---
product_id: 497110965
title: "24V 40VA Control Transformer, Primary 120/208/240V, Secondary 24V Isolation Transformer with Foot Mount for HVAC Furnace Multi Tap"
brand: "wuyelin"
price: "$84"
currency: NZD
in_stock: true
reviews_count: 8
category: "Wuyelin"
url: https://www.desertcart.nz/products/497110965-24v-40va-control-transformer-primary-120-208-240v-secondary-24v
store_origin: NZ
region: New Zealand
---

# 40 VA power rating Multi-tap primary voltage 120/208/240V Foot mount for easy installation 24V 40VA Control Transformer, Primary 120/208/240V, Secondary 24V Isolation Transformer with Foot Mount for HVAC Furnace Multi Tap

**Brand:** wuyelin
**Price:** $84
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your control systems with precision and confidence!

## Quick Answers

- **What is this?** 24V 40VA Control Transformer, Primary 120/208/240V, Secondary 24V Isolation Transformer with Foot Mount for HVAC Furnace Multi Tap by wuyelin
- **How much does it cost?** $84 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/497110965-24v-40va-control-transformer-primary-120-208-240v-secondary-24v)

## 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

- • **Stable 24V Output:** Delivers a reliable 24V AC secondary voltage, perfect for sensitive control circuits.
- • **Proven Reliability:** Backed by top user reviews and a #1 rank in Power Transformers—don’t get left in the dark.
- • **Compact & Durable Design:** Small footprint (2.04 x 2.68 x 2.28 in) with rugged foot mount ensures hassle-free installation and longevity.
- • **Trusted Industrial Grade:** CE certified and engineered for HVAC, relays, gas valves, and industrial control applications.
- • **Versatile Multi-Tap Input:** Seamlessly supports 120, 208, or 240V primary voltages for ultimate HVAC flexibility.

## Overview

This 24V 40VA control transformer features a multi-tap primary voltage (120/208/240V) and a stable 24V AC secondary output, designed for HVAC and industrial control applications. Compact and foot-mounted for easy installation, it’s CE certified and highly rated for reliability and performance.

## Description

Buy 24V 40VA Control Transformer, Primary 120/208/240V, Secondary 24V Isolation Transformer with Foot Mount for HVAC Furnace Multi Tap: Power Transformers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Got our steam boiler up and running again without a service call from an HVAC guy. - This died in our Weil Mclain steam boiler after 20+ years. Perfect replacement, no problems. I'm an EE so replacing a transformer was a pretty simple operation.
Review: Great for the price - Still working great

## Features

- Primary Voltage: 120/208/240 V AC ,
- Secondary Voltage: 24 V AC
- Power Rating：40 VA
- Compatibility: Transformers can be used in industrial, heating and air conditioning controls including air conditioning circuits, relays and gas valves or other applications up to the listed ratings
- Directly tested with a multimeter is no-load voltage: AC26.6V-27.5V

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B8Z2XV7V |
| Best Sellers Rank | #6,406 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Power Transformers |
| Date First Available | August 8, 2022 |
| Item Weight | 1.65 pounds |
| Item model number | PS-AC2440D |
| Manufacturer | Shenzhen Yelinda Electronics Co., Ltd. |
| Product Dimensions | 2.04 x 2.68 x 2.28 inches |
| Specification Met | CE |
| UPC | 768461152330 |

## Product Details

- **Brand:** WUYELIN
- **Current Rating:** 1.66 Amps
- **Mounting Type:** Foot Mount
- **Power Source:** AC
- **Product Dimensions:** 2.04"D x 2.68"W x 2.28"H

## Images

![24V 40VA Control Transformer, Primary 120/208/240V, Secondary 24V Isolation Transformer with Foot Mount for HVAC Furnace Multi Tap - Image 1](https://m.media-amazon.com/images/I/71cOPXyHz-L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Got our steam boiler up and running again without a service call from an HVAC guy.
*by D***N on January 7, 2026*

This died in our Weil Mclain steam boiler after 20+ years. Perfect replacement, no problems. I'm an EE so replacing a transformer was a pretty simple operation.

### ⭐⭐⭐⭐⭐ Great for the price
*by J***T on December 19, 2025*

Still working great

### ⭐⭐⭐⭐⭐ EXPLOSIONS AND FIRE (solved)
*by M***E on April 15, 2025*

UPDATE 6/5/25: I noticed that the seller has used these diagrams to provide input wiring instructions in their product photos. I will assume that they have updated their paper instructions as well. Therefore I am upgrading this to a 5 star product. -------------------------- Several reviewers have posted about these transformers blowing up / catching fire / burning out after a short period of use. Since the wiring instructions that came with the product were equally as helpful as the product photos, I am sharing what I have learned after instantly blowing up this transformer and having it catch fire. Initially I wired this transformer as follows: White-Neutral, Black-120v, Orange-120v. I immediately discovered that I was wrong. I was able to communicate with the seller using diagrams and they said that this transformer is designed to only use a Neutral on White and a single Hot on either Black or Red or Orange, depending on the voltage of the Hot wire. See photos noted "according to seller" TBH I don't think the seller is entirely correct because although 220V Hot legs are standard for residential power in Europe and China, I am unaware of any single-Hot 208V power system anywhere in the world. You get 208V from two 120V Hot legs that are 120 degrees out of phase from each other. Theoretically you should be able to power this transformer at 240V or 208V in the USA without a Neutral by using two out-of-phase Hot wires, with one of the Hots going to the White wire on the transformer (see photos noted "UNTESTED"). However, your best option is to just wire the transformer for 120V whenever possible. As for the product, minus 2 stars for poor wiring instructions and plus one star for excellent customer service. The build quality looks and feels good. If they update their product photos and paper instructions with clear and simple wiring diagrams for supplying each voltage in the USA then I will give it 5 stars. Regardless, I would definitely buy from this seller again.

## Frequently Bought Together

- 24V 40VA Control Transformer， Primary 120, 208, 240V Secondary 24V Isolation Transformers，24V Transformer with Foot Mount for HVAC Furnace Multi Tap
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**Shop now:** [https://www.desertcart.nz/products/497110965-24v-40va-control-transformer-primary-120-208-240v-secondary-24v](https://www.desertcart.nz/products/497110965-24v-40va-control-transformer-primary-120-208-240v-secondary-24v)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-09*