--- product_id: 73467200 title: "Functional Devices RIB2401B Enclosed Relay, 20 Amp Spdt with 24 Vac/Dc/120 Vac Coil" brand: "functional devices" price: "€ 30.54" currency: EUR in_stock: true reviews_count: 8 category: "Industrial" url: https://www.desertcart.it/products/73467200-functional-devices-rib2401b-enclosed-relay-20-amp-spdt-with-24 store_origin: IT region: Italy --- # Functional Devices RIB2401B Enclosed Relay, 20 Amp Spdt with 24 Vac/Dc/120 Vac Coil **Brand:** functional devices **Price:** € 30.54 **Availability:** ✅ In Stock ## Quick Answers - **What is this?** Functional Devices RIB2401B Enclosed Relay, 20 Amp Spdt with 24 Vac/Dc/120 Vac Coil by functional devices - **How much does it cost?** € 30.54 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/73467200-functional-devices-rib2401b-enclosed-relay-20-amp-spdt-with-24) ## 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 ## Description Size Name:1 Pack 20 amp SPDT, 24 VAC/DC/120 VAC coil, sold as each, Functional Devices RIB2401B enclosed relay, 20 amp SPDT with 24 VAC/DC/120 VAC coil. Made in United States. Manufactured by Functional Devices, Inc. ## Features - 20 amp spdt - 24 vac/dc/120 vac coil - Sold as each - ›See more product details ## Images ![Functional Devices RIB2401B Enclosed Relay, 20 Amp Spdt with 24 Vac/Dc/120 Vac Coil - Image 1](https://images-na.ssl-images-amazon.com/images/I/51lzImZIYTL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect for 2-speed Whole House Fan control in conjunction with Alexa/Echo *by D***K on August 31, 2017* Well OK, it's not easy to get excited about a relay, but this one has worked perfectly for my application. I'm using it to switch speeds when controlling my 2-speed QuietCool ES-3100 whole house fan via my Alexa+SmartThings setup, in conjunction with two on/off Z-Wave switches (one switch controls power to the fan, the other selects Hi/Lo by using this relay).I know the 20 amp rating on this relay is overkill for the 670W fan motor, but I wanted to be prepared in case I want to up-size the fan in the future.I mounted this relay right onto the junction box that's part of the fan; a perfect fit. A lock nut is included with the relay for attaching through 1/2" openings on junction boxes. Very good quality product, highly recommended, with the connection diagram clearly marked on the unit itself. ### ⭐⭐⭐⭐⭐ I like that it can fail open or shut and like that it has a friendly diagram for the novice *by J***S on August 15, 2018* So I am not an electrician, just a DIY guy - so take this with a grain of salt. But I liked this relay because you could attach it directly to the punch out box of a electric junction box. I used this relay in conjunction with a little giant water pump.Little Giant 554542 VCMX-20ULS-C - also purchased on amazonSo my dehumidifier in the basement was always filling up and I had to dump manually. Instead I have the pump as the condensate catcher and it automatically kicks in every now and again based on a float switch to pump out the water to my sewer line. I found a nice tube already going in and just added a T. Not bad.But the water pump also has a float shutoff switch if it overflows. But that switch is low voltage. So I have a 24V transformer supplying the power, and this transformer can either fail the circuit open or fail the circuit closed. There is a nice diagram right on the front. I chose to fail open, but that was just my preference.So again, the transformer supplies the power, as long as the emergency float switch is not thrown, power flows to the 24v side of the relay, and 115v power is supplied to the new outlet to power the dehumidifier. BUT - if the pump starts overflowing, the 24v loop is cut, the transformer shuts off power to the 115v side, and the dehumidifier loses electricity and turns off.Pretty slick ### ⭐⭐⭐⭐⭐ Convenient design, Flexible and simple to use. *by D***N on March 20, 2016* Have used many 15amp RIBs for both A/C controls and Lighting controls. Used this 20amp one as a Lighting Control, needed it to fix another electricians problem. He had too many amps passing thru a switch, was able to use switch relay with switch and lighting with relay.These have the dual options for the coil and also the NO/NC switch. Allowing great flexibility in design. --- ## 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.it/products/73467200-functional-devices-rib2401b-enclosed-relay-20-amp-spdt-with-24](https://www.desertcart.it/products/73467200-functional-devices-rib2401b-enclosed-relay-20-amp-spdt-with-24) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-08*