--- product_id: 44372060 title: "Functional Devices RIB2401B Power Relay, 20 Amp SPDT, 24 Vac/dc/120 Vac Coil, NEMA 1 Housing" brand: "rib" price: "€ 66.59" currency: EUR in_stock: true reviews_count: 13 category: "Rib" url: https://www.desertcart.pt/products/44372060-functional-devices-rib2401b-power-relay-20-amp-spdt-24-vac store_origin: PT region: Portugal --- # 20A high current capacity NEMA 1 enclosed housing SPDT versatile switching Functional Devices RIB2401B Power Relay, 20 Amp SPDT, 24 Vac/dc/120 Vac Coil, NEMA 1 Housing **Brand:** rib **Price:** € 66.59 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your control game with power and precision! ## Quick Answers - **What is this?** Functional Devices RIB2401B Power Relay, 20 Amp SPDT, 24 Vac/dc/120 Vac Coil, NEMA 1 Housing by rib - **How much does it cost?** € 66.59 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/44372060-functional-devices-rib2401b-power-relay-20-amp-spdt-24-vac) ## Best For - rib enthusiasts ## Why This Product - Trusted rib brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power Up to 20 Amps ⚡:** Handles heavy-duty electrical loads with ease, perfect for industrial and smart home upgrades. - • **Made in the USA 🇺🇸:** Crafted domestically for trusted quality and durability you can count on. - • **Secure Screw Mounting 🏠:** Robust NEMA 1 housing with screw terminals ensures reliable, safe, and tidy setup. - • **Dual Coil Compatibility 🔄:** Operates seamlessly on 24 VAC/DC or 120 VAC coils for flexible installation options. - • **Silver Contact Reliability ✨:** Premium silver contacts guarantee long-lasting performance and minimal signal loss. ## Overview The Functional Devices RIB2401B is a high-quality, 20 amp SPDT power relay featuring versatile 24 VAC/DC or 120 VAC coil compatibility. Housed in a durable NEMA 1 enclosure with secure screw terminals and silver contacts, it delivers reliable switching for industrial or smart home applications. Made in the USA, this relay is designed for professionals seeking dependable, heavy-duty electrical control solutions. ## Description 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. Review: ⭐⭐⭐⭐⭐ Works perfectly — gives smart control to old heaters - Used this Functional Devices RIB2401B relay to have an Ecobee Lite control a kerosene heater in my workshop to prevent freezing. Setup was simple — installed in minutes, and it’s handling 20A with no issues. I set it to maintain 40°F by offsetting the temperature delta and only trigger when it’s 3° below set point. Now I have full remote control, and the heater cycles exactly as intended. If you want to add smart control to a traditional heater or other high-current device, this relay makes it easy, reliable, and safe. Review: These are high quality relays! - These are high quality manufactured relays! They work well. The only real issue with them is that they are hard to figure out which one you need for your application. They don't come with any documentation. The mfrs web site has some information, but read up on your application needs before choosing the model you need. There are many models to choose from. The only other thing to note is that some of the models do not engage immediately depending on the wiring of the circuit board in the box. I've seen some models with about a 1 sec delay, if this is important to you. ## Features - Product Type:Dip Switch - Item Package Weight:0.204 Kilograms - Item Package Dimension:6.35 cm L X11.176 cm W X17.018 cm H - Country Of Origin: United States ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000LEUJU6 | | Best Sellers Rank | #32,435 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Electromechanical Relays | | Brand | RIB | | Brand Name | RIB | | Coil Resistance | 2.78 ohm | | Coil Voltage | 120 volts | | Connector Type | Screw | | Contact Current Rating | 20 A | | Contact Material | Silver | | Contact Type | Normally Open | | Current Rating | 20 A | | Customer Reviews | 4.6 out of 5 stars 470 Reviews | | Included Components | Accessories | | Item Weight | 7.84 ounces | | Manufacturer | Functional Devices, Inc | | Maximum Switching Current | 20 A | | Minimum Switching Voltage | 120 volts_of_alternating_current | | Model | RIB2401B | | Mounting Type | Screw Mount | | Number of Items | 1 | | Number of Packs | 1 | | Number of Terminals | 3 | | Operation Mode | Manual | | Part Number | RIB2401B | | UPC | 643129353819 | | Unit Count | 1 Count | | Upper Temperature Rating | 60 °C | | Warranty Description | No Warranty | | Wattage | 900 watts | ## Product Details - **Connector Type:** Screw - **Contact Material:** Silver - **Contact Type:** Normally Open - **Current Rating:** 20 A - **Mounting Type:** Screw Mount ## Images ![Functional Devices RIB2401B Power Relay, 20 Amp SPDT, 24 Vac/dc/120 Vac Coil, NEMA 1 Housing - Image 1](https://m.media-amazon.com/images/I/81amxWRLnuL.jpg) ## Questions & Answers **Q: Please verify: contacts are 20amp, 120v and 'coil' voltage can be anything from 24vac/dc to 120vac?** A: Yes to both questions. Enclosed Power Relay 20Amp SPDT. Coil voltage input is 24VAC/DC ; 120VAC ; 50-60 Hz **Q: Can a 24 volt thermostat connection be used with this to turn on a 120 volt circulator pump?** A: I am using the unit to power a duct booster fan, (120 V-1/4hp)from my 24v out put terminal on my HVAC circuitboard powering the relay, so you should be OK. **Q: What are the detentions of this relay?** A: did you mean the dimensions if so its 60mmx82mmx47mm tall **Q: I have two food warmers 120v @ 12amp that can not be on at the same time. Can I use this to allow only one warmer at a time?** A: The connection is a single switch (SPDT, means Single pole double throw, and that means on or off) If you connect one warmer it will turn on only that one. If you connect both to the relay it will overload it...it's a 20 amp device and 12 + 12 is 24, overload. If you want to get creative you can connect a manual switch that connects to one warmer or the other then connect this relay to that device. Then, depending on which way the manual switch is, that warmer will be controlled, move the manual switch the other way and it will operate the other warmer. ## Customer Reviews ### ⭐⭐⭐⭐⭐ ⭐⭐⭐⭐⭐ Works perfectly — gives smart control to old heaters *by B***U on February 7, 2026* Used this Functional Devices RIB2401B relay to have an Ecobee Lite control a kerosene heater in my workshop to prevent freezing. Setup was simple — installed in minutes, and it’s handling 20A with no issues. I set it to maintain 40°F by offsetting the temperature delta and only trigger when it’s 3° below set point. Now I have full remote control, and the heater cycles exactly as intended. If you want to add smart control to a traditional heater or other high-current device, this relay makes it easy, reliable, and safe. ### ⭐⭐⭐⭐⭐ These are high quality relays! *by D***D on June 2, 2026* These are high quality manufactured relays! They work well. The only real issue with them is that they are hard to figure out which one you need for your application. They don't come with any documentation. The mfrs web site has some information, but read up on your application needs before choosing the model you need. There are many models to choose from. The only other thing to note is that some of the models do not engage immediately depending on the wiring of the circuit board in the box. I've seen some models with about a 1 sec delay, if this is important to you. ### ⭐⭐⭐⭐⭐ The solution for my solar inverter that does not have an internal Neutral to Ground bonding relay!!! *by D***O on October 19, 2025* This was the missing piece for my home solar setup. I have an EG4 3000EHV-48 inverter connected to two eco-worthy 48v rack-mount batteries (purchased from Amazon.com) and some solar panels. The issue was that the inverter does not have an internal Neutral to Ground bonding relay. In simple English, when I tried running my devices on battery, the electrical supply was unstable, the LED lights started flickering, etc. After months of research I was able to determine that the missing N-G bonding relay was the issue and I after more research the Functional Devices RIB2401B relay kept coming up as the relay to get to peform the simple task of monitoring my AC power (power from the electrical grid) on my main panel and then if there is a power outage, it would simply connect the Neutral and Ground wires in my load panel (devices to be powered by battery if I lose power). This worked perfectly, and I am finally able to enjoy my solar investment. ## Frequently Bought Together - Functional Devices RIB2401B Power Relay, 20 Amp SPDT, 24 Vac/dc/120 Vac Coil, NEMA 1 Housing - Functional Devices RIBU1C Enclosed Pilot Relay, 10 Amp Spdt with 10-30 Vac/Dc/120 Vac Coil - AC Infinity RAXIAL S6, Inline Booster Duct Fan 6” with Speed Controller - Low Noise Inline HVAC Blower Can Fan for Basements, Bathrooms, Kitchens, Workshops --- ## 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/44372060-functional-devices-rib2401b-power-relay-20-amp-spdt-24-vac](https://www.desertcart.pt/products/44372060-functional-devices-rib2401b-power-relay-20-amp-spdt-24-vac) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-09-27*