---
product_id: 240815473
title: "Queta 6 Pieces LM2596s DC to DC Buck Converter Step Down Voltage Regulator Power Module 3.2-40V to 1.25-35V 3A High Efficiency DC Voltage Stabilizer Volt Transformer LM2596 DC-DC Buck Converter"
brand: "queta"
price: "63.27 DT"
currency: TND
in_stock: true
reviews_count: 9
category: "Queta"
url: https://www.desertcart.tn/products/240815473-queta-6-pieces-lm2596s-dc-to-dc-buck-converter-step
store_origin: TN
region: Tunisia
---

# 3.2-40V input range 92% max efficiency 1.25-35V adjustable output Queta 6 Pieces LM2596s DC to DC Buck Converter Step Down Voltage Regulator Power Module 3.2-40V to 1.25-35V 3A High Efficiency DC Voltage Stabilizer Volt Transformer LM2596 DC-DC Buck Converter

**Brand:** queta
**Price:** 63.27 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your projects smarter, not harder!

## Quick Answers

- **What is this?** Queta 6 Pieces LM2596s DC to DC Buck Converter Step Down Voltage Regulator Power Module 3.2-40V to 1.25-35V 3A High Efficiency DC Voltage Stabilizer Volt Transformer LM2596 DC-DC Buck Converter by queta
- **How much does it cost?** 63.27 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/240815473-queta-6-pieces-lm2596s-dc-to-dc-buck-converter-step)

## Best For

- queta enthusiasts

## Why This Product

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

## Key Features

- • **Robust 3A Output Current:** Delivers stable current up to 3A, ideal for demanding electronics
- • **Precision Voltage Control:** Continuously adjustable output from 1.25V to 35V to fit any project need
- • **Proven Reliability & Quality:** Each module undergoes 2-hour aging test with premium Sanyo capacitors for ultra-low ripple
- • **Wide Input Voltage Flexibility:** Supports 3.2V to 40V DC input for versatile power sources
- • **High-Efficiency Power Conversion:** Up to 92% efficiency minimizes heat and energy waste

## Overview

The Queta LM2596 DC-DC Buck Converter is a high-efficiency, adjustable step-down voltage regulator module designed for professional-grade electronics projects. It supports a broad input voltage range of 3.2V to 40V and outputs a finely tunable voltage between 1.25V and 35V with up to 3A current capacity. Engineered with premium components and rigorous testing, it ensures stable, low-ripple power delivery with up to 92% conversion efficiency, making it a must-have for millennial tech innovators seeking reliable and customizable power solutions.

## Description

Description:Module nature: non-isolated buck (BUCK)Rectification method: non-synchronous rectificationInput voltage: 3.2V-40VOutput voltage: 1.25V-35VOutput current: 3A (maximum)Conversion efficiency: 92% (maximum)Switching frequency: 65KHzOutput ripple: 30mV (maximum)Load regulation: ±0.5%Voltage adjustment rate: ±2.5%Working temperature: -40 to +85Peripheral size: 43*21*14 (length * width * height) (mm)Features:1.The module uses high-quality LM2596 chip, high efficiency (maximum 92%), low heat generation, and can easily bring 3A (short-term) current. It is recommended to use current within 2A for long-term work, and add a heat sink (above 10W) Output).2.This module uses the original Sanyo filter capacitor with low ESR, which can make the ripple voltage as low as 30mV, which is completely comparable to the linear power supply!3.This module uses machine placement, reflow soldering, and each module undergoes a two-hour aging test before shipment to ensure high reliability.​ Wiring: 1. Soldering, directly solder the power cord to the input (output) port2. Welding pins can be used by inserting pins through lead wires or inserting into holes on the board; or soldering the PCB directly after adding pins.

Review: Great DC converter! ( Includes tips for new users ) - These Queta DC-DC Buck converters work great! All six of the DC converter modules I received today performed exactly as expected. When the output is set to 3 volts, their output voltage only sagged about 10 mV when drawing a half amp, so they are regulating the output voltage pretty well under load. A WORD OF CAUTION to people who are not used to working with these buck converters - it may seem at first like they are not working correctly. When you first take them out of the package, they are typically set for maximum output, so the DC input and output voltages will probably be the same. So this means that initially you should NOT hook up the device you intend to power with this buck converter. You MUST first set the output of the module to the desired output voltage level, before you connect your device to it, or you could potentially FRY the unit that you were intending to power this converter with! When you power the module up, set the DC input voltage to the buck converter to somewhere between 7 to 14 volts DC. Using a jeweler's screwdriver, turn the small brass screw on the blue trimpot about 10 turns counter-clockwise. Assuming you are monitoring the module's output with a DC multimeter, after you surpass 9 to 10 turns of the trimpot you should start to see the output voltage drop. Now adjust the trimpot until you reach the intended DC output level. For a 3W "star type" high power LED, this could be about 3 volts. For an Arduino Uno, it might be around 6V > 7V. One other thing you might want to check before permanently wiring the module to your intended load device. With the converter module powered up, monitor the DC output voltage to make sure that when you connect your device to the output, make sure that the output voltage does not "sag" too much. If the voltage drops by more than say ~ 30 to 100 mV when you connect your load device, there might be a problem .... otherwise it is probably working just fine.
Review: So far so good. Stable output voltage, but a little inefficient. - Used the first of these to power a Raspberry Pi 4 with LCD screen, which kept reporting low voltage using a 5v supply with plenty of capacity. Problem was that powering the RPi4 through the LCD screen resulted in a slight voltage drop, and the RPi4 was getting a touch under 5v (and is VERY picky). Used this to run it from my 3D printers 24v power-supply with an output voltage of 5.15v, which has been completely stable. I even tested running it from my bench power supply and changing the input voltage pretty widely, from 18-26v and the output was still pretty stable. I've since used another one of these for powering other devices when I need two voltages from my single output bench power supply. (e.g.: 12v and 5v or 5v & 3.3v etc), and has been reliable (over a short time thus far). My only gripe is that they do get a little toasty when running and are a little less efficient than should be possible with the LM2596 regulator (though at the in/out voltages I've been using even the datasheet rating isn't exactly great efficiency ... these were just a bit below that rating). An extra heatsink on the regulator chip may help, and depending on your application some forced airflow might be a good idea in any sort of enclosed space.

## Features

- INPUT VOLTAGE RANGE: DC 3.2V to 40V (The input voltage must be 1.5V higher than the output voltage
- OUTPUT VOLTAGE RANGE: DC 1.25V to 35V continuously adjustable voltage, Maximum output current is 3A.
- HIGH EFFICIENCY: Output with high power conversion efficiency up to 92%. Measured 12V input, 5V output current, 1A load regulation rate is less than 1%.
- USE STEPS: Connect the power supply (3-40V), the power indicator light is on, and the module is working normally; adjust the blue potentiometer knob (usually turn clockwise to boost, counterclockwise to turn down) and use a multimeter to monitor the output voltage until it reaches the required voltage.This module can be used to debug a variety of system operating voltage ranges.
- REQUIRES ATTENTION:It is recommended to use the current within 2.5A for long-term work, and add the scattered Hot plate (output above 10W); because it is a step-down module, in order to ensure stable output, please keep a small 1.5V differential pressure

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08G4GYNL6 |
| Best Sellers Rank | #779,618 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #3,645 in Power Converters |
| Brand | Queta |
| Color | As Shown |
| Customer Reviews | 4.6 out of 5 stars 169 Reviews |
| Input Voltage | 35 volts |
| Item Dimensions | 0.55 x 0.83 x 0.55 inches |
| Item dimensions L x W x H | 0.55 x 0.83 x 0.55 inches |
| Manufacturer | Queta |
| Mfr Part Number | 6577943-4428-1059579511 |
| Model Number | 6577943-4428-1059579511 |
| Number of Items | 6 |
| Output Voltage | 12 volts, 5 volts |
| Power Source | Corded Electric, Battery Powered |
| UPC | 884139086452 |
| Unit Count | 6 Count |

## Product Details

- **Brand:** Queta
- **Current Rating:** 3 Amps
- **Mounting Type:** PCB Mount
- **Power Source:** Corded Electric, Battery Powered
- **Product Dimensions:** 0.55"D x 0.83"W x 0.55"H

## Images

![Queta 6 Pieces LM2596s DC to DC Buck Converter Step Down Voltage Regulator Power Module 3.2-40V to 1.25-35V 3A High Efficiency DC Voltage Stabilizer Volt Transformer LM2596 DC-DC Buck Converter - Image 1](https://m.media-amazon.com/images/I/61RkqDJFjCL.jpg)
![Queta 6 Pieces LM2596s DC to DC Buck Converter Step Down Voltage Regulator Power Module 3.2-40V to 1.25-35V 3A High Efficiency DC Voltage Stabilizer Volt Transformer LM2596 DC-DC Buck Converter - Image 2](https://m.media-amazon.com/images/I/611U-iCtr+L.jpg)
![Queta 6 Pieces LM2596s DC to DC Buck Converter Step Down Voltage Regulator Power Module 3.2-40V to 1.25-35V 3A High Efficiency DC Voltage Stabilizer Volt Transformer LM2596 DC-DC Buck Converter - Image 3](https://m.media-amazon.com/images/I/519kJAuo7pL.jpg)
![Queta 6 Pieces LM2596s DC to DC Buck Converter Step Down Voltage Regulator Power Module 3.2-40V to 1.25-35V 3A High Efficiency DC Voltage Stabilizer Volt Transformer LM2596 DC-DC Buck Converter - Image 4](https://m.media-amazon.com/images/I/61wD-dXtIRL.jpg)
![Queta 6 Pieces LM2596s DC to DC Buck Converter Step Down Voltage Regulator Power Module 3.2-40V to 1.25-35V 3A High Efficiency DC Voltage Stabilizer Volt Transformer LM2596 DC-DC Buck Converter - Image 5](https://m.media-amazon.com/images/I/41llVRxS9kL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great DC converter! ( Includes tips for new users )
*by L***C on August 15, 2022*

These Queta DC-DC Buck converters work great! All six of the DC converter modules I received today performed exactly as expected. When the output is set to 3 volts, their output voltage only sagged about 10 mV when drawing a half amp, so they are regulating the output voltage pretty well under load. A WORD OF CAUTION to people who are not used to working with these buck converters - it may seem at first like they are not working correctly. When you first take them out of the package, they are typically set for maximum output, so the DC input and output voltages will probably be the same. So this means that initially you should NOT hook up the device you intend to power with this buck converter. You MUST first set the output of the module to the desired output voltage level, before you connect your device to it, or you could potentially FRY the unit that you were intending to power this converter with! When you power the module up, set the DC input voltage to the buck converter to somewhere between 7 to 14 volts DC. Using a jeweler's screwdriver, turn the small brass screw on the blue trimpot about 10 turns counter-clockwise. Assuming you are monitoring the module's output with a DC multimeter, after you surpass 9 to 10 turns of the trimpot you should start to see the output voltage drop. Now adjust the trimpot until you reach the intended DC output level. For a 3W "star type" high power LED, this could be about 3 volts. For an Arduino Uno, it might be around 6V > 7V. One other thing you might want to check before permanently wiring the module to your intended load device. With the converter module powered up, monitor the DC output voltage to make sure that when you connect your device to the output, make sure that the output voltage does not "sag" too much. If the voltage drops by more than say ~ 30 to 100 mV when you connect your load device, there might be a problem .... otherwise it is probably working just fine.

### ⭐⭐⭐⭐⭐ So far so good. Stable output voltage, but a little inefficient.
*by L***E on May 24, 2023*

Used the first of these to power a Raspberry Pi 4 with LCD screen, which kept reporting low voltage using a 5v supply with plenty of capacity. Problem was that powering the RPi4 through the LCD screen resulted in a slight voltage drop, and the RPi4 was getting a touch under 5v (and is VERY picky). Used this to run it from my 3D printers 24v power-supply with an output voltage of 5.15v, which has been completely stable. I even tested running it from my bench power supply and changing the input voltage pretty widely, from 18-26v and the output was still pretty stable. I've since used another one of these for powering other devices when I need two voltages from my single output bench power supply. (e.g.: 12v and 5v or 5v & 3.3v etc), and has been reliable (over a short time thus far). My only gripe is that they do get a little toasty when running and are a little less efficient than should be possible with the LM2596 regulator (though at the in/out voltages I've been using even the datasheet rating isn't exactly great efficiency ... these were just a bit below that rating). An extra heatsink on the regulator chip may help, and depending on your application some forced airflow might be a good idea in any sort of enclosed space.

### ⭐⭐⭐⭐⭐ works
*by N***2 on June 1, 2026*

works

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-04*