--- product_id: 703182316 title: "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" brand: "wwzmdib" price: "247 zł" currency: PLN in_stock: false reviews_count: 5 category: "Wwzm Di B" url: https://www.desertcart.pl/products/703182316-wwzmdib-constant-current-cc-cv-buck-converter-module-dc-6 store_origin: PL region: Poland --- # 20A max output current 6-40V wide input voltage range Adjustable 1.2-36V output voltage 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 **Brand:** wwzmdib **Price:** 247 zł **Availability:** ❌ Out of Stock ## Summary > ⚡ Power your projects with precision and confidence—never settle for less! ## Quick Answers - **What is this?** 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 by wwzmdib - **How much does it cost?** 247 zł with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/703182316-wwzmdib-constant-current-cc-cv-buck-converter-module-dc-6) ## 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 - • **Heavy-Duty Build:** Large 30A screw terminals and high-frequency low-resistance capacitors deliver stable, low-ripple power with easy installation. - • **Robust Safety Features:** Instant short-circuit protection and stable constant current/voltage output ensure reliable, worry-free operation. - • **Precision Power Control:** Fine-tune voltage and current with dual potentiometers for exact output tailored to your project needs. - • **High-Efficiency Conversion:** Up to 96% efficiency thanks to advanced synchronous rectification technology—less heat, more power. - • **Versatile Application Ready:** Perfect for motors, LED displays, solar panels, battery charging, and industrial equipment—future-proof your power supply. ## Overview The WWZMDiB Constant Current CC CV Buck Converter Module is a high-performance, adjustable step-down voltage regulator supporting 6-40V input and delivering up to 20A output current at 1.2-36V. Featuring synchronous rectification for up to 96% efficiency, it offers precise voltage and current control, instant short-circuit protection, and robust build quality with large screw terminals. Ideal for powering motors, LEDs, battery charging, and industrial applications, this compact 300W module ensures stable, low-ripple output for professional-grade power management. ## 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: No hace nada. El voltaje simplemente pasa. Los potenciómetros para ajustar el voltaje de salida no hacen nada, e incluso el interruptor que está etiquetado como ON/OFF no hace nada Review: 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. ## Features - Application: Motors, audio, monitor, LED car display, air conditioner, fans, solar energy, photovoltaic energy, DVD, LED lights, pumps, industrial equipment appliances, etc. - wide input voltage range from 6V to 40V, the step-down converter can accurately adjust output voltage and current. The efficiency can be up to 95%,(measured at 20A, converting 24V to 12V). - Short Circuit Protection: Self-recovery(cannot short circuit for long time). Plus, when input and output is common grounded, no-load CV output constant voltage,CC output constant current - Adopting 75V / 80A large current dual MOS tube designed step-down board, Input and output use high frequency low resistance electrolytic capacitor, low ripple, and gives a stable output. Large current 30A connection screw terminals, more convenient to install ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0B825HRB9 | | Are batteries included? | No | | Colour | multicolor | | Customer Reviews | 3.8 3.8 out of 5 stars (63) | | Date First Available | 19 June 2024 | | Generic Name | Constant Current CC CV Buck Converter Module | | Item Weight | 91 g | | Item model number | W-08-13 | | Manufacturer | WWZMDiB | | Model number | W-08-13 | | Number of Memory Sticks | 1 | | Package Dimensions | 9.19 x 6.91 x 3.91 cm; 91 g | | 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 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/31WGJHjhJVL.jpg) ![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 - Image 2](https://m.media-amazon.com/images/I/41TqU4cc50L.jpg) ![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 - Image 3](https://m.media-amazon.com/images/I/512A-hfEmaL.jpg) ![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 - Image 4](https://m.media-amazon.com/images/I/51H8azNnEXL.jpg) ![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 - Image 5](https://m.media-amazon.com/images/I/51K-+7v3-XL.jpg) ## Customer Reviews ### ⭐ Review *by T***. on 8 March 2025* No hace nada. El voltaje simplemente pasa. Los potenciómetros para ajustar el voltaje de salida no hacen nada, e incluso el interruptor que está etiquetado como ON/OFF no hace nada ### ⭐⭐⭐⭐⭐ Review *by A***R on 5 August 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. ### ⭐ Review *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.pl/products/703182316-wwzmdib-constant-current-cc-cv-buck-converter-module-dc-6](https://www.desertcart.pl/products/703182316-wwzmdib-constant-current-cc-cv-buck-converter-module-dc-6) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-04-26*