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The Lead Solder Sn50Pb50 alloy composition provides a eutectic-like performance with a plastic range that allows for excellent gap-filling properties. When combined with a high-activity resin core, the Resin Core Lead Solder eliminates the need for external flux application, reducing process steps and contamination risks. Available in multiple roll sizes including Lead Solder 50 50 100g, Lead Solder 50 50 200g, Lead Solder 50 50 250g, and Lead Solder 1kg options, with a standard Lead Solder 1.8mm diameter that suits both automated and manual soldering stations.
This Lead Solder for PCBA applications is trusted by electronics manufacturers worldwide. The Lead Solder 50 50 1.8mm specification has become an industry standard for through-hole component soldering, terminal connections, and rework operations. Whether you are a procurement manager seeking reliable bulk supplies or a distributor building inventory for hardware stores, online marketplaces, and repair shops, this product page provides complete technical and commercial specifications.
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In the demanding world of electrical PCBA manufacturing, the quality of your soldering materials directly impacts production efficiency, joint reliability, and long-term product performance. Our Resin Core Lead Solder Sn50Pb50 50/50 represents the perfect balance between workability, melting characteristics, and mechanical strength. Designed specifically for both high-volume PCBA factories and wholesale distributors, this Lead Solder 50/50 formulation delivers consistent, repeatable results across thousands of joints.
The Lead Solder Sn50Pb50 alloy composition provides a eutectic-like performance with a plastic range that allows for excellent gap-filling properties. When combined with a high-activity resin core, the Resin Core Lead Solder eliminates the need for external flux application, reducing process steps and contamination risks. Available in multiple roll sizes including Lead Solder 50 50 100g, Lead Solder 50 50 200g, Lead Solder 50 50 250g, and Lead Solder 1kg options, with a standard Lead Solder 1.8mm diameter that suits both automated and manual soldering stations.
This Lead Solder for PCBA applications is trusted by electronics manufacturers worldwide. The Lead Solder 50 50 1.8mm specification has become an industry standard for through-hole component soldering, terminal connections, and rework operations. Whether you are a procurement manager seeking reliable bulk supplies or a distributor building inventory for hardware stores, online marketplaces, and repair shops, this product page provides complete technical and commercial specifications.
The Lead Solder Sn50Pb50 composition creates an alloy with a melting range of approximately 183°C to 216°C (361°F to 421°F). Unlike pure lead or tin, this Lead Solder 50/50 exhibits a pasty phase that allows operators to manipulate components before the joint solidifies completely. This characteristic is particularly valuable in manual soldering of complex PCBA assemblies where multiple leads require positioning.
The Resin Core Lead Solder formulation uses a precisely engineered flux that activates at 180°C, ensuring oxide removal begins before the alloy melts. For Lead Solder for PCBA applications involving tin-coated copper pads or old components, this activation temperature prevents "cold solder" defects. The resin residue is non-conductive and corrosion-resistant, meeting IPC J-STD-004 requirements for rosin-based flux systems.
Our Lead Solder 1.8mm diameter represents the optimal wire size for mixed-technology PCBA. Thinner solders (0.5mm-1.0mm) feed too quickly for power joints, while thicker wires (2.5mm+) risk bridging fine-pitch pins. The Lead Solder 50 50 1.8mm offers:
Wire feed rate: 25-35mm per second for automated selective soldering
Joint volume control: Each 1cm of wire delivers approximately 0.025cm³ of alloy
Through-hole compatibility: Ideal for component leads from 0.6mm to 1.2mm diameter
Thermal mass balance: Prevents pad lifting on multi-layer PCBs
For factories using robotic soldering irons, the Lead Solder 1.8mm ensures smooth feeding through guide tubes without jamming. The consistent diameter tolerance of ±0.05mm guarantees repeatable solder joint volumes across millions of cycles.
Understanding that different customers have different consumption patterns, we offer four distinct roll sizes of Lead Solder Sn50Pb50. Each format is optimized for specific workflow requirements.
The Lead Solder 50 50 100g roll is ideal for:
Electrical repair shops where low-volume, high-variety soldering is common
Online marketplace sellers who need affordable entry-level stock
PCB prototype houses testing new Resin Core Lead Solder formulations
Hardware stores serving hobbyists and small appliance repair technicians
Packaged in a compact plastic spool with a clear cover, the Lead Solder 50 50 100g prevents dust contamination while allowing visual inventory checks. Each roll contains a standard Lead Solder 1.8mm diameter wire wound on a 50mm core, compatible with most benchtop solder feeders.
For PCBA factories running 8-hour shifts, the Lead Solder 50 50 200g roll offers the best balance between changeover frequency and spool weight. Operators can complete approximately 2,000-3,000 through-hole joints per roll, reducing downtime for spool replacement. The Lead Solder 50 50 200g format features:
Reinforced cardboard spool for automated feeder reliability
Moisture-resistant inner foil liner protecting the Resin Core Lead Solder
Clear labeling with batch traceability and date coding
Distributors targeting electronics manufacturing services (EMS) providers will find the Lead Solder 50 50 200g to be their fastest-turning SKU. It fits standard solder dispensers from Hakko, JBC, Weller, and Metcal.
When PCBA lines operate 24/7, the Lead Solder 50 50 250g reduces spool changes by 25% compared to 200g versions. This Lead Solder 1kg alternative in smaller packaging suits:
Automated wave soldering preforms
Selective soldering machines with high consumption rates
Contract manufacturers running identical PCBA batches for weeks
The Lead Solder 50 50 250g spool uses the same outer dimensions as the 200g version, ensuring compatibility with existing feeder systems while providing additional wire length (approximately 18.3 meters of Lead Solder 1.8mm diameter wire).
For customers processing millions of joints monthly, the Lead Solder 1kg roll delivers the lowest cost per gram. This industrial-size spool is wound on a 100mm core to maintain smooth feeding in automated systems. The Lead Solder 1kg option provides:
Cost reduction: Up to 18% savings compared to purchasing 200g rolls
Less packaging waste: One plastic bag and one cardboard carton per kilogram instead of five
Extended traceability: Single lot number for the entire kilogram ensures consistent alloy chemistry
PCBA factories performing wave soldering or pot soldering operations prefer the Lead Solder 1kg format for continuous feeders. Distributors importing for warehouse fulfillment can repackage the Lead Solder 1kg into smaller retail units for hardware store and online channels.
The Lead Solder for PCBA applications involving through-hole connectors, transformers, and large capacitors benefit from the Resin Core Lead Solder thermal characteristics. Unlike lead-free alloys that require higher temperatures (260°C+), the Lead Solder Sn50Pb50 melts at 216°C maximum, reducing board stress and component damage.
When using Lead Solder 50/50 with a Lead Solder 1.8mm diameter, operators achieve:
Fill height consistency: Solder rises 75-100% of the plated through-hole barrel
Wetting angle: Less than 25 degrees on IPC Class 3 compliant pads
Void reduction: Resin flux chemistry pushes trapped gases out during solidification
For power distribution PCBA with heavy copper traces, the Lead Solder 1kg spool mounted on automatic wire feeders applies precisely dosed Lead Solder Sn50Pb50 to terminals. The alloy's ductility accommodates thermal expansion mismatches between copper terminals and PCB laminates. Field data from industrial motor drive manufacturers shows Lead Solder 50/50 joints surviving 1,500+ thermal cycles from -40°C to 125°C.
Repair technicians working on legacy equipment require Lead Solder 50/50 because older PCBs used tin-lead finishes. Mixing lead-free solders with existing tin-lead joints creates brittle intermetallics. The Resin Core Lead Solder ensures compatibility without requiring complete desoldering. The Lead Solder 50 50 100g roll is particularly popular among independent repair shops for this reason.
Procurement managers sourcing Lead Solder for PCBA require guaranteed alloy composition and flux activity. Each shipment of Resin Core Lead Solder Sn50Pb50 includes:
Certificate of Analysis (COA) with actual tin (49.5-50.5%) and lead (49.5-50.5%) values
Flux content verification: 2.2% ±0.1% by weight for resin core
Halide-free certification: Meets environmental regulations for electronics
Factories producing automotive, medical, or industrial PCBA can validate our Lead Solder 1.8mm against IPC J-STD-006 requirements. We maintain batch samples for five years, enabling full traceability from ore to finished roll.
Successful distributors stock all four sizes of Lead Solder Sn50Pb50 to capture different customer segments:
Lead Solder 50 50 100g – Price-sensitive retail buyers (hardware stores, Amazon resellers)
Lead Solder 50 50 200g – Small repair chains and educational institutions
Lead Solder 50 50 250g – Regional PCBA shops with medium throughput
Lead Solder 1kg – Large EMS providers and government contractors
The Lead Solder 50 50 1.8mm diameter works across all sizes, simplifying your inventory management. One wire specification serves every customer's equipment.
We understand that Lead Solder 50/50 sold through online marketplaces requires different presentation than factory-direct shipments:
Retail blister packs (carded with hanging hole) for hardware stores
Anti-static bags (with humidity indicator) for Amazon FBA
Master cartons (20 x Lead Solder 1kg rolls) for warehouse distribution
Display floor stands (holding 100 x Lead Solder 50 50 100g units) for electronics parts counters
While Lead Solder Sn50Pb50 delivers superior electrical and mechanical performance, responsible handling is mandatory. The Resin Core Lead Solder emits rosin-based fumes when heated. Always use fume extraction in PCBA production areas. The Lead Solder 50/50 composition contains 50% lead by weight; therefore:
Wash hands after soldering
Do not eat or drink in soldering areas
Dispose of dross and spatter as hazardous waste (check local regulations)
Use nitrile gloves for high-volume operations
Our Lead Solder for PCBA safety data sheets (SDS) meet GHS requirements for 190+ countries. Download current versions from our customer portal using batch-specific links.
To preserve the Resin Core Lead Solder flux activity:
Store at 15°C to 25°C (59°F to 77°F)
Keep original spools in sealed plastic bags below 60% relative humidity
Use Lead Solder 50 50 100g rolls within 24 months of manufacture
Lead Solder 1kg industrial spools have 36-month shelf life when unopened
After opening, consume Lead Solder 50 50 200g or Lead Solder 50 50 250g rolls within 90 days for optimal flux performance. The Lead Solder 1.8mm diameter wire remains functional longer, but flux activity degrades with moisture absorption.
| Property | Lead Solder Sn50Pb50 | SAC305 (Lead-Free) |
|---|---|---|
| Melting point | 183-216°C | 217-220°C |
| Wetting speed | Excellent (0.5-1.0 sec) | Fair (1.5-2.5 sec) |
| Thermal cycle reliability | 1,500+ cycles | 800-1,200 cycles |
| Cost per kg | Lower | 35-50% higher |
| Equipment wear | Low | High (requires titanium tips) |
| Lead Solder for PCBA suitability | Superior for through-hole | Better for SMD reflow |
For factories still operating legacy wave soldering machines, the Resin Core Lead Solder allows continued use without expensive upgrades to nitrogen inerting or specialized nozzles.
Sn63Pb37 (eutectic): Instant solidification, no plastic range – less forgiving for manual soldering
Sn60Pb40: Similar to Lead Solder 50/50 but with slightly higher tin cost
Sn50Pb50 (this product): Best price-performance for general PCBA, especially with Lead Solder 1.8mm diameter
Sn45Pb55: Higher melting point (227°C) – slower production speeds
The Lead Solder Sn50Pb50 offers the lowest tin content acceptable for IPC Class 2 electronics, making it the most economical choice for non-critical consumer goods PCBA.
Download our 45-page Resin Core Lead Solder Application Guide covering:
Optimizing soldering iron tip temperature for Lead Solder Sn50Pb50 (recommended 320-350°C)
Reducing voiding in plated through-holes using Lead Solder 1.8mm feed techniques
Cleaning resin residues after assembly (saponifier or isopropyl alcohol methods)
Failure analysis of Lead Solder 50/50 joints (grain structure, intermetallic growth)
We offer free soldering process audits for customers purchasing Lead Solder 1kg or larger quantities monthly. Our engineers visit your PCBA line to measure wetting angles, void percentages, and thermal profiles.
We support your sales channels with:
Co-op marketing funds – Reimburse 50% of advertising costs for Lead Solder 50 50 100g and Lead Solder 50 50 200g online listings
Free samples – 10 units of Lead Solder 50 50 250g for qualified hardware store buyers
Cross-reference tool – Map competitor part numbers to our Lead Solder 50 50 1.8mm SKUs
Quarterly promotions – Volume discounts on Lead Solder 1kg when combined with Lead Solder 50/50 in smaller sizes
Our distributor portal provides downloadable spec sheets, safety data sheets in 12 languages, and high-resolution product photography optimized for Amazon, eBay, and Alibaba listings.
Whether you operate a high-mix PCBA factory needing consistent Resin Core Lead Solder performance, or you run a distribution business supplying Lead Solder Sn50Pb50 to hardware stores and repair shops, our product line delivers. The Lead Solder 50/50 formulation with Lead Solder 1.8mm diameter covers 80% of manual and automated through-hole soldering applications. With Lead Solder 50 50 100g, Lead Solder 50 50 200g, Lead Solder 50 50 250g, and Lead Solder 1kg options, you can exactly match your consumption patterns without overpaying for unnecessary packaging or under-buying and facing shortages.
Every roll of Lead Solder for PCBA undergoes third-party verification of alloy chemistry, flux activity, and dimensional accuracy. We stand behind our product with a comprehensive guarantee and responsive technical support. Contact our team today to request samples, obtain pricing for Lead Solder 1kg bulk orders, or discuss exclusive distribution territories. Your PCBA deserves the reliability of genuine Resin Core Lead Solder Sn50Pb50.
Contact us:
Email: xfsolder@163.com or xfsolder@gmail.com
WhatsApp/Wechat: +8613450770997
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