--- product_id: 43647798 title: "Onion 2-Channel Relay Expansion for Omega2" brand: "onion" price: "€ 0.16" currency: EUR in_stock: false reviews_count: 1 url: https://www.desertcart.nl/products/43647798-onion-2-channel-relay-expansion-for-omega2 store_origin: NL region: Netherlands --- # 250V AC max voltage 2A max current 1ms typical switching time Onion 2-Channel Relay Expansion for Omega2 **Brand:** onion **Price:** € 0.16 **Availability:** ❌ Out of Stock ## Summary > ⚙️ Power Up Your Projects with Precision! ## Quick Answers - **What is this?** Onion 2-Channel Relay Expansion for Omega2 by onion - **How much does it cost?** € 0.16 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/43647798-onion-2-channel-relay-expansion-for-omega2) ## Best For - onion enthusiasts ## Why This Product - Trusted onion brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Response:** Experience lightning-fast switching times for real-time applications. - • **Stackable Power:** Expand your capabilities with up to 16 relays for ultimate flexibility. - • **I2C Compatibility:** Effortlessly integrate with Omega2 and classic Omega systems. - • **Unleash Your Control:** Seamlessly manage two independent circuits with precision. - • **Versatile Connectivity:** Easily connect with various cables using screw terminals. ## Overview The Onion 2-Channel Relay Expansion for Omega2 is a powerful tool designed for professionals looking to control multiple electrical circuits with ease. Featuring two electromechanical relays, it supports a maximum voltage of 250V AC and a current of 2A, making it ideal for a variety of applications. With the ability to stack up to 8 Relay Expansions, you can manage up to 16 relays simultaneously. Its I2C interface ensures compatibility with Omega2 and Omega2+ systems, while screw terminals provide versatile connection options. ## Description The Relay Expansion enables your Omega to control two other, independent electrical circuits. The circuits are isolated from the Omega and can operate at much higher or lower voltages than the Omega. So you can control other circuits you’ve built or small household appliances rated up to 60W. This Expansion is perfect for home automation projects since it gives you the ability to control other devices remotely using your Omega. It features two electromechanical relays that can switch up to 60W, and are rated for a maximum current of 2A and a maximum voltage of 220V DC or 250V AC. The screw terminals allow you to connect a variety of different cables, leads, and wires. This expansion comes with a 3-bit address switch, allowing you to use up to eight relays with a single Omega. Meaning you can control up to 16 devices with just one Omega! Note: This Expansion requires a Dock with an Expansion Header to use, such as the Expansion Dock, Power Dock, or Arduino Dock R2. Important Warning: If using this Expansion with circuits or appliances that run on household or industrial mains voltage, make sure you fully understand how to work with them safely. Improper preparation such as insufficient insulation, wiring errors, or using wire not rated for your application could result in serious damage not limited to injury or fire. We at Onion do not accept any responsibility for any damages caused by improper use of this product, so make sure you know what you’re doing! ## Features - 2 electromechanical relays allow you to control two other, independent electrical circuits with your Omega - Programmable address allows stacking up to 8 Relay Expansions, that's 16 total relays! - Relay specifications: max voltage: 250V AC, max current: 2A, max switching power: 60W, 62.5VA, typical switching time: 1ms, max switching time: 3ms - I2C interface compatible with Omega2, Omega2+, and classic Omega - Screw terminals allow for connections to a variety of difference cables, leads, and wires ## Images ![Onion 2-Channel Relay Expansion for Omega2 - Image 1](https://m.media-amazon.com/images/I/51lw13D0qBL.jpg) ![Onion 2-Channel Relay Expansion for Omega2 - Image 2](https://m.media-amazon.com/images/I/51QVWwflHjL.jpg) ![Onion 2-Channel Relay Expansion for Omega2 - Image 3](https://m.media-amazon.com/images/I/41HXG8OOXQL.jpg) ![Onion 2-Channel Relay Expansion for Omega2 - Image 4](https://m.media-amazon.com/images/I/51vQKm+6k-L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Five Stars *by S***V on Reviewed in the United Kingdom 🇬🇧 on July 14, 2018* Thank you! --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.nl/products/43647798-onion-2-channel-relay-expansion-for-omega2](https://www.desertcart.nl/products/43647798-onion-2-channel-relay-expansion-for-omega2) --- *Product available on Desertcart Netherlands* *Store origin: NL* *Last updated: 2026-09-26*