--- product_id: 502116107 title: "24VAC 40VA Plug in Transformer,Doorbell Transformer Compatible with All of Doorbell，Nest, Ecobee, Sensi and Honeywell Thermostat" brand: "wuyelin" price: "280.24 DT" currency: TND in_stock: true url: https://www.desertcart.tn/products/502116107-24vac-40va-plug-in-transformer-doorbell-transformer-compatible-with-all store_origin: TN region: Tunisia --- # 40VA high power output LED power indicator Universal 24VAC compatibility 24VAC 40VA Plug in Transformer,Doorbell Transformer Compatible with All of Doorbell，Nest, Ecobee, Sensi and Honeywell Thermostat **Brand:** wuyelin **Price:** 280.24 DT **Availability:** ✅ In Stock ## Summary > ⚡ Power your smart life with confidence and style! ## Quick Answers - **What is this?** 24VAC 40VA Plug in Transformer,Doorbell Transformer Compatible with All of Doorbell，Nest, Ecobee, Sensi and Honeywell Thermostat by wuyelin - **How much does it cost?** 280.24 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/502116107-24vac-40va-plug-in-transformer-doorbell-transformer-compatible-with-all) ## Best For - wuyelin enthusiasts ## Why This Product - Trusted wuyelin brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First:** Built-in auto-resetting PTC fuse ensures stable, safe operation without interruptions - • **Smart Compatibility:** Seamlessly works with Nest, Ecobee, Honeywell, Sensi, and top video doorbells - • **Plug & Play Simplicity:** Easy screw terminal design lets you customize cable length for a clean, professional install - • **Visual Power Assurance:** Green LED indicator confirms your transformer is delivering consistent power - • **Power Up Your Smart Home:** Reliable 40VA output powers all major thermostats & doorbells without battery hassle ## Overview This 24VAC 40VA plug-in transformer delivers stable, high-capacity power tailored for smart thermostats and video doorbells. Featuring universal compatibility with leading brands like Nest, Ecobee, Honeywell, and Sensi, it ensures seamless integration and eliminates frequent battery replacements. Its easy-install screw terminals and built-in safety fuse with LED indicator make it a reliable, professional-grade upgrade for any smart home setup. ## Description Style:24V AC 40VA Thermostat and Doorbell TransformerCompatible model: Nest Hello Doorbell, Doorbells Video Doorbell, Video Doorbell Pro Video Doorbell 2 Thermostat Nest Thermostat Ecobee Thermostat Honeywell Smart WiFi Thermostat Sensi Thermostat Specification: Input voltage: 120V AC, 60Hz Output voltage: 24V±5% AC 40 VANo-load voltage ：27.2VAC±5%Output with screw terminals，auto-resetting (PTC) fused ## Features - Doorbell/Thermostat power solution: 24Vac 40VA wall transformer, using this Transformer to replace and upgrade the insufficient power transformer, can provide sufficient power for your thermostat and doorbell, save the trouble of frequent battery replacement - Specification: input voltage: 120 VAC, 60Hz; Output voltage: 24V, 40VA ,No-load output voltage: 26.6V,SAFE AND STABLE auto-resetting (PTC) fused secondary, LED green power indicator - Compatible With: This transformer compatible for Honeywell, Nest, Ecobee, and Sensi smart thermostats; Also compatible with Video Doorbell, Video Doorbell 2, Video Doorbell Pro, Nest Skybell Doorbell。Note: The brand above is only for demonstrating compatibilityyy - Easy to install:Output with screw terminals, You can freely cut the connecting cable and arrange the cable according to the length you need to make the installation simple and beautiful - Multimeter test products: When using a multimeter to test products, pay attention to using an AC voltmeter or multimeter to test the output voltage value, and use a voltage tester to measure accurate voltage output data. The no-load voltage output measured by the multimeter is about 26.6-28V, which is normal and does not affect any use. ## Technical Specifications | Specification | Value | |---------------|-------| | Maximum frequency | 60 Hz | | Minimum frequency | 60 Hz | | Specification met | RoHS | | Item weight | 0.7 Kilograms | | UPC | 791309016563 | | Manufacturer | WUYELIN | | Part number | HU-XI-22 | | Item Weight | 700 g | | Product Dimensions | 5.33 x 6.35 x 9.65 cm; 700 g | | Item model number | HU-XI-22 | | Wattage | 40 watts | | Batteries included? | No | | Batteries Required? | No | ## Product Details - **Brand:** WUYELIN - **Power source:** Battery Powered - **Product dimensions:** 5.3D x 6.4W x 9.7H centimetres - **Mounting type:** Wall Mount - **Current rating:** 1.66 Amps ## Images ![24VAC 40VA Plug in Transformer,Doorbell Transformer Compatible with All of Doorbell，Nest, Ecobee, Sensi and Honeywell Thermostat - Image 1](https://m.media-amazon.com/images/I/51+xAjpjPsL.jpg) ## Questions & Answers **Q: what does the OV stand for?** A: OV stands for output voltage **Q: Will this support 2 different ring doorbells?** A: yes,You need to connect correctly **Q: Do they normally get a little hot?** A: The transformer will get a little hot during operation. If the temperature exceeds the load, there is a recoverable fuse at the output of the transformer, the protection will be activated and the output will be disconnected **Q: Will this work with the Logitech Circleview Doorbell?** A: If it takes 24V, then yes. I have it on my Ring which needs 16-24V, works great. ## Frequently Bought Together - 24VAC 40VA Plug in Transformer,Doorbell Transformer Compatible with All of Doorbell，Nest, Ecobee, Sensi and Honeywell Thermostat - Emerson 90 380 Fan Relay 24 Volt Coil, 1 --- ## 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.tn/products/502116107-24vac-40va-plug-in-transformer-doorbell-transformer-compatible-with-all](https://www.desertcart.tn/products/502116107-24vac-40va-plug-in-transformer-doorbell-transformer-compatible-with-all) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-28*