---
product_id: 390982249
title: "12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module"
brand: "envistia"
price: "R515"
currency: ZAR
in_stock: true
url: https://www.desertcart.co.za/products/390982249-12v-to-3-3v-3a-step-down-waterproof-miniature-dc
store_origin: ZA
region: South Africa
---

# 3A max output current Fully waterproof epoxy sealed Compact 38x27x23mm size 12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module

**Brand:** envistia
**Price:** R515
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your innovation anywhere, rain or shine!

## Quick Answers

- **What is this?** 12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module by envistia
- **How much does it cost?** R515 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/390982249-12v-to-3-3v-3a-step-down-waterproof-miniature-dc)

## Best For

- envistia enthusiasts

## Why This Product

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

## Key Features

- • **Wide Input Range:** Operates seamlessly from 8V to 24V DC, perfect for versatile power setups
- • **Powerful 3A Output:** Delivers a stable 3.3V at up to 3 amps for demanding projects
- • **Waterproof Durability:** Epoxy-sealed housing ensures reliable performance in wet or harsh environments
- • **Smart Protection Suite:** Built-in overload, over-current, and voltage protections keep your devices safe
- • **Ultra-Compact & Lightweight:** At just 30g and pocket-sized, it fits effortlessly into any professional toolkit

## Overview

This miniature DC-DC step-down converter efficiently transforms 8-24V input into a stable 3.3V output at up to 3A (9W max). Fully epoxy-sealed for waterproof protection, it features smart overload and voltage safeguards, all packed into a compact 38x27x23mm, 30g module—ideal for professionals demanding reliable, portable power solutions.

## Description

This miniature DC-DC step-down converter module converts a 12V DC input to 3.3V DC output at up to 3A current (9W maximum).Specifications:Epoxy sealed waterproof housingLightweight, compact, convenient to use and transportNon-isolatedWith overload / over-current / over / low voltage protection, stable performanceAuto recoveryInput voltage: DC 12V nominal, will operate on any input voltage from 8V to 24V DCQuiescent input current (no load attached): <10mAMaximum input current at 3A output: Approximately 0.75A at 12V input, 0.6A at 15V inputOutput voltage: 3.3V DC (+2% -10%)Maximum output current: 3AMaximum Output Power: 9WEfficiency: >96%Size (L x W x H): 38 * 27 * 23 mm (Length including mounting tabs is 52mm)Weight: 30gCase color: White Cable length: 12cm (approx) Operating Notes:As with any DC-DC converter, the input DC power supply powering this converter must be capable of providing the maximum power drawn by your load. If the input supply is not capable of providing the power, the converter will fold back the output voltage as necessary. Example: If your load draws 3A at 3V (9W), and the input supply is only capable of providing 12V at 0.5A (6W), the maximum output voltage the converter will deliver is 2V (6W/3A).Package includes:1X 12V to 3V 3A Mini DC-DC Step Down Converter

## Features

- Converts a 12V input voltage (will operate with any input voltage from 8V to 24V) to 3.3V DC (+2% -10%) output at up to 3A
- Up to 9W output power (3V at 3A)
- Fully sealed and waterproof
- Overload / over-current / over / low voltage protection, stable performance
- The inputs and outputs are labeled on the sticker on top of the converter, the red and black wires are the + and - 12V input, and the red and yellow wires are the + and - 3V output.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Weight | 30 Grams |
| UPC | 732387204855 |
| Manufacturer | Chuangruifa |
| Country of Origin | USA |
| Model number | 3V 3A DC-DC Converter |
| Colour | White |
| Number of Memory Sticks | 1 |
| Item Weight | 30 g |
| Product Dimensions | 3.8 x 2.7 x 23 cm; 30 g |
| Item model number | 3V 3A DC-DC Converter |
| Item Height | 23 Centimeters |
| Item Width | 2.7 Centimeters |
| Wattage | 9 Watts |
| Are batteries included? | No |

## Product Details

- **Brand:** Envistia
- **Power Source:** Battery Powered
- **Product Dimensions:** 38D x 27W x 230H Millimeters
- **Mounting Type:** Chassis Mount
- **Current Rating:** 3 Amps

## Images

![12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module - Image 1](https://m.media-amazon.com/images/I/61QiTvq2r4L.jpg)
![12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module - Image 2](https://m.media-amazon.com/images/I/517-Z6YRM4L.jpg)
![12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module - Image 3](https://m.media-amazon.com/images/I/51Hnt0QzMPL.jpg)
![12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module - Image 4](https://m.media-amazon.com/images/I/61qvJxym-rL.jpg)
![12V to 3.3V 3A Step-Down Waterproof Miniature DC-DC Converter Power Supply Module - Image 5](https://m.media-amazon.com/images/I/41BAJaLgaOL.jpg)

## Questions & Answers

**Q: What guage are the wires?**
A: The manufacturer doesn't specify the wire gauge, but the wire conductor has a diameter of 1mm (0.04 inches), which would make it 18 AWG wire.

**Q: is this a switching DC-DC converter (or linear converter)?**
A: It's a switching converter. Power output at 3V is roughly equal to power input at 12V, so the input current is much lower than the output current. Minimal dissipation compared to a linear converter.

**Q: So, if i have a device that takes 3v .225a, even though this outputs a max of 3a it should work fine?**
A: Yes, absolutely. This module is voltage-regulated, meaning it regulates the output to 3V, and will provide whatever current the load draws, up to 3A maximum.

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-21*