---
product_id: 251859310
title: "16.5V 40VA Burglar Alarm Systems and Doorbell Transformer,16.5V Plug in Transformer Compatible with All Versions of Doorbell ，Most Security Panels"
brand: "wuyelin"
price: "30982CFA"
currency: XOF
in_stock: true
url: https://www.desertcart.sn/products/251859310-16-5v-40va-burglar-alarm-systems-and-doorbell-transformer-16
store_origin: SN
region: Senegal
---

# 16.5V Output 120VAC Input Easy Install 16.5V 40VA Burglar Alarm Systems and Doorbell Transformer,16.5V Plug in Transformer Compatible with All Versions of Doorbell ，Most Security Panels

**Brand:** wuyelin
**Price:** 30982CFA
**Availability:** ✅ In Stock

## Summary

> 🔒 Secure Your Home with Confidence!

## Quick Answers

- **What is this?** 16.5V 40VA Burglar Alarm Systems and Doorbell Transformer,16.5V Plug in Transformer Compatible with All Versions of Doorbell ，Most Security Panels by wuyelin
- **How much does it cost?** 30982CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/251859310-16-5v-40va-burglar-alarm-systems-and-doorbell-transformer-16)

## 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

- • **Safe & Reliable:** Auto-resetting fused secondary for peace of mind.
- • **LED Power Indicator:** Always know your system is powered.
- • **Power Up Your Security:** Say goodbye to underpowered doorbells!
- • **Universal Compatibility:** Works seamlessly with major brands.
- • **User-Friendly Installation:** Screw terminals for hassle-free setup.

## Overview

The 16.5V 40VA Burglar Alarm Systems and Doorbell Transformer is a robust solution designed to replace outdated transformers, ensuring your security systems and doorbells operate at optimal power levels. With a 120VAC input and a reliable 16.5V output, this transformer is compatible with a variety of alarm systems and video doorbells, making it a versatile choice for modern homes. Its easy installation process and built-in safety features make it a must-have for any security setup.

## Description

16.5V 40VA Burglar Alarm Systems and Doorbell Transformer,16.5V Plug in Transformer Compatible with All Versions of Doorbell ，Most Security Panels

## Features

- ➡︎ Easily Replace your Old Transformer - Plug in Alarm System Transformer for your Security System
- ➡SPECIFICATION: input voltage: 120 VAC, 60Hz; Output voltage: 16.5V, 40VA SAFE AND STABLE auto-resetting (PTC) fused secondary, LED green power indicator
- ➡ELIMINATATE DOORBELL UNDER POWER HASSEL:16.5V 40VA plug in transformer, replaces and upgrades underpowered transformer with this 16.5V AC transformer, offering plenty of power for your doorbells
- ➡Compatible With: This transformer compatible for Honeywell Ademco, DSC, ETC Burglar Alarm Systems; Also compatible with Video Doorbell, Video Doorbell 2, Video Doorbell Pro, Nest Skybell Doorbell，Note: The brand above is only for demonstrating compatibilityyy
- ➡ Easy to install:Output with screw terminals, simple wiring。The load voltage(when the doorbell is running) is 16.5V and the output of no-load voltage by a multimeter to test is about 18.5-19.5V, normal function and won’t affect any use.When testing the product, pay attention to use an AC voltmeter or a multimeter to test the output voltage value and use a voltage tester to measure the accurate voltage output data.

## Product Details

- **Brand:** WUYELIN
- **Power Source:** AC
- **Product Dimensions:** 2.1"D x 2.5"W x 3.8"H
- **Mounting Type:** Wall Mount
- **Current Rating:** 2.24 Amps

## Images

![16.5V 40VA Burglar Alarm Systems and Doorbell Transformer,16.5V Plug in Transformer Compatible with All Versions of Doorbell ，Most Security Panels - Image 1](https://m.media-amazon.com/images/I/61WGI9DdiXL.jpg)

## Questions & Answers

**Q: Why does the voltage drop to 6V when hot?  It works fine for a few minutes then drop when it get hot and could not deliver enough voltage to charge.**
A: The high temperature becomes hot, indicating that the PTC inside the transformer has started the temperature protection function. The transformer will not work again until the temperature cools down after the protection function is started
Are you overloaded?

**Q: Can this be used on a 16 volt system?**
A: sure ,this transformer output is 16-16.5v 40va

**Q: Can this be used to replace a 16 volt unit**
A: I would check with the manufacture minimum voltage requirements.  It may work, but with limited results.  I would replace with the transformer that was installed with the system.

**Q: Can i use this transformer to replace my existing honeywell 1321transformer 25va to power my vista20p panel and envisalink evl-4ezr?**
A: Hello, 
The Honeywell 1321 supplies 16.5 VAC (Volts AC) just like this one. The Honeywell transformer can only supply 25 VA (volts times amps) whereas this transformer can supply 40 VA. That means that it has more capacity to spare compared to the Honeywell, so it will power the equipment just fine. Short answer: YES. :)

## Frequently Bought Together

- 16.5V 40VA Burglar Alarm Systems and Doorbell Transformer,16.5V Plug in Transformer Compatible with All Versions of Doorbell ，Most Security Panels
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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-05*