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Silver-grey 1.2mm solder wire on a 50g spool with rosin flux core

Lead Free Solder Wire 1.2mm 50g Rosin Flux Core Sn99 Ag0.3 Cu0.7

SKU CH-ECC6-A793H

Lead-free 1.2 mm solder wire with 2.5 % rosin flux core, Sn99 Ag0.3 Cu0.7 alloy on a 50 g spool

  • Fit and compatibilityOut-Opening, Narrow Stile, Store Front Doors
  • Certifications and standardsLead Free Compliant
  • Lead-free Sn99 Ag0.3 Cu0.7 alloy meets RoHS compliance
  • 2 mm diameter suits fine-pitch components and connectors
  • 5 % rosin flux core removes the need for separate flux
  • 50 g spool provides consistent melting point for reliable joints
  • Suitable for engineering, hobbyist and professional repair work

Lead-Free Solder Wire 1.2mm

This 1.2mm lead-free solder wire uses a Sn99 Ag0.3 Cu0.7 alloy that meets RoHS requirements. It is supplied on a 50g spool and targets electronics assembly, repair work and hobbyist projects. The built-in rosin flux core removes the need for separate flux application during soldering tasks.

Sustained Soldering Behaviour

The rosin flux core measures 2.5% and promotes consistent wetting across repeated joints without extra flux. Lead-free composition means flowability is slightly lower than lead-based alternatives, so joints may need a little more dwell time under the iron. Uniform melting point control on each spool helps maintain repeatable results during longer sessions.

Alloy and Flux Constraints

The Sn99 Ag0.3 Cu0.7 alloy complies with lead-free standards but does not match the fluidity of traditional tin-lead solders. Rosin core content is fixed at 2.5%, limiting suitability for heavily oxidised surfaces that demand aggressive flux. Diameter is set at 1.2mm, which restricts use on very fine-pitch components needing thinner wire.

How it compares

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

Price $12.99
Cheaper than about 80% 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

Does the 1.2 mm diameter wire generate fumes that require extra ventilation during long soldering sessions?

The wire is lead-free and RoHS compliant with a 2.5 % rosin flux core, so it produces typical rosin fumes; use normal workshop ventilation.

What soldering iron tip temperature range works with the Sn99 Ag0.3 Cu0.7 alloy?

The alloy melts at a uniform point suited to standard lead-free temperatures; set your iron to the usual lead-free range for 1.2 mm wire.

Can I use this 50 g spool with the 0.3 mm and 3.0 mm wires I already keep on the bench?

Yes, the same flux-core chemistry covers the full 0.3 mm to 3.0 mm range, so you can switch diameters without changing technique.

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