Description
The LASA Sn60/Pb40 Solder Wire LI 6040W is a high-quality electronics-grade rosin core solder wire designed for professional and DIY soldering applications. With a 60/40 tin-lead alloy composition, this solder wire ensures excellent wetting performance, strong joint formation, and reliable electrical conductivity.
This solder wire is manufactured to meet J-STD-004B, ASTM B32, and J-STD-006C standards, making it suitable for PCB assembly, electronics repair, industrial soldering, and precision component work.
The rosin core flux (ROL0 classification) is specially formulated to provide low residue, non-corrosive, and non-conductive performance, reducing the need for post-solder cleaning in most applications.
🔧 Key Features
- Sn60/Pb40 (60/40) alloy composition
- High-quality rosin core flux (ROL0)
- Excellent wetting and solder flow
- Low residue and non-corrosive
- Minimal smoke and odor
- Low spattering during soldering
- Strong and reliable solder joints
- Suitable for electronics-grade applications
- Compatible with leaded and lead-free systems
- Meets international soldering standards
⚙️ Why Choose Sn60/Pb40 Solder Wire
The Sn60/Pb40 Solder Wire is one of the most widely used solder alloys in electronics due to its balanced performance.
Advantages:
- Smooth solder flow
- Strong mechanical joints
- Reliable electrical conductivity
- Easy to work with
- Reduced cold solder joints
- Wide working temperature range
Compared to other alloys, this solder wire offers better usability and consistent results, especially in manual soldering.
📊 Technical Specifications (From Datasheet)
| Parameter | Specification |
|---|---|
| Product Name | LASA Sn60/Pb40 Solder Wire LI 6040W |
| Alloy Composition | 60% Tin (Sn) / 40% Lead (Pb) |
| Melting Point (Solidus) | 183°C |
| Flow Point (Liquidus) | 190°C |
| Flux Content | ~2% |
| Flux Type | Rosin |
| Flux Classification | ROL0 |
| Flux Activity | Low |
| Residue | Non-corrosive & Non-conductive |
| Electromigration | Pass |
| Corrosion Test | Pass |
| Operating Temp | 250°C – 280°C (recommended tip) |
🔥 Performance Characteristics
The LASA Sn60/Pb40 Solder Wire LI 6040W offers:
- Excellent solderability on various surfaces
- Fast wetting for efficient soldering
- Clean and shiny solder joints
- Reduced oxidation during soldering
- Low residue after soldering
- Minimal need for cleaning
- Consistent performance across applications
It is specially engineered to create robust and reliable solder joints resistant to whisker formation.
🔌 Applications
This solder wire is ideal for:
- PCB assembly
- Electronics repair
- Arduino & IoT projects
- SMD and through-hole soldering
- Industrial electronics
- Robotics projects
- Mobile & laptop repair
- Power supply circuits
- DIY electronics kits
It performs exceptionally well in both manual soldering and professional electronics work.
🧪 Working Guidelines (From Datasheet)
- Recommended soldering temperature: 250°C – 280°C
- Heat both pad and component lead before applying solder
- Do not apply solder directly to iron tip
- Maintain controlled working environment (20–25°C, 40–65% RH)
- Store in dry, non-corrosive environment
⚠️ Storage & Handling
- Store at 10°C – 40°C
- Keep in dry environment
- Seal properly to avoid contamination
- Avoid long exposure to moisture
- Slight dull surface is normal and does not affect performance
🧼 Cleaning
- Flux residue is non-corrosive and non-conductive
- Cleaning is not required in most cases
- Can be cleaned using IPA (Isopropyl Alcohol) if needed



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