--- product_id: 331208210 title: "4PCS AC/DC to DC Step Down Buck Converter AC 5-30V DC 5-48V 24V 36V 48V to DC 2.5-35V 12V Voltage Regulator Board 2A Adjustable Volt Power Supply Module" brand: "umlife" price: "€ 26.84" currency: EUR in_stock: true reviews_count: 10 category: "Umlife" url: https://www.desertcart.sk/products/331208210-4pcs-ac-dc-to-dc-step-down-buck-converter-ac store_origin: SK region: Slovakia --- # 50V max input voltage Compact 51x26mm size 3A peak output current 4PCS AC/DC to DC Step Down Buck Converter AC 5-30V DC 5-48V 24V 36V 48V to DC 2.5-35V 12V Voltage Regulator Board 2A Adjustable Volt Power Supply Module **Brand:** umlife **Price:** € 26.84 **Availability:** ✅ In Stock ## Summary > ⚡ Step down in size, step up in power — voltage control made sleek! ## Quick Answers - **What is this?** 4PCS AC/DC to DC Step Down Buck Converter AC 5-30V DC 5-48V 24V 36V 48V to DC 2.5-35V 12V Voltage Regulator Board 2A Adjustable Volt Power Supply Module by umlife - **How much does it cost?** € 26.84 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/331208210-4pcs-ac-dc-to-dc-step-down-buck-converter-ac) ## Best For - umlife enthusiasts ## Why This Product - Trusted umlife brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Efficient Heat Management:** External radiator design ensures cool operation under heavy use - • **Plug-and-Play Versatility:** Includes 4 modules with clear silk-screened terminals for easy installation - • **Built to Handle High Voltage:** Supports up to 50V input, perfect for diverse AC/DC sources - • **Reliable High Current Delivery:** Stable 2.2A continuous output with 3A peak for demanding loads - • **Power Your Projects with Precision:** Adjustable output voltage from 3.3V to 33V for ultimate control ## Overview The UMLIFE 4PCS AC/DC to DC Step Down Buck Converter set features four compact LM2596HV modules capable of converting input voltages from 5V to 50V AC/DC down to a finely adjustable 3.3V to 33V DC output. Designed for professional-grade projects, each module delivers a stable 2.2A continuous current with short bursts up to 3A, supported by an external heat sink for efficient thermal management. Clear silk-screened terminals simplify installation, making this set ideal for millennial managers and tech-savvy professionals seeking reliable, customizable power regulation solutions. ## Description Product description Parameters Input voltage range: AC 5V-30V, DC 5V-50V Output output range: DC 3.3V-33V Output current range: up to 2.2A (the regulator chip can withstand a maximum current of 3A, can work at 3A output current for a short time Module size: 51mm*26mm Package：4pcs LM2596HV AC/DC to DC Buck Converter Module 3v 3.3V 5V 6V 9V 12V 15V 24V DC 5V-50V Adjustable Step-Down 3A LM2596 Power Supply Features A: The power module adopts the plug-in LM2596HV, the high voltage version of the LM2596. The maximum input voltage is 50V (limited by the filter capacitor withstand voltage). The external heat sink can withstand high current operation. The input terminal uses a 4A rectifier bridge stack to input AC power, and has a dedicated DC input port, which is commonly used for AC and DC input. The output voltage can be adjusted from 3.3V to 33V, and the output voltage will vary with different input voltage ranges. B： Input AC voltage AC5V-AC30V or DC5V-50V, due to the large fluctuation of AC voltage, the recommended AC voltage range has reserved margin. The power module has a maximum input voltage of 50V (limited by the filter capacitor withstand voltage) and a heat sink. The output current can work stably at 2.2A output current for a long time, and can work at 3A output current for a short time. The front of the PCB has the name of the silk screen terminal, and the back side also has the name of the silk screen terminal. When soldering the lead, please recognize it and solder it to prevent damage. Review: Great product! - Works great! After realizing the pot adjustment was backwards from my expectations. Counterclockwise increases output voltage. I have 24ac coming in and 12dc coming out. Review: Great!! - Great device. I used it to convert 24V AC down to approximately 7.5V DC to properly control the modulating hot gas reheat valve on this condensing unit. ## Features - 4PCS LM2596HV AC/DC to DC Buck Step Down Converter Module 3v 3.3V 5V 6V 9V 12V 15V 24V DC 5V-50V Adjustable Step-Down 3A Power Supply - Adjustable AC/DC to DC buck converter power supply module Voltage Regulator - Input ac voltage AC5V~AC30V or dc5v-50v. Due to the large fluctuation of ac voltage, the recommended ac voltage range has been reserved. - The power module adopts plug-in LM2596HV, LM2596 version of high voltage, the highest input voltage is 50V(limited by filter capacitor voltage) with external radiator, can withstand high current work. - Input voltage range: AC 5V-30V, DC 5V-50V Output output range: DC 3.3V-33V ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B094ZTG5S8 | | Best Sellers Rank | #109,082 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #404 in Power Converters | | Brand | UMLIFE | | Color | 4 PCS | | Customer Reviews | 4.1 out of 5 stars 161 Reviews | | Input Voltage | 50 Volts | | Item Weight | 3.84 Ounces | | Manufacturer | UMLIFE | | Model Number | 701715466395 | | Number of Outlets | 4 | | Output Voltage | 33 Volts | | Plug Format | Type A | | Plug Type | Type A | | Power Source | Dc Power Supply | | UPC | 701715466395 | | Unit Count | 4.0 Count | ## Product Details - **Brand:** UMLIFE - **Color:** 4 PCS - **Input Voltage:** 50 Volts - **Item Weight:** 3.84 Ounces - **Output Voltage:** 33 Volts ## Images ![4PCS AC/DC to DC Step Down Buck Converter AC 5-30V DC 5-48V 24V 36V 48V to DC 2.5-35V 12V Voltage Regulator Board 2A Adjustable Volt Power Supply Module - Image 1](https://m.media-amazon.com/images/I/71WT5ASrcBS.jpg) ## Questions & Answers **Q: Need 5vdc out, input varies 7-15vac...will it regulate at 5vdc out or will it be proportional to varying 7-15 input** A: They are very precise about the output. I used on with 12 v input and 5v output for an arduino. When I connected it to 24v - still, exactly 5v! **Q: Will this modual go from 12v ac in to 3v dc out ?** A: Yes **Q: Is there a UL Listing for this?** A: You don’t need one. If you’re going to embed this into a system then the system gets UL approval. That’s the point of an embedded system. **Q: Can this convert 24v ac to 24v dc or will there be a drop across the device?** A: This conversion broad has worked great for me. My demands are not great , I can get the DC voltages I need. I recommend! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great product! *by J***2 on September 14, 2025* Works great! After realizing the pot adjustment was backwards from my expectations. Counterclockwise increases output voltage. I have 24ac coming in and 12dc coming out. ### ⭐⭐⭐⭐⭐ Great!! *by F***Z on February 16, 2026* Great device. I used it to convert 24V AC down to approximately 7.5V DC to properly control the modulating hot gas reheat valve on this condensing unit. ### ⭐⭐⭐⭐⭐ Works well enough to power an ESP32 dev board from 24VAC *by S***K on November 15, 2023* After reading the reviews, I carefully inspected mine for any manufacturing defects, and it seemed well enough put together (none of the components were on very straight, but everything is there and the solder joints look solid). I put a small load on it (1k resistor, I think) and clipped my volt meter to it and applied a ~12VDC voltage to the input lines (since I only have DC on my bench). It came up around 4 volts by default, so I cranked the potentiometer a few turns -- it's multiple turns per volt, so very precise -- until it read 5.00 volts, and there it stayed over a wide range of (DC) inputs. Later I connected it to an ESP32 dev board, and the hot end to 24VAC, and powered it up. Despite totally different input and load, it still read 4.99 volts so I gave it the tiniest tweak and now it reads 5.00 every time I check it. I also checked it recently on a little oscilloscope and if there's any ripple it's not visible to the eye against the 5 volt displacement. So, no complaints at all, other than that it's a little bulkier than I probably need for my application. (I'm running the ESP32 w/wifi, and up to 6 relays on it; no problem.) I will update this review if it fails; if I haven't, assume it's still working. It's on 24/7 from the date of this review. (Now what to do with the other 3... Sprinkler controller?) ## Frequently Bought Together - UMLIFE 4PCS AC/DC to DC Step Down Buck Converter AC 5-30V DC 5-48V 24V 36V 48V to DC 2.5-35V 12V Voltage Regulator Board 2A Adjustable Volt Power Supply Module - HiLetgo 2pcs 5V One Channel Relay Module Relay Switch with OPTO Isolation High Low Level Trigger - ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects --- ## 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.sk/products/331208210-4pcs-ac-dc-to-dc-step-down-buck-converter-ac](https://www.desertcart.sk/products/331208210-4pcs-ac-dc-to-dc-step-down-buck-converter-ac) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-06-18*