---
product_id: 476220437
title: "WWZMDiB CC CV Buck Converter DC 6-40V to 1.2-35V 20A 300W Power Supply Step Down Module for Solar Energy, Photovoltaic Energy, Industrial Equipment"
brand: "wwzmdib"
price: "€ 17.10"
currency: EUR
in_stock: true
reviews_count: 8
category: "Wwzm Di B"
url: https://www.desertcart.pt/products/476220437-wwzmdib-cc-cv-buck-converter-dc-6-40v-to-1
store_origin: PT
region: Portugal
---

# 20A max current 1.2-35V adjustable output 96% efficiency with synchronous rectification WWZMDiB CC CV Buck Converter DC 6-40V to 1.2-35V 20A 300W Power Supply Step Down Module for Solar Energy, Photovoltaic Energy, Industrial Equipment

**Brand:** wwzmdib
**Price:** € 17.10
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your projects smarter, cooler, and stronger with WWZMDiB’s ultimate buck converter!

## Quick Answers

- **What is this?** WWZMDiB CC CV Buck Converter DC 6-40V to 1.2-35V 20A 300W Power Supply Step Down Module for Solar Energy, Photovoltaic Energy, Industrial Equipment by wwzmdib
- **How much does it cost?** € 17.10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/476220437-wwzmdib-cc-cv-buck-converter-dc-6-40v-to-1)

## Best For

- wwzmdib enthusiasts

## Why This Product

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

## Key Features

- • **High Current Capacity:** Supports up to 20A max output current, ideal for high-power LED drives and battery charging demands.
- • **Compact & Robust Design:** Lightweight 85g module with built-in short-circuit protection, ready to integrate seamlessly into your power systems.
- • **Cutting-Edge Efficiency:** Synchronous rectification tech slashes energy loss, delivering up to 96% conversion efficiency and cooler operation.
- • **Precision Power Control:** Dual CC/CV modes ensure your devices get exactly the current or voltage they need—no more, no less.
- • **Wide Input & Output Range:** Handles DC 6-40V input and outputs a finely tunable 1.2-35V, perfect for diverse industrial and renewable energy setups.

## Overview

The WWZMDiB CC CV Buck Converter is a high-performance DC/DC step-down module designed for professional-grade solar, battery charging, and industrial applications. Featuring synchronous rectification technology, it delivers up to 20A current and 300W power with exceptional 96% efficiency. Its wide input voltage range (6-40V) and adjustable output (1.2-35V) provide versatile, precise power control in a compact 85g package, complete with essential protections for reliable, long-term use.

## Description

Synchronous rectification technology introduction:Synchronous rectification is a new technology that uses special power MOSFETs with extremely low on-state resistance to replace rectifier diodes to reduce rectification losses. It can greatly improve the efficiency of the DC/DC converter and there is no dead-time voltage caused by the Schottky barrier voltage. Power MOSFET is a voltage-controlled device, and its volt-ampere characteristics are linear when it is turned on. When using a power MOSFET as a rectifier, the gate voltage must be synchronized with the phase of the rectified voltage to complete the rectification function, so it is called synchronous rectification. Synchronous rectification technology greatly reduces the rectification loss at the output end of the switching power supply, thereby improving the conversion efficiency and reducing the heat of the power supply itself.Parameter Description:Module properties: synchronous rectification, non-isolated buck, constant current and constant voltage module, CC CV charging moduleScope of application: high-power LED constant current drive, lithium battery charging (including ferroelectric), 4V, 6V, 12V, 14V, 24V battery charging, NiCd NiMH battery (battery pack) charging, solar panels, wind turbinesInput voltage: DC6-40VOutput voltage: continuously adjustable (1.2-35VDC) for a long time below 32V (suitable for applications where the input voltage is higher than the output voltage and cannot be boosted)Output current: maximum 20A within 15A for a long time (please add a fan for heat dissipation if the temperature of the power tube exceeds 65 degrees, and use derating for high voltage output)Current limiting range: 0.2-20A (adjustment) If the module exceeds 65 degrees, please add a fan.Minimum dropout voltage: 3VWorking frequency: 150KHZConversion efficiency: up to about 96% The efficiency is related to the pressure difference and the use environmentOutput ripple: about 50mV ripple (no noise) 20M bandwidth (for reference only) input 24V measuredOperating temperature: -10℃ to +75℃) (Please pay attention to the temperature of the power tube in actual use, if the temperature is too high, please strengthen the heat dissipation or derate the use)Potentiometer adjustment direction: clockwise (increase), counterclockwise (decrease)Output short-circuit protection: yes (instantaneous protection) constant current (currently set constant current value cannot be short-circuited for a long time)Input reverse polarity protection: none,Output anti-backflow: none, for self-charged or inductive loads, an external 2-pole tube is required!Wiring method: terminal blockModule size: 60*53*30MMNet weight: about 85 gramsOutput current adjustment method:1. Adjust the CV potentiometer and set the output voltage to the voltage value you need according to your load requirements.2. Set the CC potentiometer counterclockwise for about 30 turns (that is, set the output current to the minimum), connect the LED, and adjust the CC potentiometer to the current you need. For battery charging, after the battery is fully discharged, connect to the output and adjust the CC to the current you need. The more, the smaller the charging current.) Wiring Instructions:OUT+: output positiveOUT-: output negative+IN: input positive-IN: Enter a negative numberCV: Output Voltage RegulationCC: output current regulationEN: Enable, low level closes output; Pause, high voltage level activeWhen the input and output are grounded, no-load CV output constant voltage, CC output constant current

Review: Buck converter - Works as advertised. No issues with reducing voltage. Would bye again. Great product!
Review: I got a replacement that WORKS! 😄 - First one sent to me was erratic and the adjusters did not work. After a few minutes of adjusting it started smoking. Requested a replacement and the replacement works! Feels like a score when you can get questionable to poor electronic quality from you know what country. I'm happy for the price. Expect duds if u can tolerate the hassle of exchanges.

## Features

- Constant current mode (CC): Output does not exceed the set voltage limit
- Constant voltage mode (CV): Output does not exceed the set current limit
- Input voltage: DC 6-40V. Output voltage: DC 1.2-35V (recommended within 30V)
- Output Current: MAX 20A (recommended within 15A)
- Output Power: MAX 300W (For high power, please add a fan for cooling)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B825HRB9 |
| Best Sellers Rank | #257,279 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,070 in Power Converters |
| Brand | WWZMDiB |
| Brand Name | WWZMDiB |
| Current Rating | 20 Amps |
| Customer Reviews | 3.9 out of 5 stars 64 Reviews |
| Item Type Name | Constant Current CC CV Buck Converter Module |
| Item Weight | 0.09 Kilograms |
| Manufacturer | WWZMDiB |
| Maximum Frequency | 150 KHz |
| Minimum Frequency | 50 Hz |
| Model | W-08-13 |
| Mounting Type | Rack Mount |
| Power Source | Battery Powered |
| Specification Met | CE, ETL, FCC, RoHS, UL |
| UPC | 618202520747 |

## Product Details

- **Brand:** WWZMDiB
- **Current Rating:** 20 Amps
- **Mounting Type:** Rack Mount
- **Power Source:** Battery Powered
- **Specification Met:** CE, ETL, FCC, RoHS, UL

## Images

![WWZMDiB CC CV Buck Converter DC 6-40V to 1.2-35V 20A 300W Power Supply Step Down Module for Solar Energy, Photovoltaic Energy, Industrial Equipment - Image 1](https://m.media-amazon.com/images/I/71jOAIHC+iL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Buck converter
*by E***. on December 20, 2025*

Works as advertised. No issues with reducing voltage. Would bye again. Great product!

### ⭐⭐⭐⭐ I got a replacement that WORKS! 😄
*by M***K on September 21, 2024*

First one sent to me was erratic and the adjusters did not work. After a few minutes of adjusting it started smoking. Requested a replacement and the replacement works! Feels like a score when you can get questionable to poor electronic quality from you know what country. I'm happy for the price. Expect duds if u can tolerate the hassle of exchanges.

### ⭐⭐⭐⭐⭐ Great value and it works
*by A***R on August 5, 2025*

Works great. A proprietary battery for a device I have died, so I used this attached to a big 12v DC battery to simulate the exact voltage and amperage that the broken battery provided and it works perfectly. Very good value for money.

## Frequently Bought Together

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-02-03*