common, normally open and normally closed contacts to the respective control or load circuits. Verify correct terminal tightening and routing of control and load conductors to prevent interference. Test switching operation under no-load conditions before applying full load to confirm correct wiring and contact function.
Usage recommendations
Use the unit only with compatible relay sockets and control modules designed for miniature output couplers. Ensure the control supply is within the specified 24 V AC/DC range and observe proper isolation and fuse protection for connected load circuits. Regularly inspect terminal connections and operate the device within its intended control-circuit ratings to maintain reliable switching performance.

## FAQ

### How much does the Siemens Output Coupler 3RQ31181AB00 cost, and is it available for purchase?

The price is 21.99 € (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 17.07.2026 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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