--- product_id: 87544130 title: "DollaTek Small DC Buck Voltage Converter Step Down Voltage Regulator Module Board 4-38V to 1.25-36V 5V/12V Adjustable Output Voltage Stabilizer Transformer" brand: "dollatek" price: "€ 12.19" currency: EUR in_stock: true reviews_count: 13 category: "Dolla Tek" url: https://www.desertcart.be/products/87544130-dollatek-small-dc-buck-voltage-converter-step-down-voltage-regulator store_origin: BE region: Belgium --- # 5A max current output Adjustable 1.25-36V output Overheat & short-circuit protection DollaTek Small DC Buck Voltage Converter Step Down Voltage Regulator Module Board 4-38V to 1.25-36V 5V/12V Adjustable Output Voltage Stabilizer Transformer **Brand:** dollatek **Price:** € 12.19 **Availability:** ✅ In Stock ## Summary > ⚡ Power your projects with precision and confidence — don’t get left in the voltage dust! ## Quick Answers - **What is this?** DollaTek Small DC Buck Voltage Converter Step Down Voltage Regulator Module Board 4-38V to 1.25-36V 5V/12V Adjustable Output Voltage Stabilizer Transformer by dollatek - **How much does it cost?** € 12.19 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/87544130-dollatek-small-dc-buck-voltage-converter-step-down-voltage-regulator) ## Best For - dollatek enthusiasts ## Why This Product - Trusted dollatek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Safety Features:** Built-in overheat and short-circuit protection safeguards your devices and your peace of mind. - • **Robust 5A Power Handling:** Supports up to 5 amps with low ripple, ensuring stable and reliable performance for demanding projects. - • **Precision Voltage Control:** Continuously adjustable output voltage from 1.25V to 36V lets you tailor power delivery with surgical accuracy. - • **Compact & User-Friendly Design:** Miniature PCB mount with solderless wiring terminals and included heatsink fits seamlessly into any setup. - • **Integrated Voltmeter & LED Indicators:** Real-time input/output voltage monitoring with switchable display keeps you informed and in control. ## Overview The DollaTek Small DC Buck Voltage Converter is a compact, high-efficiency step-down regulator module supporting input voltages from 4V to 38V and adjustable output from 1.25V to 36V at up to 5A current. Featuring a built-in voltmeter, LED indicators, and robust safety protections, it delivers stable, low-ripple power ideal for electronics, industrial applications, and DIY projects. Its compact size and user-friendly design make it a must-have for professionals seeking reliable voltage regulation with real-time monitoring. ## Description Features:Input voltage: DC 4.0 ~ 38V Output voltage: DC 1.25V ~ 36V continuously adjustable ( the input voltage must be higher than the output voltage 1.5V ) Output current: max 5A, recommended for use in the 4.5A. Output power: up to 75W, more than 50W, Please enhance heat dissipation Voltmeter error: +/- 0.05V Measure range: 0 ~ 40V ( please ensure that the input voltage is 4.5V or more) Conversion efficiency: up to 96% Load regulation: S (I) ≤ 0.8% Voltage Regulation: S (u) ≤ 0.8% With overheat protection and short circuit protection Dimensions: 6.6 * 3.9 * 1.8cm Package include:1x DollaTek DC Step-down Module Review: Good regulation, decent power, voltage display is a bonus. - A handy device to step down and regulate power to a specific voltage. I have a couple providing 5.1V outputs from a variable 12-20V input which have been running continuously for about 6 months. I've recently bought another. The display is a handy addition. It can measure input or output voltage or can be switched off. The module has decent regulation, supplying steady voltage to fast transient loads which can be a problem with switched supplies. It's not running at maximum but at about 50% rated load keeps pretty cool with the provided stick-on heatsink. Review: Cheap and effective Buck converter - Bought this to provide power to some electronic items in a remote controlled aircraft. It does the job well and is compact enough that it fits perfectly inside the aircraft. I desoldered the connectors so that I could solder the wires to power it and take power from it, since weight in aircraft is key. As a cheap item it works perfectly, so no complaints. The LED display gives a fairly accurate indication of the output voltage too, but I used my digital multimeter to check the output was currect. ## Features - With power supply green LED indicator and the mini voltmeter which can be calibrated by adjusting potentiometer - High power of 5A and low ripple; has heatsink and copper pillar; Over-heating/short-circuit protection allows safe usage - Press the switch button to choose testing input/output voltage; "IN"LED light when testing input voltage; "OUT" LED light when testing output voltage - Press the left-side button to turn ON/OFF voltmeter; Wiring terminals makes convenient usage even without soldering iron - Adjust the potentiometer in clockwise direction for output voltage increase and decreasing output voltage in counter-clockwise direction ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07DK6WN63 | | Best Sellers Rank | 4,902 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 6 in Industrial Power Supply | | Brand | DollaTek | | Country Of Origin | China | | Current Rating | 5 Amps | | Current rating | 5 Amps | | Customer Reviews | 4.0 out of 5 stars 280 Reviews | | Item Dimensions D x W x H | 18D x 39W x 18H millimetres | | Item Weight | 0.02 Kilograms | | Manufacturer | DollaTek | | Minimum Frequency | 50 Hz | | Model Number | 742548985240 | | Mounting Type | PCB Mount | | Mounting type | PCB Mount | | Power Source | DC Voltage Input | | Power source | DC Voltage Input | | Product dimensions | 18D x 39W x 18H millimetres | | Specification Met | ETL, FCC, UL | | Specification met | ETL, FCC, UL | | UPC | 742548985240 | ## Product Details - **Brand:** DollaTek - **Current rating:** 5 Amps - **Mounting type:** PCB Mount - **Power source:** DC Voltage Input - **Product dimensions:** 18D x 39W x 18H millimetres ## Images ![DollaTek Small DC Buck Voltage Converter Step Down Voltage Regulator Module Board 4-38V to 1.25-36V 5V/12V Adjustable Output Voltage Stabilizer Transformer - Image 1](https://m.media-amazon.com/images/I/71b18vXk3rL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good regulation, decent power, voltage display is a bonus. *by J***W on 3 December 2025* A handy device to step down and regulate power to a specific voltage. I have a couple providing 5.1V outputs from a variable 12-20V input which have been running continuously for about 6 months. I've recently bought another. The display is a handy addition. It can measure input or output voltage or can be switched off. The module has decent regulation, supplying steady voltage to fast transient loads which can be a problem with switched supplies. It's not running at maximum but at about 50% rated load keeps pretty cool with the provided stick-on heatsink. ### ⭐⭐⭐⭐⭐ Cheap and effective Buck converter *by N***S on 28 September 2025* Bought this to provide power to some electronic items in a remote controlled aircraft. It does the job well and is compact enough that it fits perfectly inside the aircraft. I desoldered the connectors so that I could solder the wires to power it and take power from it, since weight in aircraft is key. As a cheap item it works perfectly, so no complaints. The LED display gives a fairly accurate indication of the output voltage too, but I used my digital multimeter to check the output was currect. ### ⭐ Does not work -DOA *by A***S on 16 January 2026* Product arrived DOA. It lights up but the small screw that is supposed to alter the output voltage does nothing rendering the item completely useless. Am returning to Amazon for refund. ## Frequently Bought Together - DollaTek Small DC Buck Voltage Converter Step Down Voltage Regulator Module Board 4-38V to 1.25-36V 5V/12V Adjustable Output Voltage Stabilizer Transformer - Yizhet 10 Pack Buck Converter DC to DC, High Efficiency Voltage Regulator, 3.0-40V to 1.5-35V, Adjustable Power Supply Module - AEDIKO 4pcs Relay Module DC 5V 1 Channel Relay Board with Optocoupler Isolation Support High or Low Level Trigger --- ## 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.be/products/87544130-dollatek-small-dc-buck-voltage-converter-step-down-voltage-regulator](https://www.desertcart.be/products/87544130-dollatek-small-dc-buck-voltage-converter-step-down-voltage-regulator) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-06-22*