---
product_id: 254258171
title: "24VAC 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Ring Doorbells | Made in Vietnam"
brand: "royal apex"
price: "₩34794"
currency: KRW
in_stock: true
url: https://www.desertcart.kr/products/254258171-24vac-40va-thermostat-and-doorbell-transformer-power-supply-compatible-nest
store_origin: KR
region: South Korea
---

# 40VA high power output Universal 24V AC compatibility RU-certified safety & durability 24VAC 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Ring Doorbells | Made in Vietnam

**Brand:** royal apex
**Price:** ₩34794
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your smart home like a boss—never settle for underpowered again!

## Quick Answers

- **What is this?** 24VAC 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Ring Doorbells | Made in Vietnam by royal apex
- **How much does it cost?** ₩34794 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/254258171-24vac-40va-thermostat-and-doorbell-transformer-power-supply-compatible-nest)

## Best For

- royal apex enthusiasts

## Why This Product

- Trusted royal apex brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** Sleek, lightweight design fits discreetly while delivering powerful, consistent 24V AC output.
- • **Power Up Like a Pro:** Upgrade your home with a robust 40VA transformer powering multiple smart thermostats and doorbells effortlessly.
- • **Certified Peace of Mind:** RU-certified transformer ensures reliable, safe operation for your smart home ecosystem.
- • **Plug & Play Universal Fit:** Seamlessly compatible with Nest, Ecobee, Honeywell, Sensi, Ring, and more—no compatibility worries.
- • **Built to Last, Built to Perform:** Crafted with pure copper wiring and flame-retardant materials for premium durability and safety.

## Overview

The Royal Apex 24VAC 40VA Transformer is a high-performance, RU-certified power supply designed to reliably power multiple smart thermostats and doorbells simultaneously. Compatible with leading brands like Nest, Ecobee, Honeywell, and Ring, it features pure copper wiring and flame-retardant materials for enhanced durability and safety, making it the ultimate upgrade for any smart home setup.

## Description

24VAC 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Ring Doorbells | Made in Vietnam

## Features

- 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
- 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
- SPECIFICATION: Input is 208-240 V/ AC, 50/60 Hz; Output: 24 V/ 40 VA , Class 2 Transformer with Class B Insulation System
- RU CERTIFIED AND SAFE USE: This 24 volt transformer is RU-certified, offers reliable performance
- PURE COPPER, ANTI RUST AND ESD PROTECTED : Use high-quality materials, high-quality silicon steel plate, all-copper enameled wire, nylon flame-retardant J rubber core, flame-retardant tape, high-temperature resistance lead and vacuum impregnation varnish treatment

## Technical Specifications

| Specification | Value |
|---------------|-------|
| UPC | 704335537018 |
| Manufacturer | Royal Apex |
| Part number | RA-191-05860 |
| Item Weight | 150 g |
| Package Dimensions | 9 x 7 x 5 cm; 150 g |
| Item model number | RA-191-05860 |
| Color | multi |
| Item Package Quantity | 1 |
| Included components | TRANSFORMER |
| Batteries Required? | No |

## Product Details

- **Brand:** Royal Apex
- **Power source:** AC Adapter
- **Mounting type:** Wall Mount
- **Specification met:** RU
- **Item weight:** 150 Grams

## Images

![24VAC 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Ring Doorbells | Made in Vietnam - Image 1](https://m.media-amazon.com/images/I/61flQrqACbL.jpg)

## Frequently Bought Together

- Royal Apex 24VAC 40VA Thermostat and Doorbell Transformer, Power Supply Compatible with Nest, Ecobee, Sensi and Honeywell Thermostat, Nest Hello Ring Doorbells | Made in Vietnam
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**Shop now:** [https://www.desertcart.kr/products/254258171-24vac-40va-thermostat-and-doorbell-transformer-power-supply-compatible-nest](https://www.desertcart.kr/products/254258171-24vac-40va-thermostat-and-doorbell-transformer-power-supply-compatible-nest)

---

*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-01-26*