--- product_id: 149880572 title: "0.3mm/50g" brand: "enersystec" price: "MX$564" currency: MXN in_stock: true reviews_count: 8 category: "Enersystec" url: https://www.desertcart.mx/products/149880572-0-3mm-50g store_origin: MX region: Mexico --- # Sn99 Ag0.3 Cu0.7 high conductivity alloy 419°F fast melting point 0.01in ultra-thin diameter 0.3mm/50g **Brand:** enersystec **Price:** MX$564 **Availability:** ✅ In Stock ## Summary > ⚡ Solder Smarter, Not Harder — The Ultra-Thin Wire for Next-Level Precision ## Quick Answers - **What is this?** 0.3mm/50g by enersystec - **How much does it cost?** MX$564 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.mx](https://www.desertcart.mx/products/149880572-0-3mm-50g) ## Best For - enersystec enthusiasts ## Why This Product - Trusted enersystec brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Clean & Lead-Free:** Rosin core flux 2.5% with lead-free formula for safer, eco-conscious soldering - • **Versatile Pro-Use:** Ideal for electronics repair, DIY, manufacturing, and fine soldering tasks - • **Precision Perfected:** Ultra-thin 0.01in diameter for flawless tiny SMD pad soldering - • **Premium Alloy Power:** Sn99 Ag0.3 Cu0.7 composition delivers superior conductivity and reliability - • **Speed Meets Efficiency:** Fast melting at 419°F ensures quick, hassle-free workflow ## Overview This 50g spool of ultra-thin 0.01 inch (0.3mm) lead-free solder wire features a premium Sn99 Ag0.3 Cu0.7 alloy and 2.5% rosin core flux. Melting quickly at 419°F, it’s engineered for precise, clean soldering on tiny SMD pads and delicate electronics, making it the go-to choice for professionals and DIYers aiming for flawless, efficient results. ## Description Ultra-thin 0.01inch solder diameter for tiny SMD pad Rosin Core Solder Wire Delivery Item: 1pack x Lead Free Solder Wire 0.01in 0.11lb. 0.3mm Solder Wire SPEC: > Solder Wire Diameter: 0.01inch or 0.3mm > Weight: 0.11lb. or 50g > Alloy: Sn99 Ag0.3 Cu0.7 > Flux: 2.5 > Melting Point temperature: 419 Degrees Fahrenheit Review: Perfect thin Solder - Item is perfect. not a lot of cleaning needed, but a little cleanup needed for the Flux Rosin core. other than that it is easy and a breeze to use. Makes for easy fixing of those smaller components that take less time to heat up. Perfect for the price! Review: Worked perfectly, to solder a fan back on the motherboard in a Mac Mini - This was a bit of a life-saver. I had taken my Mac Mini apart to discover what my upgrade options were (a disappointing experience, to be sure), and my disappointment was punctuated when I realized I had inadvertently removed the housing for the fan connection from the motherboard. I don't know if it was ever properly soldered in the first place, but I knew that without the ability to cool, it would not function properly. I have very little soldering experience, but after watching some videos, and using this solder, I was able to get it working again. The connector had 4 pins, and I knew I needed something super thin, to avoid spilling over to the neighboring pins. And gratefully, by the grace of God, I was able to get it working. Happy with this purchase. ## Features - ULTRA-THIN- the solder wire diameter is just 0.01inch, designed to solder the tiny component, just enough to add enough solder on those small MSD pads - LOW MELTING POINT- solder fast melting at 419F ( 217 Deg.C), suitable all soldering tools, easy for soldering, fast melting solder wire 0.3mm gauge - IMPROVED SOLDER- this 0.3mm solder wire contented alloy materials Sn99 Ag0.3 Cu0.7, provides excellent conductivity, eliminate soldering issue, reduce labor cost - APPLICATION- good for fine solder work, soldering for electronics equipment, connectors, whatever for electronics repair, diy, manufacturing or soldering study, this fine solder wire is good for use - LEAD FREE- Unlead solder, high performance for electric soldering project, unlead solder wire is good for use at home or office, 0.01 inch diameter solder wire is your right choice for small soldering ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07VT4MLD1 | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #30,554 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #74 in Solder | | Color | Silver | | Customer Reviews | 4.7 4.7 out of 5 stars (589) | | Date First Available | July 29, 2019 | | Included Components | 0.3mm solder wire LeadFree | | Item Package Quantity | 1 | | Item Weight | 1.76 ounces | | Item model number | EST-SW35-0.3LDF50 | | Manufacturer | Enersystec Electric Co.,Ltd | | Material | lead | | Part Number | EST-SW35-0.3LDF50 | | Power Source | ac | | Product Dimensions | 1.1 x 1.1 x 2.17 inches | | Size | Thin Gauge | | Special Features | 1. Ultra-thin 0.01inch diameter, Rosin Core, Flux 2.5%, Flow well, Lead Free Solder Wire | ## Images ![0.3mm/50g - Image 1](https://m.media-amazon.com/images/I/61ra778d57S.jpg) ![0.3mm/50g - Image 2](https://m.media-amazon.com/images/I/61niP-66hHS.jpg) ![0.3mm/50g - Image 3](https://m.media-amazon.com/images/I/61eBv-cjyAS.jpg) ![0.3mm/50g - Image 4](https://m.media-amazon.com/images/I/61nMfz85dLS.jpg) ![0.3mm/50g - Image 5](https://m.media-amazon.com/images/I/61XESRMqbhS.jpg) ## Questions & Answers **Q: Can it be used on brass** A: It is ok to use this solder for the brass, But this solder is very fine, the diameter is 0.01 in / 0.3mm solder wire, If you soldering a big brass, you should use larger solder wire, such as 1.0mm or 1.5mm solder wire **Q: does this can be used to solder aluminium wires ?** A: Yes, this fine electrical solder wire can be used to soldering the aluminum wires, The solder wire diameter is 0.01inch / 0.3mm, very thin solder wire, It is mainly for electronics soldering for components or wires **Q: Can this be coiled around toothpicks without straightening back?** A: Yes. It will probably relax some. **Q: Can I use this with soldering iron to repair keychain?** A: This is super thin that is ideal for working of soldering on motherboards. May need to find a larger size solder wire. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect thin Solder *by A***A on May 14, 2025* Item is perfect. not a lot of cleaning needed, but a little cleanup needed for the Flux Rosin core. other than that it is easy and a breeze to use. Makes for easy fixing of those smaller components that take less time to heat up. Perfect for the price! ### ⭐⭐⭐⭐⭐ Worked perfectly, to solder a fan back on the motherboard in a Mac Mini *by H***P on July 20, 2024* This was a bit of a life-saver. I had taken my Mac Mini apart to discover what my upgrade options were (a disappointing experience, to be sure), and my disappointment was punctuated when I realized I had inadvertently removed the housing for the fan connection from the motherboard. I don't know if it was ever properly soldered in the first place, but I knew that without the ability to cool, it would not function properly. I have very little soldering experience, but after watching some videos, and using this solder, I was able to get it working again. The connector had 4 pins, and I knew I needed something super thin, to avoid spilling over to the neighboring pins. And gratefully, by the grace of God, I was able to get it working. Happy with this purchase. ### ⭐⭐⭐⭐⭐ would buy again *by A***R on October 8, 2025* good quailty .melts easly ## Frequently Bought Together - Ultra-Thin Solder Wire 0.01in 0.3mm Rosin Core Flux 2.5, Lead Free Solder Wire Sn99 Ag0.3 Cu0.7 Flow 50g Electronics Soldering Electric Solder - Lesnow solder wick braid 10ft Length Desoldering Wick Braid Remover Tool Solder Sucker 1 piece No-Clean soldering Wick Wire Roll and Disassemble Electrical Components - Liquid Solder Flux Dropper (30 ml/1 Oz.) I RMA Liquid Solder Flux I Soldering Flux I Electrical Solder I No Clean Liquid Flux I Rosin Flux I Soldering Flux for Electronics I Lead Free Liquid Solder I --- ## 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.mx/products/149880572-0-3mm-50g](https://www.desertcart.mx/products/149880572-0-3mm-50g) --- *Product available on Desertcart Mexico* *Store origin: MX* *Last updated: 2026-05-25*