---
product_id: 534150606
title: "12v to 4.2v Converter DC Step Down Buck Voltage Regulator DC Transformer Power Supply 3A 12.6W Waterproof Car Converter Compatible with Led Light Car Truck Boat"
brand: "fbhdzvv"
price: "€ 20.98"
currency: EUR
in_stock: true
reviews_count: 9
category: "Fbhdzvv"
url: https://www.desertcart.be/products/534150606-12v-to-4-2v-converter-dc-step-down-buck-voltage
store_origin: BE
region: Belgium
---

# 3A output current 12.6W power output Multi-layer protection system 12v to 4.2v Converter DC Step Down Buck Voltage Regulator DC Transformer Power Supply 3A 12.6W Waterproof Car Converter Compatible with Led Light Car Truck Boat

**Brand:** fbhdzvv
**Price:** € 20.98
**Availability:** ✅ In Stock

## Summary

> 🔌 Power up smart, stay protected, and never miss a beat!

## Quick Answers

- **What is this?** 12v to 4.2v Converter DC Step Down Buck Voltage Regulator DC Transformer Power Supply 3A 12.6W Waterproof Car Converter Compatible with Led Light Car Truck Boat by fbhdzvv
- **How much does it cost?** € 20.98 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/534150606-12v-to-4-2v-converter-dc-step-down-buck-voltage)

## Best For

- fbhdzvv enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Compatibility:** Seamlessly powers LED lights, dashcams, car audio, solar panels, and more—your all-in-one power solution.
- • **Smart Auto-Protection Tech:** Integrated microprocessor safeguards against overvoltage, overcurrent, short circuits, and overheating.
- • **High-Efficiency 12.6W Output:** Maximize energy use with up to 97% conversion efficiency, reducing heat and waste.
- • **Reliable 3A Current Delivery:** Power your devices with a steady 3 amps output, perfect for demanding electronics.
- • **Rugged Waterproof Aluminum Case:** Built to withstand harsh environments—ideal for cars, trucks, boats, and outdoor gear.

## Overview

This 12V to 4.2V DC step-down buck converter delivers a robust 3A current and 12.6W power output with 90-97% efficiency. Encased in a waterproof aluminum shell with silicone sealing, it’s engineered for durability in tough environments. Featuring intelligent microprocessor controls, it offers comprehensive protection against voltage spikes, current overloads, short circuits, and overheating. Perfect for powering automotive and marine electronics like LED lights, dashcams, and audio systems, it ensures reliable, efficient energy conversion wherever you go.

## Description

Input voltage: DC 12V Output voltage: DC 4.2V Output current: 3A Output power: 12.6W Case material:Aluminum Voltage protection: Input overvoltage and undervoltage protection Overcurrent protection: YES Output line compensation: YES Short circuit protection: YES Over temperature protection: YES Conversion efficiency: 90%~97% Wiring: Input: Red wire: input + Black wire: input - Output: Yellow wire: output + Black wire: output - Package include: 1 x DC 12v to 4.2v step down buck converter

Review: Enough juice for Tx on a Baofeng UV-5R radio - It is working great powering a Baofeg UV-5R radio from a 12 Volt power source. This allows me to have the radio permanently powered without worrying of the traditional lithium battery that requires constant recharge. It has enough power to supply current for transmit mode.
Review: Great product,small so can be mounted near or on your motorcycle battery - Wired it to use with my heated motorcycle jacket seems to work fine.Wired directly to my battery with on/off switch and a 7.5amp fuse. Product is good to use with limited space near or on your battery

## Features

- 12V- 4.2V dc converter power supply input voltage DC 12V; output voltage DC 4.2V; output current 3A; output power 12.6W.
- DC-DC 12v to 4.2v car power converter intelligent microprocessing chip, over voltage, over current, over temperature, short circuit, it can be auto protection, and can work in normal condition when restored.
- 12V to 4.2V dc converter car power voltage aluminum case and silicone sealed design make it suitable for use in various harsh environments, high conversion efficiency, low heat generation, good heat dissipation, more durable.
- 12v to 4.2v DC step down buck converter compatible with car audio, car LED display, car DVD,hard disk player,dashcam,solar panel,LED strip lights,LED display,electric fan,camera,light.
- Attention: Please install according to the the label strictly, positive pole and nagative pole can't be reversed, or the module and device might be damaged, to assure this converter has the sufficient voltage and power pls make sure the voltage and power input is enough.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09ZT5TXJT |
| Best Sellers Rank | #264,769 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,112 in Power Converters |
| Brand | FBHDZVV |
| Brand Name | FBHDZVV |
| Current Rating | 3 Amps |
| Customer Reviews | 4.4 out of 5 stars 129 Reviews |
| Manufacturer | FBHDZVV |
| Model | 62ea7b5a-4d8b-4178-b3eb-b97a5901f1bf |
| Part Number | 176466 |
| Power Source | Dc Power Supply |
| Specification Met | CE, RoHS, UL |
| UPC | 731905685923 |

## Product Details

- **Brand:** FBHDZVV
- **Power Source:** Corded Electric
- **Current Rating:** 3 Amps
- **UPC:** 731905685923
- **Manufacturer:** FBHDZVV

## Images

![12v to 4.2v Converter DC Step Down Buck Voltage Regulator DC Transformer Power Supply 3A 12.6W Waterproof Car Converter Compatible with Led Light Car Truck Boat - Image 1](https://m.media-amazon.com/images/I/51y-a56jDUL.jpg)
![12v to 4.2v Converter DC Step Down Buck Voltage Regulator DC Transformer Power Supply 3A 12.6W Waterproof Car Converter Compatible with Led Light Car Truck Boat - Image 2](https://m.media-amazon.com/images/I/610BEypjftL.jpg)
![12v to 4.2v Converter DC Step Down Buck Voltage Regulator DC Transformer Power Supply 3A 12.6W Waterproof Car Converter Compatible with Led Light Car Truck Boat - Image 3](https://m.media-amazon.com/images/I/61QHGSuhElL.jpg)
![12v to 4.2v Converter DC Step Down Buck Voltage Regulator DC Transformer Power Supply 3A 12.6W Waterproof Car Converter Compatible with Led Light Car Truck Boat - Image 4](https://m.media-amazon.com/images/I/71aesCOefdL.jpg)
![12v to 4.2v Converter DC Step Down Buck Voltage Regulator DC Transformer Power Supply 3A 12.6W Waterproof Car Converter Compatible with Led Light Car Truck Boat - Image 5](https://m.media-amazon.com/images/I/61KydQ-VZNL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Enough juice for Tx on a Baofeng UV-5R radio
*by J***O on April 25, 2025*

It is working great powering a Baofeg UV-5R radio from a 12 Volt power source. This allows me to have the radio permanently powered without worrying of the traditional lithium battery that requires constant recharge. It has enough power to supply current for transmit mode.

### ⭐⭐⭐⭐⭐ Great product,small so can be mounted near or on your motorcycle battery
*by S***I on July 2, 2025*

Wired it to use with my heated motorcycle jacket seems to work fine.Wired directly to my battery with on/off switch and a 7.5amp fuse. Product is good to use with limited space near or on your battery

### ⭐⭐⭐⭐⭐ WORKS GREAT!
*by V***C on April 28, 2025*

I use this reducer on my 2000 ZX 6R Kawasaki to make the CDI box function property with my cheap Chinese aftermarket ignition. It is a great inexpensive way to replace the overpriced factory OEM ignition. I even tested it with a very sensitive voltmeter and it is exactly on point as advertise 7.4.

## Frequently Bought Together

- 12v to 4.2v Converter DC Step Down Buck Voltage Regulator DC Transformer Power Supply 3A 12.6W Waterproof Car Converter Compatible with Led Light Car Truck Boat
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*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-07-24*