Tin Solder Wire Sn63Pb37 FG 2.2% REL0 0.8 mm 500 g
Sn63Pb37 FG is a professional flux-cored solder wire from Balver Zinn, developed for hand soldering, rework, service, and electronics production where maximum solderability and consistent soldering results are desired. The combination of the classic Sn63Pb37 alloy and an REL0-classified flux provides fast wetting, excellent solder joints, and a stable soldering process.
The popular wire diameter of 0.8 mm makes the product suitable for general electronics assembly, PCB repair, and precision soldering of components in modern electronics.
Sn63Pb37 – the electronics industry's classic solder alloy
Sn63Pb37 is a eutectic alloy consisting of 63% tin and 37% lead. The alloy has a precise melting point of 183 °C and transitions directly from solid to liquid form without a plastic transition range.
This offers several significant advantages:
• Fast and controlled solidification
• Low risk of cold solder joints
• Excellent wetting properties
• Excellent solder joints
• High process stability
• Proven reliability
Therefore, Sn63Pb37 continues to be widely used in production, service, maintenance, and rework where leaded processes are permitted.
Flux-cored solder wire with 2.2% REL0 flux
This variant contains 2.2% flux and is classified as REL0 according to IPC J-STD-004.
The flux system contributes to:
• Fast activation during soldering
• Effective removal of oxides
• Good flowability
• Uniform solder joints
• Minimal residue after soldering
• Stable soldering process
The result is high soldering quality and easier handling for both manual soldering and repair.
Ideal for hand soldering and rework
The 0.8 mm wire diameter makes the solder wire suitable for a wide range of tasks:
• Hand soldering of PCBs
• Electronics repair
• Rework of SMD and THT components
• Service and maintenance
• Prototyping and development work
• Industrial electronics
• Telecommunications
• Measurement and test equipment
The diameter offers a good balance between precision and efficiency and is among the most commonly used sizes for electronics work.
High solder quality and excellent solder joint appearance
Sn63Pb37 is known for its excellent soldering properties and appealing solder joint appearance.
The advantages include:
• Shiny solder joints
• High mechanical strength
• Excellent wetting
• Consistent soldering results
• High reproducibility
• Stable soldering process
This makes the product popular among electronics manufacturers, service departments, and repair workshops.
Advantages of Sn63Pb37 FG
• Classic eutectic Sn63Pb37 alloy
• Flux content 2.2%
• REL0-classified flux
• Excellent wetting properties
• Shiny solder joints
• Suitable for hand soldering and rework
• High process stability
• Easy dispensing with 0.8 mm wire
• Proven reliability
Technical Specifications
Manufacturer: Balver Zinn
Product name: Sn63Pb37 FG
Product type: Flux-cored solder wire
Alloy: Sn63Pb37
Composition: 63% tin / 37% lead
Flux content: 2.2%
Flux classification: REL0
Wire diameter: 0.8 mm
Spool weight: 500 g
Melting point: 183 °C
Application: Hand soldering, rework, and electronics service
Leaded: Yes
Production standard: WBZ BaTiLoy
DIN EN ISO 9453: Alloy 102