---
product_id: 183925109
title: "40 Watt Low Voltage Xenon Transformer 40W in Input 120V to Output 12V Halogen Light Bulb Power Supply 12 Volt G4 MR11 MR16 Lamp Driver Ballast Spot Landscape Rail Ceiling Wiring Malibu Garden"
brand: "12vmonster"
price: "$43.32"
currency: USD
in_stock: true
reviews_count: 8
category: "12 Vmonster"
url: https://www.desertcart.us/products/183925109-40-watt-low-voltage-xenon-transformer-40w-in-input-120v
store_origin: US
region: United States of America
---

# 40W true wattage output 120V input to 12V output Short circuit protection 40 Watt Low Voltage Xenon Transformer 40W in Input 120V to Output 12V Halogen Light Bulb Power Supply 12 Volt G4 MR11 MR16 Lamp Driver Ballast Spot Landscape Rail Ceiling Wiring Malibu Garden

**Brand:** 12vmonster
**Price:** $43.32
**Availability:** ✅ In Stock

## Summary

> 💡 Power your space quietly and confidently with the 40W Xenon Transformer—small size, big impact!

## Quick Answers

- **What is this?** 40 Watt Low Voltage Xenon Transformer 40W in Input 120V to Output 12V Halogen Light Bulb Power Supply 12 Volt G4 MR11 MR16 Lamp Driver Ballast Spot Landscape Rail Ceiling Wiring Malibu Garden by 12vmonster
- **How much does it cost?** $43.32 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/183925109-40-watt-low-voltage-xenon-transformer-40w-in-input-120v)

## Best For

- 12vmonster enthusiasts

## Why This Product

- Trusted 12vmonster brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Silent Operation:** Eliminates annoying hums common in older transformers, ensuring a peaceful ambiance in your living or workspaces.
- • **Compact Powerhouse:** Delivers a guaranteed 40W true wattage in a sleek 2.75" x 1.18" x 1" form factor—no bulky transformers here.
- • **Smart Safety Features:** Includes short circuit protection and requires a minimum 10W load, making it an ideal, safe replacement for outdated halogen transformers.
- • **Seamless Voltage Conversion:** Effortlessly converts standard 120V North American input to a stable 12V output, perfect for all low voltage halogen bulbs.
- • **Built to Last with Confidence:** Backed by a 2-year extended warranty, offering peace of mind and reliable performance for your lighting setup.

## Overview

The 12Vmonster 40 Watt Low Voltage Xenon Transformer is a compact, reliable power supply designed to convert 120V input to a consistent 12V output for halogen lighting systems. Featuring true 40W output, short circuit protection, and silent operation, it’s an ideal upgrade for modern low voltage lighting with a 2-year warranty ensuring durability and peace of mind.

## Description

A power supply for your Halogen Spot Lights low voltage transformer for all your AC 12 Volt needs Perfect for accent lighting in any location inside your home, kitchen , bathroom, bedroom, hallway . etc

Review: Worked fine to replace much older technology -- and eliminated the hum! - I have only had this for a short period, but it replaced a much larger (huge!) and much heavier transformer and seems to work fine! I'm not an electrical expert, so I don't know what technology magic reduced the weight and size of a transformer with these specifications. I'm hoping that the magic does not result in a shorter lifespan (the old one lasted a long time, maybe 25 years?). And as a bonus, the old transformer produced an annoying hum; this one does not!
Review: ok - follow wiring diagram

## Features

- PREMIUM QUALITY ELECTRONIC TRANSFORMER FOR ANY LOW VOLTAGE 12 VOLT BULB - Consistent and reliable line voltage converter to power your 12V lighting systems.
- 100% 40 WATT TRUE WATTAGE OUTPUT IN COMPACT SIZE: 2.75" X 1.18" X 1.00" - Don't be fooled by the high wattage "ratings" of other power cheap power supplies, we guarantee our wattage
- INPUT 120V NORTH AMERICAN VOLTAGE / OUTPUT LOW VOLTAGE 12 VOLT - Short Circuit Protection
- 2 YEAR EXTENDED WARRANTY - Buy with confidence and peace of mind from 12Vmonster
- MINIMUM 10W LOAD FOR POWER - Ideal replacement for old halogen transformers

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07TVKPLD3 |
| Best Sellers Rank | #146,624 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #291 in Lighting Low Voltage Transformers |
| Brand | 12Vmonster |
| Brand Name | 12Vmonster |
| Customer Reviews | 4.2 out of 5 stars 228 Reviews |
| Item Dimensions D x W x H | 2.75"D x 2.75"W x 2.75"H |
| Manufacturer | 12Vmonster |
| Mounting Type | Ceiling Mount |
| Power Source | Xenon |
| Product Dimensions | 2.75"D x 2.75"W x 2.75"H |

## Product Details

- **Brand:** 12Vmonster
- **Power Source:** Xenon
- **Product Dimensions:** 2.75"D x 2.75"W x 2.75"H
- **Mounting Type:** Ceiling Mount
- **Manufacturer:** 12Vmonster

## Images

![40 Watt Low Voltage Xenon Transformer 40W in Input 120V to Output 12V Halogen Light Bulb Power Supply 12 Volt G4 MR11 MR16 Lamp Driver Ballast Spot Landscape Rail Ceiling Wiring Malibu Garden - Image 1](https://m.media-amazon.com/images/I/71ffo63KmoL.jpg)

## Available Options

This product comes in different **Wattage** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Worked fine to replace much older technology -- and eliminated the hum!
*by R***R on January 3, 2026*

I have only had this for a short period, but it replaced a much larger (huge!) and much heavier transformer and seems to work fine! I'm not an electrical expert, so I don't know what technology magic reduced the weight and size of a transformer with these specifications. I'm hoping that the magic does not result in a shorter lifespan (the old one lasted a long time, maybe 25 years?). And as a bonus, the old transformer produced an annoying hum; this one does not!

### ⭐⭐⭐⭐⭐ ok
*by J***T on February 19, 2026*

follow wiring diagram

### ⭐⭐⭐⭐ NOT UL/CSA/CE marked
*by A***R on January 5, 2026*

One star deducted for no safety certs -- come on, Amazon, you should be insisting on that as a minimum. That said, it *just* fits in a 4" box (tabs don't quite line up). Installed and working. Wire color coding was non-standard, red for line and white for DC output. It's powering four 20 watt halogen under cabinet lamps (80W) so it should be operating well below its maximum rating. Will update after a few weeks of use.

## Frequently Bought Together

- 40 Watt Low Voltage Xenon Transformer 40W in Input 120V to Output 12V Halogen Light Bulb Power Supply 12 Volt G4 MR11 MR16 Lamp Driver Ballast Spot Landscape Rail Ceiling Wiring Malibu Garden
- 60 Watt Halogen Electronic Potted Transformer 120 Volt in-Out / 12 Volt Output Auto Restart Soft Start Short Circuit Protected with Auto Restart

---

## 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/183925109-40-watt-low-voltage-xenon-transformer-40w-in-input-120v](https://www.desertcart.us/products/183925109-40-watt-low-voltage-xenon-transformer-40w-in-input-120v)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-27*