--- product_id: 670936297 title: "HQRP 120V-240V to 24V 40VA Transformer Compatible with Nest, Ecobee, Sensi, Honeywell Thermostat, Nest Doorbell and All Versions of Ring Doorbell Power Supply Adapter Door-Bell 120v-240v-to-24v, UL" brand: "hqrp" price: "$110.84" currency: USD in_stock: true category: "Hqrp" url: https://www.desertcart.us/products/670936297-hqrp-120v-240v-to-24v-40va-transformer-compatible-with-nest store_origin: US region: United States of America --- # 40VA high power output 120V-240V universal input UL & CSA safety certified HQRP 120V-240V to 24V 40VA Transformer Compatible with Nest, Ecobee, Sensi, Honeywell Thermostat, Nest Doorbell and All Versions of Ring Doorbell Power Supply Adapter Door-Bell 120v-240v-to-24v, UL **Brand:** hqrp **Price:** $110.84 **Availability:** ✅ In Stock ## Summary > ⚡ Power your smart life with confidence and ease! ## Quick Answers - **What is this?** HQRP 120V-240V to 24V 40VA Transformer Compatible with Nest, Ecobee, Sensi, Honeywell Thermostat, Nest Doorbell and All Versions of Ring Doorbell Power Supply Adapter Door-Bell 120v-240v-to-24v, UL by hqrp - **How much does it cost?** $110.84 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/670936297-hqrp-120v-240v-to-24v-40va-transformer-compatible-with-nest) ## Best For - hqrp enthusiasts ## Why This Product - Trusted hqrp brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safety First, Always:** UL and CSA certified for peace of mind and reliable, efficient performance in your smart home setup. - • **Effortless Installation:** Wall-mount ready with screw or clamp options—get your smart devices powered up in minutes. - • **Universal Compatibility:** Seamlessly works with Nest, Ecobee, Honeywell, Sensi thermostats, plus all Ring and Nest Hello doorbells. - • **Upgrade Your Smart Home:** Replace underpowered transformers and avoid downtime with this high-efficiency, reliable power adapter. - • **Power Up Multiple Devices:** Robust 24V AC output powers several smart thermostats and doorbells simultaneously without a hitch. ## Overview The HQRP 120V-240V to 24V 40VA Transformer is a UL and CSA certified power adapter designed to deliver reliable 24V AC power for multiple smart thermostats and doorbells, including Nest, Ecobee, Honeywell, Sensi, and all Ring models. Its universal input voltage and easy installation make it the perfect upgrade for any smart home enthusiast seeking consistent, high-efficiency power. ## Description Compatible With 120V-240V to 24V 40VA Transformer Compatible With Nest, Compatible With Ecobee, Compatible With Sensi, Compatible With Honeywell Thermostat, Compatible With Nest Hello Doorbell and All Versions of Ring Doorbell Power Supply Adapter Door-Bell 120v-240v-to-24v ReplacementDisclaimer:This is not an Original Equipment Manufacturer (OEM) product, HQRP branded product is a replacement. All brand names and logos are registered trademarks of their respective owners. Any use of the brand names or model designations for this product are made solely for purposes of demonstrating compatibility. ## Features - HQRP® Replacement Transformer; POWER UP MULTIPLE THERMOSTATS / DOORBELLS: replaces and upgrades underpowered transformer with this 24V AC transformer, offering plenty of power for single or multiple thermostats and doorbells at the same time; - Input: 120V-240V AC; Output: 24V AC; 40VA; UNIVERSAL COMPATIBILITY: this 24v transformer fits for Nest, Ecobee, Honeywell and Sensi smart thermostats; Also compatible with Ring Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Nest Skybell Doorbell, and other devices that require constant 24 volt power for operation; - C(UR)US Listed; Safety Features: High Efficiency and Reliability; - 1 Year warranty! EASY TO INSTALL: screw down or threaded clamp to electrical box, simple to wire up; Compatible With: 24V 40VA Transformer compatible with Nest, Ecobee, Sensi, Honeywell Thermostat, Nest Hello Doorbell and All Versions of Ring Doorbell Power Supply Adapter Door-Bell 120v-240v-to-24v Replacement; ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0849RNB6S | | ASIN | B0849RNB6S | | Best Sellers Rank | #208,196 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #27 in Door Bell Transformers | | Brand Name | HQRP | | Customer Reviews | 4.4 4.4 out of 5 stars (198) | | Customer reviews | 4.4 4.4 out of 5 stars (198) | | Date First Available | 29 June 2020 | | Item model number | 887774401282011 | | Manufacturer | HQRP | | Manufacturer | HQRP | | Minimum Frequency | 60 Hz | | Model | 887774401282011 | | Mounting Type | Wall Mount | | Package Dimensions | 10.49 x 6.91 x 6.81 cm; 712 g | | Part Number | 887774401282011 | | Power Source | Corded Electric | | Specification Met | CSA, UL | | UPC | 884667525003 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** HQRP - **Mounting type:** Wall Mount - **Number of Items:** 1 - **Power source:** Corded Electric - **Specification met:** CSA, UL ## Images ![HQRP 120V-240V to 24V 40VA Transformer Compatible with Nest, Ecobee, Sensi, Honeywell Thermostat, Nest Doorbell and All Versions of Ring Doorbell Power Supply Adapter Door-Bell 120v-240v-to-24v, UL - Image 1](https://m.media-amazon.com/images/I/71rlVobRSBL.jpg) ## Questions & Answers **Q: Need a 220v transformer for the ring. Will this work for a single ring and chime in the circuit?** A: Hello, It will be appropriate for 220v as well as for the ring. **Q: Will it keep your ring doorbell charged** A: Yes it will. In case of an outage happened, the Ring doorbell still sent messages to your smart phone. **Q: Can i use this to run a 120v fan with a 24vac thermostat?** A: You could run 120v from the source (wall, etc) to the fan power and the transformer input, and the 24v transformer output to the thermostat. **Q: Why black wire is common and white wire is 120v? Is it the white wire is not supposed to be common?** A: Hello, There is a diagram in the picture 6, black wire is common. ## Frequently Bought Together - HQRP 120V-240V to 24V 40VA Transformer Compatible with Nest, Ecobee, Sensi, Honeywell Thermostat, Nest Doorbell and All Versions of Ring Doorbell Power Supply Adapter Door-Bell 120v-240v-to-24v, UL - OEM Upgraded Replacement for Goodman Furnace Vent Air Pressure Switch B13701-42 - OEM 47-22861-01 Replacement Furnace Limit Switch L350 Compatible with Rheem #47-22861-01 (2) --- ## 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.us/products/670936297-hqrp-120v-240v-to-24v-40va-transformer-compatible-with-nest](https://www.desertcart.us/products/670936297-hqrp-120v-240v-to-24v-40va-transformer-compatible-with-nest) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-12*