--- product_id: 472867904 title: "Constant Current CC CV Buck Converter Module DC 6-40V to 1.2-36V 20A 300W Adjustable Step Down Voltage Regulator Power Supply Module with Short Circuit Protection Function" brand: "wwzmdib" price: "479556₫" currency: VND in_stock: true reviews_count: 2 category: "Wwzm Di B" url: https://www.desertcart.vn/products/472867904-constant-current-cc-cv-buck-converter-module-dc-6-40v store_origin: VN region: Vietnam --- # 300W max power output 20A max output current Adjustable 1.2-36V output voltage Constant Current CC CV Buck Converter Module DC 6-40V to 1.2-36V 20A 300W Adjustable Step Down Voltage Regulator Power Supply Module with Short Circuit Protection Function **Brand:** wwzmdib **Price:** 479556₫ **Availability:** ✅ In Stock ## Summary > ⚡ Power your projects like a pro — efficiency meets precision! ## Quick Answers - **What is this?** Constant Current CC CV Buck Converter Module DC 6-40V to 1.2-36V 20A 300W Adjustable Step Down Voltage Regulator Power Supply Module with Short Circuit Protection Function by wwzmdib - **How much does it cost?** 479556₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/472867904-constant-current-cc-cv-buck-converter-module-dc-6-40v) ## 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 - • **Precision Power Control:** Seamlessly switch between constant current and constant voltage modes for tailored power delivery. - • **Compact & Versatile Design:** Small 60x53x30mm footprint fits effortlessly into any professional workspace or custom setup. - • **Robust 20A Output Capacity:** Handles demanding loads with ease—perfect for high-power LED drives and battery charging. - • **Built-In Short Circuit Protection:** Instantaneous safety feature guards your devices and investments from unexpected faults. - • **High-Efficiency Synchronous Rectification:** Up to 96% conversion efficiency reduces heat and energy waste, keeping your projects cool and green. ## Overview The WWZMDiB Constant Current CC CV Buck Converter Module is a compact, high-performance DC/DC step-down regulator supporting input voltages from 6 to 40V and adjustable output from 1.2 to 36V. Delivering up to 20A and 300W, it features advanced synchronous rectification technology for up to 96% efficiency, constant current and voltage modes, and built-in short circuit protection—ideal for professional-grade LED driving, battery charging, and renewable energy applications. ## 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: Product quality is not good - Potentiometers don’t do incremental changes. Power LED doesn’t discharge. I don’t have a great experience. Review: Not working. - Not working ## 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 | #7,237 in Electronics ( See Top 100 in Electronics ) #139 in International Power Adapters | | Brand | WWZMDiB | | Brand Name | WWZMDiB | | Current Rating | 20 Amps | | Current rating | 20 Amps | | Customer Reviews | 3.8 out of 5 stars 67 Reviews | | Item Type Name | Constant Current CC CV Buck Converter Module | | Item Weight | 0.09 Kilograms | | Item weight | 0.09 Kilograms | | Manufacturer | WWZMDiB | | Maximum Frequency | 150 KHz | | Minimum Frequency | 50 Hz | | Model | W-08-13 | | Mounting Type | Rack Mount | | Mounting type | Rack Mount | | Power Source | dc | | Power source | dc | | Specification Met | CE, ETL, FCC, RoHS, UL | | Specification met | CE, ETL, FCC, RoHS, UL | | UPC | 618202520747 | | Unit Count | 1 Count | ## Product Details - **Brand:** WWZMDiB - **Current rating:** 20 Amps - **Mounting type:** Rack Mount - **Power source:** DC power supply - **Specification met:** CE, ETL, FCC, RoHS, UL ## Images ![Constant Current CC CV Buck Converter Module DC 6-40V to 1.2-36V 20A 300W Adjustable Step Down Voltage Regulator Power Supply Module with Short Circuit Protection Function - Image 1](https://m.media-amazon.com/images/I/71jOAIHC+iL.jpg) ## Customer Reviews ### ⭐ Product quality is not good *by K***N on 15 March 2026* Potentiometers don’t do incremental changes. Power LED doesn’t discharge. I don’t have a great experience. ### ⭐ Not working. *by B***T on 21 November 2025* Not working ## Frequently Bought Together - WWZMDiB Constant Current CC CV Buck Converter Module DC 6-40V to 1.2-36V 20A 300W Adjustable Step Down Voltage Regulator Power Supply Module with Short Circuit Protection Function - Digital Low Voltage Protector Disconnect Switch Cut Off 12V Over-Discharge Protection Module for 12-36V Lead Acid Lithium Battery Low Voltage Cutoff for Solar Panel Lighting System Camper - TICONN Waterproof Electrical Junction Box IP67 ABS Plastic Enclosure with Hinged Cover with Mounting Plate, Wall Brackets, Cable Glands (Clear, 5.9"x5.9"x3.5") --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/472867904-constant-current-cc-cv-buck-converter-module-dc-6-40v](https://www.desertcart.vn/products/472867904-constant-current-cc-cv-buck-converter-module-dc-6-40v) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-04-25*