--- product_id: 227740909 title: "Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty]" brand: "goldsource" price: "€ 91.38" currency: EUR in_stock: false reviews_count: 9 url: https://www.desertcart.at/products/227740909-goldsource-3000w-st-pro-auto-step-up-and-step-down store_origin: AT region: Austria --- # 3000W max load DC 5V USB port Universal AC outlets Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty] **Brand:** goldsource **Price:** € 91.38 **Availability:** ❌ Out of Stock ## Summary > Transform Your Power Game! ⚡ ## Quick Answers - **What is this?** Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty] by goldsource - **How much does it cost?** € 91.38 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/227740909-goldsource-3000w-st-pro-auto-step-up-and-step-down) ## 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 - • **🚀 Easy Operation:** Built-in soft-start circuit prevents inrush current, ensuring smooth startup. - • **💡 High Efficiency:** Achieves 90%-95% efficiency with a lightweight, portable toroidal transformer. - • **🔧 Upgraded Design:** Enhanced US socket & universal compatibility for all your devices. - • **🏠 Ideal for Home Use:** Perfect for high-demand appliances like rice cookers, mixers, and more. - • **🌍 Versatile Voltage Selection:** Choose from 4 input voltages: 110V, 200V, 220V, 240V. ## Overview The Goldsource 3000W ST Pro+ Voltage Transformer is an upgraded, heavy-duty converter designed for seamless voltage conversion between 110V and 220V. With universal AC outlets, a DC 5V USB port, and a robust 3000-watt capacity, it’s perfect for powering a variety of household appliances efficiently and safely. ## Description Goldsource 3000W Transformer Goldsource 3000W Transformer Goldsource 3000W Transformer ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B08DG6Y9F9 | | Best Sellers Rank | #954,668 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #4,388 in Power Converters | | Brand Name | Goldsource | | Current Rating | 3 A | | Customer Reviews | 3.9 3.9 out of 5 stars (33) 3.9 out of 5 stars | | Manufacturer | Goldsource | | Maximum Frequency | 60 hertz | | Minimum Frequency | 50 hertz | | Model | ST Pro+ | | Mounting Type | Surface Mount | | Part Number | ST pro+ | | Power Source | Corded Electric | | Specification Met | FCC, UL | ## Product Details - **Brand:** Goldsource - **Current Rating:** 3 Amps - **Mounting Type:** Surface Mount - **Power Source:** Corded Electric - **Specification Met:** FCC, UL ## Images ![Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty] - Image 1](https://m.media-amazon.com/images/I/617e8Fln-EL.jpg) ![Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty] - Image 2](https://m.media-amazon.com/images/I/51wbOKOcjOL.jpg) ![Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty] - Image 3](https://m.media-amazon.com/images/I/71NtnGOB7qL.jpg) ![Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty] - Image 4](https://m.media-amazon.com/images/I/71Sl5aVn8ML.jpg) ![Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty] - Image 5](https://m.media-amazon.com/images/I/61p-pq34iZL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Will this unit convert a single phase 240v generator output (center tap ground) to 120v?** A: Yes **Q: Will it be safe for a 120v. 550w appliance ?** A: The 1000W transformer is likely fine, but note that some devices (like laser printers) draw a lot of power when they first start up (sometimes 2 or 3 times listed power draw( and you need to allow for that. **Q: where can I purchase fuses for the transformer?** A: Very giid **Q: will this work on 1750w air fryer?** A: It should be work. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works as advertised. *by on Reviewed in the United States September 19, 2025* Product arrived quick. I've used the step up transformer for about 3 hours and it definitely works as advertised. Good simple instructions come with the unit. I don't have a way to test it for how many watts it puts out at this time. Would definitely recommend to this point. ### ⭐⭐⭐⭐⭐ Does what it states *by on Reviewed in the United States January 11, 2023* Fast delivery and worked as it stated. ### ⭐ Poor product *by on Reviewed in the United States September 23, 2025* Very disappointed with this product ..one of the fuses popped which I needed to replace but the whole housing broke while trying to unscrew the top section .Now I am unable to remove the popped fuse which then makes using this a problem .This should be covered under the warrenty period of 3 years I would like the seller to contact me as there is no indication as to contacting this seller unless I am missing something@Amazon can you assist ## Frequently Bought Together - Goldsource 3000W ST Pro+ Auto Step Up & Step Down Voltage Transformer Converter, Upgraded Heavy-Duty AC 110/220V Converter with US Standard, Universal AC Outlets & DC 5V USB Port [3-Year Warranty] - Yinleader 1500W Step Up & Step Down Voltage Transformer Converter 110V to 220V or 220V/230V/240V to 110V/120V Power Converter w/US Power Cord,Circuit Breaker Protection --- ## 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.at/products/227740909-goldsource-3000w-st-pro-auto-step-up-and-step-down](https://www.desertcart.at/products/227740909-goldsource-3000w-st-pro-auto-step-up-and-step-down) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-08-09*