---
product_id: 179478623
title: "Hotop 24 Volt Transformer 40 VA AC Transformer Plug in with PTC Fuse Compatible with Ring Doorbell and Thermostat Compatible with Nest, Ecobee, Sensi/Honeywell/24V Adapter(1 Pack,Without Screw Holes)"
brand: "hotop"
price: "162 zł"
currency: PLN
in_stock: true
reviews_count: 12
category: "Hotop"
url: https://www.desertcart.pl/products/179478623-hotop-24-volt-transformer-40-va-ac-transformer-plug-in
store_origin: PL
region: Poland
---

# 24V output power 40VA capacity PTC fuse safety Hotop 24 Volt Transformer 40 VA AC Transformer Plug in with PTC Fuse Compatible with Ring Doorbell and Thermostat Compatible with Nest, Ecobee, Sensi/Honeywell/24V Adapter(1 Pack,Without Screw Holes)

**Brand:** hotop
**Price:** 162 zł
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your smart home power game — never settle for less!

## Quick Answers

- **What is this?** Hotop 24 Volt Transformer 40 VA AC Transformer Plug in with PTC Fuse Compatible with Ring Doorbell and Thermostat Compatible with Nest, Ecobee, Sensi/Honeywell/24V Adapter(1 Pack,Without Screw Holes) by hotop
- **How much does it cost?** 162 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/179478623-hotop-24-volt-transformer-40-va-ac-transformer-plug-in)

## Best For

- hotop enthusiasts

## Why This Product

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

## Key Features

- • **Compact Yet Mighty:** Small footprint fits easily into any home setup without clutter or hassle.
- • **Built-In Safety Shield:** Auto-resetting PTC fuse and LED power indicator keep your setup secure and visible.
- • **Power Up Without Limits:** Reliable 24V AC output ensures your smart devices never underperform.
- • **Engineered for Stability:** UL certified with stable voltage delivery, designed to handle voltage fluctuations gracefully.
- • **Plug & Play Compatibility:** Seamlessly works with Ring, Nest, Ecobee, Honeywell, and Sensi smart home systems.

## Overview

This 24 Volt, 40 VA AC plug-in transformer delivers consistent power to smart doorbells and thermostats, including Ring, Nest, Ecobee, Honeywell, and Sensi. Featuring a built-in auto-resetting PTC fuse and LED power indicator, it ensures safe, stable operation. UL certified and designed for easy installation, it replaces underpowered transformers to eliminate device malfunctions and power issues.

## Description

24 Volt Transformer, 40 VA AC Transformer Plug in with PTC Fuse Compatible with Ring Doorbell and Thermostat, Compatible with Nest, Ecobee, Sensi/Honeywell/ 24V Adapter (1 Pack) - desertcart.com

Review: Works as it should - Got this transformer to replace an older 16V transformer in my house as I needed up upgrade for a Tapo doorbell unit I received recently. I bought this transformer and a replacement 24V doorbell chime. This transformer seems to work well and performs as expected. Other reviews state that this transformer outputs higher than 24vac. Yes, that’s true but it’s on purpose. There is no regulation on these. It’s a straight step down transformer. The higher voltage will drop for two reasons. 1) current draw (load) and 2) cable run (length). Both of these things have a greater effect on voltage drop than a regulated power supply would have. People who are complaining about the higher voltage measured at the transformer clearly have no idea how this works. They just know enough to know how a DMM (voltmeter) works and that’s it. Additionally, most commercial circuits in medium to high end electronics have a tolerance for what the input voltage can be as well. Usually somewhere in the realm of +/- 10-15% of its highest input value. Moral of this story is, It’s perfectly safe to run this with a 24vac connected device. My credentials are I have a BS in manufacturing, and a PhD in Computer and electrical engineering.
Review: Works perfectly! - I purchased this for a ring doorbell. My mother didn’t want to set the wiring so we are using the existing wiring in the house already and needed something that would provide 24v output to the device. I tested the device first before plugging it in as my mother got her ring doorbell for free and I didn’t want to fry it. Red Lead on 0v and Black (power) on 24v. The readout was indeed AC, fluctuating from +24v to -24v with a max being +- 30v. The max the ring doorbell can take is 40v so that was great. I checked the connection of the wire for shorts and breaks (resistance) and everything was good. Set it up and it’s working fine. It’s perfect for my needs, though it is a bit bulky causing me to rearrange my plug but it is working and the ring doorbell is recognizing its connected to hardwire. My mother is happy and I got to use my Applied Integrated Technology degree. Win win.

## Features

- Eliminate doorbell/ thermostat underpower hassle: 24V 40VA plug-in transformer replaces and upgrades underpowered transformer with this 24V AC transformer
- Specification: input voltage: 120 VAC, 60Hz; Output voltage: 24V, 40VA
- Safe and stable: auto-resetting (PTC) fused secondary, LED green power indicator, positive/ negative/ screw terminals
- Universal compatibility: this 24v transformer is compatible with Ring Video Doorbell, Ring Video Doorbell 2, Ring Video Doorbell Pro, Nest Skybell doorbell
- Also compatible with Nest, Ecobee, Honeywell, and Sensi smart thermostats, and other devices that require constant 24-volt power for operation;

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B083R621RV |
| Best Sellers Rank | #18,701 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Door Bell Transformers |
| Date First Available | January 11, 2020 |
| Item Weight | 1.61 pounds |
| Item model number | PS D40 |
| Manufacturer | Hotop |
| Product Dimensions | 2.13 x 2.56 x 3.94 inches |
| Specification Met | UL |
| UPC | 796168988969 |

## Product Details

- **Brand:** Hotop
- **Current Rating:** 1.5 Amps
- **Mounting Type:** Wall Mount
- **Power Source:** Corded Electric
- **Product Dimensions:** 2.13"D x 2.56"W x 3.94"H

## Images

![Hotop 24 Volt Transformer 40 VA AC Transformer Plug in with PTC Fuse Compatible with Ring Doorbell and Thermostat Compatible with Nest, Ecobee, Sensi/Honeywell/24V Adapter(1 Pack,Without Screw Holes) - Image 1](https://m.media-amazon.com/images/I/61YFD+Gn2UL.jpg)

## Available Options

This product comes in different **Number Of Items** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works as it should
*by D***Y on December 11, 2025*

Got this transformer to replace an older 16V transformer in my house as I needed up upgrade for a Tapo doorbell unit I received recently. I bought this transformer and a replacement 24V doorbell chime. This transformer seems to work well and performs as expected. Other reviews state that this transformer outputs higher than 24vac. Yes, that’s true but it’s on purpose. There is no regulation on these. It’s a straight step down transformer. The higher voltage will drop for two reasons. 1) current draw (load) and 2) cable run (length). Both of these things have a greater effect on voltage drop than a regulated power supply would have. People who are complaining about the higher voltage measured at the transformer clearly have no idea how this works. They just know enough to know how a DMM (voltmeter) works and that’s it. Additionally, most commercial circuits in medium to high end electronics have a tolerance for what the input voltage can be as well. Usually somewhere in the realm of +/- 10-15% of its highest input value. Moral of this story is, It’s perfectly safe to run this with a 24vac connected device. My credentials are I have a BS in manufacturing, and a PhD in Computer and electrical engineering.

### ⭐⭐⭐⭐⭐ Works perfectly!
*by K***S on August 20, 2023*

I purchased this for a ring doorbell. My mother didn’t want to set the wiring so we are using the existing wiring in the house already and needed something that would provide 24v output to the device. I tested the device first before plugging it in as my mother got her ring doorbell for free and I didn’t want to fry it. Red Lead on 0v and Black (power) on 24v. The readout was indeed AC, fluctuating from +24v to -24v with a max being +- 30v. The max the ring doorbell can take is 40v so that was great. I checked the connection of the wire for shorts and breaks (resistance) and everything was good. Set it up and it’s working fine. It’s perfect for my needs, though it is a bit bulky causing me to rearrange my plug but it is working and the ring doorbell is recognizing its connected to hardwire. My mother is happy and I got to use my Applied Integrated Technology degree. Win win.

### ⭐⭐⭐⭐⭐ Great Adapter
*by A***R on October 4, 2025*

So far, so good! Nice and clean and easy to use.

## Frequently Bought Together

- Hotop 1 Pack 24 Volt Transformer, 40 VA AC Transformer Plug in with PTC Fuse Competible with All Versions of Ring Doorbell and Thermostat, Compatible with Nest, Ecobee, Sensi, Honeywell, 24V Adapter
- Syston 18/2 Thermostat Doorbell HVAC Heating Control Cable Wire, 18 AWG 2 Conductors 100% Solid Copper Conductors CL3R/FT4/CMR Riser-Rated, UV Resistant RoHS for Low Voltage Applications Use
- Syston 18/4 Thermostat Doorbell HVAC Heating Control Cable Wire, 100% Solid Copper Conductors CL3R/FT4/CMR Riser-Rated UL/ETL Listed, UV Resistant RoHS for Indoor/Outdoor Low Voltage Applications Use

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-05-26*