--- product_id: 3632232 title: "Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse" brand: "elk" price: "KD 16.66" currency: KWD in_stock: true reviews_count: 9 category: "Elk" url: https://www.desertcart.com.kw/products/3632232-elk-trg2440-24vac-40-va-ac-transformer-with-ptc-fuse store_origin: KW region: Kuwait --- # 24 VAC output 40 VA power capacity PTC fuse for resettable protection Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse **Brand:** elk **Price:** KD 16.66 **Availability:** ✅ In Stock ## Summary > ⚡ Power your smart home with confidence and cool efficiency! ## Quick Answers - **What is this?** Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse by elk - **How much does it cost?** KD 16.66 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/3632232-elk-trg2440-24vac-40-va-ac-transformer-with-ptc-fuse) ## Best For - elk enthusiasts ## Why This Product - Trusted elk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Wall-Mount Ready:** Secure installation with included longer screw ensures stability in busy environments. - • **Resettable PTC Fuse:** Built-in safety that resets automatically, preventing downtime and costly replacements. - • **Robust 40 VA Capacity:** Handles demanding HVAC setups without overheating or power dips. - • **Reliable 24 VAC Output:** Perfectly powers smart thermostats like Ecobee with consistent voltage. - • **Cool & Efficient Operation:** Runs significantly cooler than competitors, extending device lifespan and safety. ## Overview The Elk TRG2440 is a 24 VAC, 40 VA wall-mount transformer designed for reliable power delivery to HVAC and smart thermostat systems. Featuring a resettable PTC fuse for enhanced safety and cooler operation than typical transformers, it ensures stable performance and easy installation, making it a top choice for millennial professionals upgrading their smart home setups. ## Description Elk 24 VAC 40 VA resetting transformer Review: So far, so good. - Pretty easy. The packaging shows you what to do with the GND wire (nothing), which I was concerned about immediately. It comes with a longer screw that you can use after removing the screw from your outlet to secure it in place, just in case it gets bumped and wanted to fall out. It is pretty heavy and a little awkward, so I was happy for the extra screw to make sure it would stay put. I'm not an HVAC professional, so I'll just outline my experience. I installed an ecobee4. From my original thermostat, I had a Rc, Y1, W1 and G wire. I had an extra blue wire running to nothing, but using a $20 multimeter I bought, I found it was only running 8-10 VAC. I first turned off the whole system. I live in an apartment complex so, being unfamiliar with HVAC, I A) didn't know exactly where to look to see if I could use that blue wire at the furnace for a C wire and B) didn't want to be seen outside jacking with the complex, and my neighbor's possibly, HVAC stuff. Anyway, I turned everything off. I checked the wires with the multimeter. Initially I'd installed a Nest because I didn't have a C wire and when I turned everything off, the Nest did not say that it needed to be connected to power, so I was worried. I worked for a little longer removing wires VERY carefully and finally realized that I had that mulitmeter and checked the voltage on the wires to find there was nothing running to them. That made everything much more relaxed. I removed all the Nest stuff, then ran the transformer cable up which I just used some extra wire I had. It was nothing special. It had a accessory plug on the end. I have no idea what it was originally for, but I just clipped it off and stripped the wires to where I needed. I attached it to the AC terminals on the plug and, just to test without installing anything or doing anything at all really, plugged the wires into the C and Rh terminals. I got no response. So, hoping that I didn't just fry the thing (which you can't if you're using the correct voltage right? I don't know), I moved the Rh wire to the Rc terminal. It powered on and went through it's thing. I took everything out and put it up on the wall with the cables in place. I attached the easy cables (Y1, W1, G and C). The problem with Rc became that the hole for the wire was really small to only allow for the one wire. The cable from the transformer is threaded. I couldn't get them both to go in. So, I ended up stripping the original Rc, which was a solid wire, and wrapping the threaded wire around the base. Pushed the Rc lead in and made sure the surrounding wires are in tight enough that nothing is exposed to touch the part of the Rc assembly that needed to be left bare to connect the transformer wire. Turned the power on and plugged the transformer in and it power up just as before. It has rebooted once, but I was messing with Homekit, and I think it actually just crashed. It's been fine for the past 5 hours. I looked around for step by step for my wiring, and hope this helps anyone in a similar situation. tl;dr: It works well for the ecobee4. Test it with just the transformer first on Rc or Rh and C to make sure it gets powered on. You'll not break your furnace transformer that way. You might have a hard time with the wires into the ecobee backplate being too much to fit into the receptacle. You can wrap one wire around the other and put the unwrapped one into the backplate. Be sure that it (joined Rc/Rh) won't touch the other wires. Otherwise, it's been great. Oh! I was also super worried about having the external transformer wire connected to the same wire that was initially providing power to the system (as stated, the wire from the transformer is wrapped around the original Rc wire), but I checked it with the multimeter afterward and it still ran the same 26 -29 VAC. Review: Great for Ecobee - I'm using an ecobee3 lite with a pellet stove, which means having to power the smart thermostat from a transformer. This is working perfectly for that purpose. I first tried a Wuyelin transformer but did not like how warm it got. The Elk is easily 50% cooler if not more. ## Features - Elk 24 VAC 40 VA resetting transformer ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0007N5LJK | | Best Sellers Rank | #130,423 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #73 in Power Transformers | | Brand Name | Elk | | Current Rating | 43 Amps | | Customer Reviews | 4.5 4.5 out of 5 stars (760) | | Included Components | Part | | Manufacturer | Elk | | Maximum Frequency | 60 Hz | | Minimum Frequency | 60 Hz | | Model | TRG2440 | | Mounting Type | Wall Mount | | Part Number | TRG2440 | | Power Source | Corded Electric | | Specification Met | CSA, UL | | UPC | 790149862088 762158124402 | | Warranty Description | Year | ## Product Details - **Brand:** Elk - **Current Rating:** 43 Amps - **Mounting Type:** Wall Mount - **Power Source:** Corded Electric - **Specification Met:** CSA, UL ## Images ![Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse - Image 1](https://m.media-amazon.com/images/I/51FxTAKikpL.jpg) ![Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse - Image 2](https://m.media-amazon.com/images/I/21WNWIjwYeL.jpg) ![Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse - Image 3](https://m.media-amazon.com/images/I/610YEgs03bL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ So far, so good. *by K***S on February 4, 2018* Pretty easy. The packaging shows you what to do with the GND wire (nothing), which I was concerned about immediately. It comes with a longer screw that you can use after removing the screw from your outlet to secure it in place, just in case it gets bumped and wanted to fall out. It is pretty heavy and a little awkward, so I was happy for the extra screw to make sure it would stay put. I'm not an HVAC professional, so I'll just outline my experience. I installed an ecobee4. From my original thermostat, I had a Rc, Y1, W1 and G wire. I had an extra blue wire running to nothing, but using a $20 multimeter I bought, I found it was only running 8-10 VAC. I first turned off the whole system. I live in an apartment complex so, being unfamiliar with HVAC, I A) didn't know exactly where to look to see if I could use that blue wire at the furnace for a C wire and B) didn't want to be seen outside jacking with the complex, and my neighbor's possibly, HVAC stuff. Anyway, I turned everything off. I checked the wires with the multimeter. Initially I'd installed a Nest because I didn't have a C wire and when I turned everything off, the Nest did not say that it needed to be connected to power, so I was worried. I worked for a little longer removing wires VERY carefully and finally realized that I had that mulitmeter and checked the voltage on the wires to find there was nothing running to them. That made everything much more relaxed. I removed all the Nest stuff, then ran the transformer cable up which I just used some extra wire I had. It was nothing special. It had a accessory plug on the end. I have no idea what it was originally for, but I just clipped it off and stripped the wires to where I needed. I attached it to the AC terminals on the plug and, just to test without installing anything or doing anything at all really, plugged the wires into the C and Rh terminals. I got no response. So, hoping that I didn't just fry the thing (which you can't if you're using the correct voltage right? I don't know), I moved the Rh wire to the Rc terminal. It powered on and went through it's thing. I took everything out and put it up on the wall with the cables in place. I attached the easy cables (Y1, W1, G and C). The problem with Rc became that the hole for the wire was really small to only allow for the one wire. The cable from the transformer is threaded. I couldn't get them both to go in. So, I ended up stripping the original Rc, which was a solid wire, and wrapping the threaded wire around the base. Pushed the Rc lead in and made sure the surrounding wires are in tight enough that nothing is exposed to touch the part of the Rc assembly that needed to be left bare to connect the transformer wire. Turned the power on and plugged the transformer in and it power up just as before. It has rebooted once, but I was messing with Homekit, and I think it actually just crashed. It's been fine for the past 5 hours. I looked around for step by step for my wiring, and hope this helps anyone in a similar situation. tl;dr: It works well for the ecobee4. Test it with just the transformer first on Rc or Rh and C to make sure it gets powered on. You'll not break your furnace transformer that way. You might have a hard time with the wires into the ecobee backplate being too much to fit into the receptacle. You can wrap one wire around the other and put the unwrapped one into the backplate. Be sure that it (joined Rc/Rh) won't touch the other wires. Otherwise, it's been great. Oh! I was also super worried about having the external transformer wire connected to the same wire that was initially providing power to the system (as stated, the wire from the transformer is wrapped around the original Rc wire), but I checked it with the multimeter afterward and it still ran the same 26 -29 VAC. ### ⭐⭐⭐⭐⭐ Great for Ecobee *by J***Y on March 3, 2025* I'm using an ecobee3 lite with a pellet stove, which means having to power the smart thermostat from a transformer. This is working perfectly for that purpose. I first tried a Wuyelin transformer but did not like how warm it got. The Elk is easily 50% cooler if not more. ### ⭐⭐⭐⭐⭐ I installed this Elk 24v transformer 3 months ago to use with Ring Video Doorbell 2. It is doing the trick perfectly. *by J***N on April 7, 2018* Item being reviews: Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse I installed this 3 months ago to use with Ring Video Doorbell 2. It is doing the trick perfectly. In the posted picture you can see the Elk device and a resistor that I attached to the side to comply with Ring requirements. The Ring Video Doorbell 2 says that the battery can last about 3-12 months depending on how much motion is involved and how far you set the motion sensor to detect. It says if motion is high than it will last less than 3 months. Sure enough, my battery was fully charged when installed, then died within 2 weeks of my high motion location uploading a video every minute to the Ring cloud. So I bought this Elk 24v transformer. The ring documentation says that you must purchase a 25 ohm resistor. So I bought the following resistor to work with this Elk device: Uxcell a12050500ux0030 Aluminum Case 50W 25 Ohm Chassis Mounted Wirewound Resistor After 3 months of sending 1000's of video recordings to the Ring cloud I am happy to report that this device is keeping the battery at 99% and the Ring device has not reported any failure from the Power Source, it has report of Power Status of "Very Good" which means it is fully charged and the correct voltage. ## Frequently Bought Together - Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse - SmartZone-4X Control - 4 Zone Controller KIT w/ Temp Sensor - Universal Replacement for Honeywell zoning Panel truezone hz432 & More - Zone Damper 6" Round Professional-Grade (HVAC Zoning) - Preminum replacement for Honeywell, EWC, Durozone, more (06) --- ## 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.com.kw/products/3632232-elk-trg2440-24vac-40-va-ac-transformer-with-ptc-fuse](https://www.desertcart.com.kw/products/3632232-elk-trg2440-24vac-40-va-ac-transformer-with-ptc-fuse) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-17*