---
product_id: 286196861
title: "220V 240V On/Off Switch Electric Heating Relay with Built-in 24V Transformer, Replacement for Any Relay, Compatible with 24V Thermostat"
brand: "briidea"
price: "฿2993"
currency: THB
in_stock: true
reviews_count: 13
category: "Briidea"
url: https://www.desertcart.co.th/products/286196861-220v-240v-on-off-switch-electric-heating-relay-with-built
store_origin: TH
region: Thailand
---

# 240V max switching voltage Built-in 24V transformer Side junction box mount 220V 240V On/Off Switch Electric Heating Relay with Built-in 24V Transformer, Replacement for Any Relay, Compatible with 24V Thermostat

**Brand:** briidea
**Price:** ฿2993
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your HVAC game with instant power and effortless install!

## Quick Answers

- **What is this?** 220V 240V On/Off Switch Electric Heating Relay with Built-in 24V Transformer, Replacement for Any Relay, Compatible with 24V Thermostat by briidea
- **How much does it cost?** ฿2993 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/286196861-220v-240v-on-off-switch-electric-heating-relay-with-built)

## Best For

- briidea enthusiasts

## Why This Product

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

## Key Features

- • **Robust Build:** UL-certified with silver contacts for reliable, long-lasting performance
- • **Instant Activation:** Immediate relay response ensures precise temperature control and ultimate comfort
- • **Wide Operating Range:** Operates flawlessly from -4℉ to 140℉, perfect for any environment
- • **Universal Compatibility:** Seamlessly replaces any brand relay for hassle-free upgrades
- • **Plug & Play Installation:** Mounts easily on your existing junction box—no electrician needed

## Overview

The Briidea Electric Heating Relay is a versatile 220-240V on/off switch featuring a built-in 24V transformer, compatible with both 2-wire and 3-wire 24V thermostats. Designed for quick, tool-free installation on the side of existing junction boxes, it delivers immediate relay activation for superior temperature control. UL-certified and built with durable silver contacts, it operates reliably across a wide temperature range, making it the smart choice for modern HVAC upgrades.

## Description

Product Description:Compatible with a 2-wire and 3-wire thermostat, this all-in-one relay includes a built-in 24V transformer, replacement for any brand relay. Compatible with 24V thermostats with 3-wire connections (R, W, C) or 2-wire connections (R, W). Immediate relay activation provides improved temperature control and comfort. Easy to Install, merely mounted it on the side of the existing junction box and attached the wires from the new thermostat.Specifications:Transformer Ratings: 24 VAC/ 1.2VA/ Class 2Ambient Operating Temperature: -4℉ to 140℉ (-20℃ to 60℃)Ambient Storage: -40℉ to 175℉ (-40℃ to 80℃)Humidity Limits: 0 to 95% non-condensingTerminal Wire Size: 12 AWG

Review: Great investment - This works great. Even better than the one I had to replace Has much better controls and more options
Review: Easy to install, works for LV thermostat with C wire or not - Very easy and simple to install. Very quiet and precise. I'll recommend it for a hydronic electric baseboard heater or regular electric baseboard heater.

## Features

- ★ Replacement for any brand relay
- ★ Built-in 24V transformer
- ★ Compatible with 24V thermostats with 3-wire connections (R, W, C) or 2-wire connections (R, W)
- ★ Immediate relay activation provides improved temperature control and comfort
- ★ Easy to install, merely munted it on the side of existing junction box and attached the wires from the new thermostat

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08VRW52NQ |
| Best Sellers Rank | #402,975 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #350 in HVAC Controls |
| Brand Name | briidea |
| Coil Voltage | 24 Volts |
| Connector Type | Screw |
| Contact Material | Silver |
| Contact Type | Normally Open |
| Customer Reviews | 4.1 4.1 out of 5 stars (142) |
| Manufacturer | briidea |
| Maximum Switching Voltage | 240 Volts |
| Minimum Switching Voltage | 24 Volts (DC) |
| Mounting Type | Side of Junction Box Mount |
| Operation Mode | Electric |
| Specification Met | UL |
| Wattage | 1.2 watts |

## Product Details

- **Brand:** briidea
- **Connector Type:** Screw
- **Contact Material:** Silver
- **Contact Type:** Normally Open
- **Mounting Type:** Side of Junction Box Mount

## Images

![220V 240V On/Off Switch Electric Heating Relay with Built-in 24V Transformer, Replacement for Any Relay, Compatible with 24V Thermostat - Image 1](https://m.media-amazon.com/images/I/61Z9WTqnopL.jpg)

## Questions & Answers

**Q: I have 20A, 240v breaker for pool pump. Can I use this w a smart light switch rated for 120v?**
A: This relay is only rated for 24v

**Q: Is this item UL listed?**
A: No

**Q: Is the bridea electric heating relay ul approved?**
A: There is indication that it is, but I could be wrong.

**Q: Can this be used to change 120v line voltage thermostat to new 24v low voltage thermostat?**
A: Yes, it transforms 120v down to 24v for low voltage thermostat.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great investment
*by A***R on February 18, 2026*

This works great. Even better than the one I had to replace Has much better controls and more options

### ⭐⭐⭐⭐⭐ Easy to install, works for LV thermostat with C wire or not
*by F***Z on March 23, 2026*

Very easy and simple to install. Very quiet and precise. I'll recommend it for a hydronic electric baseboard heater or regular electric baseboard heater.

### ⭐⭐⭐⭐⭐ A+ Exceptional Relay for the Price - Time will tell on longevity
*by P***S on November 13, 2025*

Works perfectly and exactly as advertised. Key will be longevity. One design feature to be careful of with this is the instant on. If you end up cycling on and off and then back on there is potential to cause damage to your heating circuits. That is NOT a design flaw in this relay, but, a key feature consideration for your usage. That is how it is designed and it is perfect for my application. Most relays have a delay, some as long as 5 minutes.

## Frequently Bought Together

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**Shop now:** [https://www.desertcart.co.th/products/286196861-220v-240v-on-off-switch-electric-heating-relay-with-built](https://www.desertcart.co.th/products/286196861-220v-240v-on-off-switch-electric-heating-relay-with-built)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-30*