---
product_id: 52784165
title: "DC 12V 20A Power Supply 240W Transformer Universal Regulated Switching Adaptor for 3D Printers LED Strip Lights CCTV Computer Project Security"
brand: "redrex"
price: "€ 67.18"
currency: EUR
in_stock: true
reviews_count: 13
category: "Redrex"
url: https://www.desertcart.fi/products/52784165-dc-12v-20a-power-supply-240w-transformer-universal-regulated-switching
store_origin: FI
region: Finland
---

# 12V 20A high output Low heat & silent operation Multi-layer protection DC 12V 20A Power Supply 240W Transformer Universal Regulated Switching Adaptor for 3D Printers LED Strip Lights CCTV Computer Project Security

**Brand:** redrex
**Price:** € 67.18
**Availability:** ✅ In Stock

## Summary

> ⚡ Power up your tech with silent strength and bulletproof safety!

## Quick Answers

- **What is this?** DC 12V 20A Power Supply 240W Transformer Universal Regulated Switching Adaptor for 3D Printers LED Strip Lights CCTV Computer Project Security by redrex
- **How much does it cost?** € 67.18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/52784165-dc-12v-20a-power-supply-240w-transformer-universal-regulated-switching)

## Best For

- redrex enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Comprehensive protections against short circuit, overload, and overvoltage keep your devices secure.
- • **Silent Efficiency:** Operates with minimal heat and zero noise—perfect for focused workspaces and professional environments.
- • **Built-in EMI Filter:** High anti-interference design guarantees clean power delivery and protects sensitive electronics.
- • **Universal Compatibility:** Dual AC input (100V-220V ±15%) adapts seamlessly to global power standards.
- • **Power Your Projects Reliably:** 240W regulated output ensures stable performance for 3D printers, LED strips, and CCTV setups.

## Overview

The Redrex DC 12V 20A 240W power supply is a universal regulated switching adaptor designed for demanding applications like 3D printer heatbeds, LED lighting, and security systems. Featuring dual voltage input, built-in EMI filtering, and multiple safety protections, it delivers stable, quiet, and efficient power tailored for professional-grade setups.

## Description

Redrex DC 12V 20A Power Supply 240W Transformer Universal Regulated Switching Adaptor for 3D Printers LED Strip Lights CCTV Computer Project Security : desertcart.co.uk: Electronics & Photo

Review: Slightly adjustable and perfect for a diesel heater. - Bought this for a diesel heater that can take up to 15a at 12v on start up and it has no problem , the resistor can adjust it no problem and I set it up to 12.8v using volt meter as the heater will cut out if it drops below 12 on start up and now at 12.8 it fires up no problem. I've had it a month now and with daily use as its getting cold here yea this thing is running the heater be it on low power after start its not failed yet , I've had other psu's from the same maker in 5v 20a versions that power my led strings and there's still going after 2 years , good product and seem to be great quality.
Review: Actually works! - I have bought a few of these and they seems to lose voltage under load. This one dropped by less than a volt at full load and was perfect for the job. It's probably twice the size of cheaper units and loooks very well made. You get what you pay for I guess.

## Features

- Protections: Short Circuit/Overload/Over voltage
- Dual input voltage : AC (100V/220V ±15%) ; Output: DC 12V 20A
- Low Heat, no annoying noise! IN-DOOR USE ONLY!
- Built-in EMI filter ,high anti-interference performance
- Widely used in industrial automation, LED display, communications, etc.Particularly useful for 3d printer heatbed power supply

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Specification met | CCC, CE, FCC |
| Item weight | 0.67 Kilograms |
| UPC | 605175675291 |
| Manufacturer | Redrex |
| Part number | RDX3D036 |
| Item Weight | 670 g |
| Product Dimensions | 4.78 x 11 x 4.78 cm; 670 g |
| Item model number | RDX3D036 |
| Size | 12V 20A |
| Voltage | 220 Volts |
| Wattage | 240 watts |
| Item Package Quantity | 1 |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Redrex
- **Power source:** Corded Electric
- **Product dimensions:** 4.8D x 11W x 4.8H centimetres
- **Mounting type:** Surface Mount
- **Current rating:** 20 Amps

## Images

![DC 12V 20A Power Supply 240W Transformer Universal Regulated Switching Adaptor for 3D Printers LED Strip Lights CCTV Computer Project Security - Image 1](https://m.media-amazon.com/images/I/71rvUBx-yPL.jpg)

## Questions & Answers

**Q: What power adaptor plug do you reccomend with this**
A: Standard 13 amp Plug : My Unit is used on Low Voltage LED lighting . The 20 amp relates to the
Output . V x A = W : ( 12 x 20 = 240 Watt Maximum ) : On the upstream side of the Transformer
and input voltage of 230/240 the amperage will equal 1 amp .
As you will note as  the voltage is reduced  the amperage increases and therefore need to take 
care when sizing the cable on the output side of the transformer . I.e if you elected to have just
1 circuit at full 20 amp load

**Q: is this 12v total (4v per channel) or 12v per channel?**
A: Its 12v per channel and 12v total voltage so you can run 10/12 cctv cameras if that helps

**Q: Can I use this power adapter with a dimmer switch & dimmable led strips?**
A: I don't see why not as the dimmer only controls the lamps, the supply shouldn't matter.

**Q: Silly question but though i know i need a plug, i assume i does come with the cord already fitted.**
A: No it doesn't come with a cord. Mine only lasted a few days before smoke poured out of it.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Slightly adjustable and perfect for a diesel heater.
*by D***S on 7 October 2024*

Bought this for a diesel heater that can take up to 15a at 12v on start up and it has no problem , the resistor can adjust it no problem and I set it up to 12.8v using volt meter as the heater will cut out if it drops below 12 on start up and now at 12.8 it fires up no problem. I've had it a month now and with daily use as its getting cold here yea this thing is running the heater be it on low power after start its not failed yet , I've had other psu's from the same maker in 5v 20a versions that power my led strings and there's still going after 2 years , good product and seem to be great quality.

### ⭐⭐⭐⭐⭐ Actually works!
*by T***R on 14 January 2025*

I have bought a few of these and they seems to lose voltage under load. This one dropped by less than a volt at full load and was perfect for the job. It's probably twice the size of cheaper units and loooks very well made. You get what you pay for I guess.

### ⭐⭐⭐⭐⭐ Excellent value psu
*by H***D on 4 May 2019*

Bought this to take the place of a hot and hummy old transformer-based psu for my car-type sub bass amplifier used in the home. Great improvement: cool running, steady voltage regulation (which you can adjust a bit if you want) and no RFI issues. More current: more thump!

## Frequently Bought Together

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-08*