# Wago 788-303 Relay Module 12V DC 1-Pole Grey

**URL:** https://aio.lv/en/product--wago-788-303--12450260
**Data updated:** 2026-05-18 02:41 (EEST)
**Category:** Server Parts & Components
**Manufacturer:** Wago
**Manufacturer code:** 788-303
**EAN:** 4055143184106
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.99 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 13.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--wago-788-303--12450260

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The Wago 788-303 is a reliable 1-pole relay module designed for industrial control and automation systems. Operating at 12V DC, this grey relay unit provides efficient signal switching and electrical isolation. It is engineered for secure mounting and integration into standard control cabinets, ensuring consistent performance in various electrical applications.

## Long description

The Wago 788-303 is a professional-grade 1-pole relay module engineered for industrial automation and control systems. Operating on a 12V DC power supply, this compact unit facilitates reliable signal switching and provides essential electrical isolation between control circuits and field devices. Its robust construction and grey housing are designed for seamless integration into standard electrical control cabinets, ensuring long-term operational stability and consistent performance in demanding environments.
Advantages
This relay module offers high reliability for industrial applications, ensuring precise switching operations whenever required. The compact design allows for efficient use of space within control panels, while the high-quality materials used in its construction guarantee durability and resistance to standard operational wear. By providing effective electrical isolation, it protects sensitive control electronics from potential interference or voltage spikes, contributing to the overall safety and longevity of the automation system.
Suitable for
Industrial automation and control systems
Signal switching in electrical cabinets
Electrical isolation between control and load circuits
Integration into PLC-based control architectures
When it may not be suitable
This module is designed specifically for 12V DC systems and will not function correctly if connected to AC power or higher DC voltages. It is not intended for high-power switching applications that exceed the current rating of the internal relay contacts.
Key specifications
Operating voltage: 12V DC
Configuration: 1-pole
Colour: Grey
Dimensions: 15 x 86 x 54 mm
Weight: 45.86 g
How to use
The Wago 788-303 is designed for mounting on standard DIN rails within a control cabinet. Ensure the power supply is disconnected before installation. Connect the control signal wires to the input terminals and the load circuit wires to the output terminals according to the wiring diagram provided by the manufacturer. Once securely mounted and wired, verify the connections before restoring power to the system.
What to consider before purchase
Verify that your control system operates on a 12V DC supply.
Ensure the physical dimensions fit within your existing control cabinet layout.
Check that the 1-pole configuration meets your specific switching requirements.
Usage recommendations
Always ensure that the relay module is installed in a clean, dry environment within a protected enclosure to prevent exposure to moisture, dust, or extreme temperatures, which could affect the performance of the electrical components.

## Specifications

| Feature | Value |
|---|---|
| Dimensions (WxDxH) | 15 x 86 x 54 |
| Weight | 0.0459 kg |
| Product colour | Grey |

## FAQ

### How much does the Wago 788-303 Relay Module cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 127 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 08.07.2026 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 Wago 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 Wago 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/12450260/68777584_large.webp