--- product_id: 9682049 title: "Functional Devices RIB-U1C Relay in a Box" brand: "functional devices" price: "€ 42.78" currency: EUR in_stock: true reviews_count: 8 category: "Functional Devices" url: https://www.desertcart.pt/products/9682049-functional-devices-rib-u1c-relay-in-a-box store_origin: PT region: Portugal --- # High-speed switching Versatile connectivity Robust protection Functional Devices RIB-U1C Relay in a Box **Brand:** functional devices **Price:** € 42.78 **Availability:** ✅ In Stock ## Summary > ⚡ Power Up Your Potential with RIB-U1C! ## Quick Answers - **What is this?** Functional Devices RIB-U1C Relay in a Box by functional devices - **How much does it cost?** € 42.78 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/9682049-functional-devices-rib-u1c-relay-in-a-box) ## Best For - functional devices enthusiasts ## Why This Product - Trusted functional devices brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Robust protection features safeguard your investment against power surges and failures. - • **Connect with Confidence:** Versatile connectivity options ensure seamless integration into your existing systems. - • **Compact & Efficient Design:** Space-saving design fits perfectly in any setup without compromising on performance. - • **Future-Proof Your Operations:** Stay ahead of the curve with a relay that adapts to your evolving needs. - • **Unleash Lightning-Fast Performance:** Experience high-speed switching that keeps your operations running smoothly. ## Overview The RIB-U1C Relay in a Box is a cutting-edge relay solution designed for high-speed switching and versatile connectivity, ensuring robust protection and efficiency in a compact design. Perfect for modern operations looking to enhance performance and reliability. ## Description Review: RIBU1C versatile relay - This relay can be used for a myriad of projects. The coil voltage,(what makes the relay work), can be used with 10-30 volts ac or dc or even 120 volts ac. This means you can control anything up to an 1/8 hp fan motor on 277volts by something with voltages as small as a residential AC thermostat. (24vac) These relays are also a great option for frequency drives for use as a start signal controller. This relay can be sent a 10vdc signal from a digital output to start a VFD. With parameters set, a speed reference isn’t needed if you simply want the controlled device to run at full speed. I highly recommend this relay. Review: Works well with smart thermostat and old millivolt furnace - I needed a relay that could work with a new smart thermostat and my very old natural gas wall furnace. The wall furnace is controlled by a millivolt valve but the smart thermostat uses 24 V(a.c.) to control HVAC equipment. This relay allowed me to use the output from the smart thermostat to control the relay and toggle its normally open relay output. The LED is helpful to knowing the relay state. The mounting to 1/2" knockout is handy too. ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.8 out of 5 stars 118 Reviews | ## Images ![Functional Devices RIB-U1C Relay in a Box - Image 1](https://m.media-amazon.com/images/I/81qs4FZLlUL.jpg) ![Functional Devices RIB-U1C Relay in a Box - Image 2](https://m.media-amazon.com/images/I/81G0E7MBtIL.jpg) ![Functional Devices RIB-U1C Relay in a Box - Image 3](https://m.media-amazon.com/images/I/81dkgDPtICL.jpg) ![Functional Devices RIB-U1C Relay in a Box - Image 4](https://m.media-amazon.com/images/I/91nQALtgzhL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ RIBU1C versatile relay *by J***N on March 22, 2024* This relay can be used for a myriad of projects. The coil voltage,(what makes the relay work), can be used with 10-30 volts ac or dc or even 120 volts ac. This means you can control anything up to an 1/8 hp fan motor on 277volts by something with voltages as small as a residential AC thermostat. (24vac) These relays are also a great option for frequency drives for use as a start signal controller. This relay can be sent a 10vdc signal from a digital output to start a VFD. With parameters set, a speed reference isn’t needed if you simply want the controlled device to run at full speed. I highly recommend this relay. ### ⭐⭐⭐⭐⭐ Works well with smart thermostat and old millivolt furnace *by R***F on November 15, 2025* I needed a relay that could work with a new smart thermostat and my very old natural gas wall furnace. The wall furnace is controlled by a millivolt valve but the smart thermostat uses 24 V(a.c.) to control HVAC equipment. This relay allowed me to use the output from the smart thermostat to control the relay and toggle its normally open relay output. The LED is helpful to knowing the relay state. The mounting to 1/2" knockout is handy too. ### ⭐⭐⭐⭐⭐ Best Price *by C***P on August 12, 2025* My furnace guy installed this. He initially told me what we needed and not to but through his Oil company because they were charging $155 for it. Like 5 times what I paid. At least he was honest. --- ## 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.pt/products/9682049-functional-devices-rib-u1c-relay-in-a-box](https://www.desertcart.pt/products/9682049-functional-devices-rib-u1c-relay-in-a-box) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-05-16*