--- product_id: 97166192 title: "3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty]" brand: "goldsource" price: "235 zł" currency: PLN in_stock: false reviews_count: 8 url: https://www.desertcart.pl/products/97166192-3000w-st-pro-auto-step-up-and-step-down-voltage store_origin: PL region: Poland --- # 3000W max load capacity Auto step-up & step-down voltage 4 versatile AC outlets + USB port 3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] **Brand:** goldsource **Price:** 235 zł **Availability:** ❌ Out of Stock ## Summary > ⚡ Power your global lifestyle with zero hassle! ## Quick Answers - **What is this?** 3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] by goldsource - **How much does it cost?** 235 zł with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/97166192-3000w-st-pro-auto-step-up-and-step-down-voltage) ## Best For - goldsource enthusiasts ## Why This Product - Trusted goldsource brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Backed by a 3-year warranty and designed for reliable, quiet operation in any setting. - • **Soft-Start Technology:** Prevents circuit breaker trips with a gentle power surge start every time. - • **Powerhouse Performance:** Handles up to 3000W for heavy-duty appliances without breaking a sweat. - • **Universal Compatibility:** Equipped with US, Universal, and Schuko outlets plus a 5V USB port for all your gadgets. - • **Seamless Voltage Switching:** Auto step-up and step-down function ensures your devices run smoothly anywhere. ## Overview The Goldsource 3000W ST-Pro Voltage Transformer Converter is a heavy-duty, CE-certified device designed for professional and home use. It supports auto step-up and step-down voltage conversion between 110V and 220V, featuring four AC outlets (US standard, Universal, Schuko) and a 5V USB port. With a robust 3000W maximum load capacity and built-in soft-start circuit, it ensures stable, safe power delivery for high-demand appliances like rice cookers, blenders, and vacuum cleaners. Compact yet powerful, it comes with a 3-year warranty, making it an essential tool for millennial professionals who value versatility and reliability in their tech gear. ## Description Product description Goldsource 3000W Transformer Review: Works just fine - It's a bit bulkier than I would like but given the wattage it supports, I can deal with the thing sitting on the kitchen floor. I've already used it with all my 220v appliances and they all function normally. I used my Panasonic rice cooker and rice was cooked with no issue in 50min. I used it with the electric kettle and the toaster and both did their jobs as before. I also vacuumed the entire apartment with my Dyson canister without any issue. It was quiet without any unusual noise or humming during usage. It is quite versatile with both step-up and step-down functions but I seriously doubt I would ever need it to step down from 220v to 110v. The separate power input sockets are clearly marked for 110v or 220v. Since this is sold in the US, it only comes with a US plug power cord. For those looking to use it for step-down, you'll have to find a cord with the plug type you need. There are two 110 outlets and two 220 outlets with one being universal (fit my UK type plugs) and one three-prong type (not sure what it is). The strap on top makes it easy if you do need to move it around. For under $120 it's a pretty good deal as it enables me to use my existing appliances, especially the Panasonic and Dyson without having to buy new ones, which will cost me way more than $120. Update Feb 2023: After 3 years of continuous usage with vacuum cleaner, rice cooker, electric kettle, and toaster, it finally started having problems. It starts to emit burning smell while using with the kettle and the vacuum. There is no fume nor the unit is excessively hot. However, on the safe side, it's time for a new one. Review: Soild piece if equipment. - Works very well.. Be careful of the weird combo multi adapter plug that will allow 220vac and 110vac to work on the same plug. I'll never understand why that is not a code violation. ## Features - ★EASY START FUNCTION: This premium and highly functional transformer converter has a soft-start circuit is built inside to prevent an inrush current at the starting moment. Home circuit breaker not trip off at the starting moment. It comes with four input voltages selectable: 110V/200V/220V/240V. - ★HIGHLY FUNCTIONAL CONVERTER: This CE Certified step-up and step-down AC voltage transformer has the ability to convert from 110V up to 220V or from 200/220/240V down to 110V. (Please note a voltage converter does NOT change the frequency, in another word, what goes in is what comes out, either 50 Hz or 60Hz) - ★BEST EFFECTIVE TRANFORMER CONVERTER: Unlike other converters, we have designed this one with 3,000 watts Maximum Load Capacity (MLC), most suitable and cost-effective for devices such as rice cookers, hot water pots, household food mixers, blenders with the Maximum Power Consumption (MPC) between 1050 and 2250 watts. - ★QUALITY STABLE OUTPUT CONSUMPTION: This voltage transformer has 100% loading capacity. It has 4 AC outlets including two 110V US standard, one 220V Universal and one German/French Schuko plus one DC 5V USB which makes it work perfectly well. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07KGMK47S | | Best Sellers Rank | #492,229 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,229 in Power Converters | | Brand | Goldsource | | Brand Name | Goldsource | | Customer Reviews | 4.3 out of 5 stars 183 Reviews | | EU Spare Part Availability Duration | 3 Years | | Manufacturer | Goldsource | | Maximum Frequency | 60 Hz | | Minimum Frequency | 50 Hz | | Model | ST-Pro 3000W | | Mounting Type | Plug Mount | | Part Number | ST | | Power Source | Corded Electric | ## Product Details - **Brand:** Goldsource - **Manufacturer:** Goldsource - **Mounting Type:** Plug Mount - **Power Source:** Corded Electric ## Images ![3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] - Image 1](https://m.media-amazon.com/images/I/61oyq4ePV0L.jpg) ![3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] - Image 2](https://m.media-amazon.com/images/I/71RpUY7Q23L.jpg) ![3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] - Image 3](https://m.media-amazon.com/images/I/71pVV27WqOL.jpg) ![3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] - Image 4](https://m.media-amazon.com/images/I/61aT-kwYK3L.jpg) ![3000W ST-Pro Auto Step Up & Step Down Voltage Transformer Converter, Heavy-Duty AC 110/220V Converter with US Standard, Universal, Schuko AC Outlets & DC 5V USB Port by Goldsource [3-Year Warranty] - Image 5](https://m.media-amazon.com/images/I/81DxYoA1KyL.jpg) ## Questions & Answers **Q: In countries with 220 v ac, is it safe to use this 3000 w 50 hz step up & step down converter to my keurig coffee maker 1470 w 60 hz 120 v ac?** A: The problem is that most countries will not have circuit breakers That could take 3000 W draw when you initially turn on this unit. That was the exact problem I had in Tel Aviv. Every time I plugged in the unit and switched it on it popped the circuit breakers in my house. I would do research but I wouldn’t go above 1500 W max to run a coffee maker. **Q: I need 12.5 amps (3000w) 240vac output. By my math, that's a 25 amp input of 120vac which exceeds my 15 amp input circuit - is that right?** A: Yes **Q: On the 3000w model does it have terminals to connect bare wire on 120v input? From the pictures it shows a 15 amp 3-prong plug, it needs 30a** A: Yes it does **Q: Will this work with a 120V 1050W espresso machine in Australia?** A: I don’t think so. I’ve uses it for an European espresso machine with similar specks and it failed after a few days. I think you need at least 3000W to 5000W ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works just fine *by I***C on May 17, 2019* It's a bit bulkier than I would like but given the wattage it supports, I can deal with the thing sitting on the kitchen floor. I've already used it with all my 220v appliances and they all function normally. I used my Panasonic rice cooker and rice was cooked with no issue in 50min. I used it with the electric kettle and the toaster and both did their jobs as before. I also vacuumed the entire apartment with my Dyson canister without any issue. It was quiet without any unusual noise or humming during usage. It is quite versatile with both step-up and step-down functions but I seriously doubt I would ever need it to step down from 220v to 110v. The separate power input sockets are clearly marked for 110v or 220v. Since this is sold in the US, it only comes with a US plug power cord. For those looking to use it for step-down, you'll have to find a cord with the plug type you need. There are two 110 outlets and two 220 outlets with one being universal (fit my UK type plugs) and one three-prong type (not sure what it is). The strap on top makes it easy if you do need to move it around. For under $120 it's a pretty good deal as it enables me to use my existing appliances, especially the Panasonic and Dyson without having to buy new ones, which will cost me way more than $120. Update Feb 2023: After 3 years of continuous usage with vacuum cleaner, rice cooker, electric kettle, and toaster, it finally started having problems. It starts to emit burning smell while using with the kettle and the vacuum. There is no fume nor the unit is excessively hot. However, on the safe side, it's time for a new one. ### ⭐⭐⭐⭐⭐ Soild piece if equipment. *by B***S on January 9, 2026* Works very well.. Be careful of the weird combo multi adapter plug that will allow 220vac and 110vac to work on the same plug. I'll never understand why that is not a code violation. ### ⭐⭐⭐⭐⭐ Very pleased *by T***R on August 11, 2020* This put out the power and doesn't get very hot. I haven't hooked it up to a meter to measure it's actual power efficiency yet. I am using it to run a 1600W 240V heater. Normally you want at least double head room when using a power transformer with a heater. I.e. a 1600W heater should have a 3200W transformer. Yet this doesn't even get hot. It is very easy to use, even without an owners manual as all the outlets and ports are clearly marked. Even the 2 fuse ports have the fuse size printed beneath them. I couldn't be happier with this! :-) --- ## 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/97166192-3000w-st-pro-auto-step-up-and-step-down-voltage](https://www.desertcart.pl/products/97166192-3000w-st-pro-auto-step-up-and-step-down-voltage) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-20*