In today’s fast-growing electronics industry, choosing the right lead-free solder bar is important for product quality and environmental safety. Two popular alloys used in soldering are Sn-Cu (Tin-Copper) and Sn-Ag-Cu (SAC).
At Kothari Metsol, a trusted name in solder bar and lead-free solder stick manufacturing, we help industries find reliable and RoHS-compliant soldering solutions.
Why Choose Lead-Free Solder Bars?
Lead-free solder bars are safer alternatives to traditional lead-based solders. They are used in PCB assembly, electronics repair, and electrical manufacturing.
Benefits include:
- Eco-friendly and RoHS compliant
- High strength and clean joints
- Reduced toxicity and better worker safety
- Long-term reliability
Kothari Metsol offers lead-free solder bars that meet global quality standards, ensuring smooth performance in both manual and wave soldering.
Understanding Sn-Cu Lead-Free Solder Bars
Sn-Cu (Tin-Copper) is a simple and cost-effective lead-free alloy. It is widely used in wave soldering for circuit boards.
Key Features:
- Composition: 99.3% Tin and 0.7% Copper
- Melting Point: Around 227°C
- Affordable and ideal for general electronic soldering
- Good mechanical strength
Advantages:
- Cost-effective solution
- Low oxidation rate
- Suitable for large-scale soldering
Best For: Manufacturers who need reliable soldering at a lower cost.
Understanding Sn-Ag-Cu (SAC) Lead-Free Solder Bars
Sn-Ag-Cu, often known as SAC solder, contains Tin, Silver, and Copper. This combination offers superior performance, especially for fine-pitch and high-reliability applications.
Key Features:
- Composition: Typically 96.5% Tin, 3% Silver, and 0.5% Copper
- Melting Point: Around 217°C
- Excellent thermal fatigue resistance
- Strong, shiny joints
Advantages:
- Higher joint strength
- Better thermal performance
- Smooth solder flow
Best For: Industries focused on precision, such as automotive electronics, consumer electronics, and high-end PCBs.
Sn-Cu vs Sn-Ag-Cu (SAC): A Quick Comparison Table
| Feature | Sn-Cu (Tin-Copper) | Sn-Ag-Cu (SAC) |
|---|---|---|
| Composition | 99.3% Sn + 0.7% Cu | 96.5% Sn + 3% Ag + 0.5% Cu |
| Melting Point | 227°C | 217°C |
| Strength | Moderate | High |
| Cost | Lower | Higher |
| Applications | General soldering | High-performance electronics |
| Oxidation Resistance | Moderate | Excellent |
Which One Should You Choose?
Choosing between Sn-Cu and SAC lead-free solder bars depends on your project’s needs.
- If you want cost-efficient soldering, go for Sn-Cu.
- If you need superior durability and conductivity, SAC is the best option.
At Kothari Metsol, we provide both types — ensuring consistency, purity, and strong bonding every time you use our lead-free solder bars or solder sticks.
Why Buy Lead-Free Solder Bars from Kothari Metsol?
- ISO-certified manufacturing process
- High-purity raw materials
- Custom alloy options
- Fast delivery and expert technical support
Whether you’re looking for lead-free solder bars, lead-free solder sticks, or custom solder alloys, Kothari Metsol delivers performance and reliability at every step.
Conclusion
Both Sn-Cu and SAC lead-free solder bars have their strengths. Sn-Cu is perfect for cost-effective production, while SAC offers superior mechanical and thermal properties.
By choosing Kothari Metsol, you get access to trusted, high-quality solder products that meet international standards — helping your business stay ahead in quality, safety, and sustainability.
Upgrade your production with premium lead-free solder bars and solder sticks from Kothari Metsol.
Contact us today to discuss your soldering requirements and get the best deal for your industrial needs.