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Coil of silver-grey solder wire on plastic spool

63/37 Tin Lead Rosin Core Solder Wire .8mm 100g

SKU CH-GC7T-20HKH

63/37 tin-lead rosin-core solder wire, 0.8 mm diameter, 100 g spool with 2.0 % flux for electrical and PCB repair

  • Fit and compatibilityDZ-CSW-100G, Electrical soldering wire
  • 63/37 tin-lead alloy melts at a lower temperature for fast joints
  • 0% rosin core flux cleans surfaces so solder flows smoothly
  • 8 mm diameter suits fine-pitch PCB work and general repairs
  • 100 g spool provides ample length for multiple projects
  • Strong, durable bonds suit electrical, electronic and appliance soldering

What it is

This is a 63/37 tin-lead rosin-core solder wire supplied on a 100 g spool with a 0.8 mm diameter. It is intended for electronics hobbyists, repair technicians and engineers who need a traditional leaded alloy for hand soldering.

Practical limits

The 63/37 eutectic composition melts at a single temperature lower than common lead-free alternatives, allowing faster joint formation with less thermal stress on components. The 2.0 % rosin flux core suits general electrical and PCB work but may leave residue that requires cleaning for high-reliability or conformal-coated assemblies. Leaded solder is restricted in many jurisdictions, so it cannot be used where RoHS compliance is mandatory.

Build and daily use

The 0.8 mm thickness feeds smoothly through standard soldering iron tips and suits a wide range of through-hole and surface-mount pads. A 100 g spool provides enough length for many small projects while remaining compact on a bench. The rosin core activates during heating, reducing the need for separate flux application during routine repairs.

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 compatibilityDZ-CSW-100G, Electrical soldering wire

Questions about this item

Is the 0.8 mm diameter the right choice for general PCB work or should I pick a thinner wire?

The 0.8 mm diameter is a standard size that feeds well for through-hole components and larger surface-mount pads, while still being manageable for finer joints with a suitable tip.

What does the 63/37 tin-lead ratio mean for melting behaviour on a joint?

The 63/37 alloy is eutectic, so it melts and solidifies at a single temperature without a pasty range, giving fast, reliable joints with less risk of cold solder connections.

How does the 2.0 % rosin-core flux affect the soldering process?

The 2.0 % rosin core cleans oxidation as the solder flows, promoting wetting on copper pads and component leads without needing separate flux application for most electrical repairs.

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