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Spool of ultra-thin lead-free solder wire 0.01 inch diameter silver-grey finish

Ultra-Thin Lead-Free Solder Wire 0.01in 0.3mm Sn99 Ag0.3 Cu0.7 50g

SKU CH-DR3G-R6ATV

Ultra-thin 0.01in lead-free solder wire with Sn99 Ag0.3 Cu0.7 alloy melts at 217°C for precise SMD work

  • Fit and compatibilityOut-Opening, Narrow Stile, Store Front Doors
  • Certifications and standardsLead Free Compliant
  • Ultra-thin 0.01in diameter reaches tiny SMD pads
  • Low 217 °C melting point speeds up every joint
  • Sn99 Ag0.3 Cu0.7 alloy delivers reliable conductivity
  • Lead-free composition meets RoHS-compliant requirements
  • 5 % rosin-core flux cleans while you solder

Ultra-thin 0.01in solder wire

This lead-free solder wire measures 0.01in (0.3mm) in diameter and weighs 50g. It uses a Sn99 Ag0.3 Cu0.7 alloy with a 2.5 flux core. The low melting point of 217°C (419°F) suits precise electronics work. It is intended for hobbyists and technicians handling fine-pitch components.

Limits of rosin-core 0.3mm wire

The 0.3mm diameter restricts use to small SMD pads and fine connectors. Larger joints or through-hole pins need thicker wire for adequate fill. The 2.5 flux level cleans light oxidation but may require extra flux for heavy boards. Melting at 217°C demands a controlled iron to avoid overheating sensitive parts.

Sn99 Ag0.3 Cu0.7 alloy decides fit

This specific alloy composition determines whether the wire matches your project's metallurgical and regulatory needs. The 99% tin with 0.3% silver and 0.7% copper provides lead-free compliance and good conductivity. Buyers needing a different alloy ratio or leaded solder for lower melting temperatures should select another product.

How it compares

Measured against everything we stock in Soldering Irons & Stations, at today’s prices. Recalculated every night.

Price $14.99
Cheaper than about 73% of the 802 comparable items (median $25.99).

Specifications

Compatibility
Fit and compatibilityOut-Opening, Narrow Stile, Store Front Doors
Environment & compliance
Certifications and standardsLead Free Compliant

Questions about this item

Should I pick the 0.01in diameter or a thicker wire for fine SMD pads?

The 0.01in (0.3mm) diameter is intended for tiny SMD pads; thicker wire deposits excess solder on small joints.

What does the 419°F melting point mean when I am soldering?

The alloy melts at 419°F (217°C), so any iron set above that temperature will flow the solder quickly onto the joint.

Is the Sn99 Ag0.3 Cu0.7 alloy compatible with standard lead-free rosin-core workflows?

Yes, the Sn99 Ag0.3 Cu0.7 alloy with 2.5% rosin flux is a standard lead-free composition for electronics hand soldering.

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