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Clear plastic tube holding 0.42 oz spool of 0.031 inch 63/37 tin-lead rosin-core solder wire

Solder Wire Rosin Core 63/37 Tin Lead .031" .42oz

SKU CH-EM7T-C9EWJ

Rosin-core 63/37 tin-lead solder wire, 0.031 inch diameter in a pocket-sized tube for DIY electronics work

  • Fit and compatibilityOut-Opening, Narrow Stile, Store Front Doors
  • 63/37 tin-lead alloy melts at 183 °C for easy joints
  • 031 in diameter feeds cleanly through fine-pitch work
  • Rosin core cuts oxidation so connections stay bright and strong
  • Low-splash, low-smoke flux keeps boards clean and air clear
  • Pocket-size 0.42 oz tube stores neatly for DIY or field repairs

Precision electronics solder

This rosin-core solder wire uses a 63% tin and 37% lead alloy that melts at 183 °C or 361.4 °F. The .031 inch diameter suits fine-pitch components and general DIY electronics work. It comes in a .42 oz pocket-sized storage tube for easy carrying.

Low-melting alloy behaviour

The eutectic composition turns liquid at a single temperature, reducing the time the iron dwells on sensitive parts. Rosin flux activates quickly to cut oxidation, producing bright joints with minimal splatter and low smoke. No toxic odour is noted during normal use.

Portable tube format

The plastic tube protects the coil from kinks and moisture between sessions. Its compact size fits a tool pocket or small project box, so the wire stays clean and ready for intermittent bench or field repairs. Lead content requires careful handling and ventilation.

How it compares

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

Price $10.99
Cheaper than about 85% of the 802 comparable items (median $25.99).

Specifications

Compatibility
Fit and compatibilityOut-Opening, Narrow Stile, Store Front Doors

Questions about this item

How do I install the .031" diameter solder wire into a soldering iron, and what step is often missed?

Feed the 0.8 mm wire through the iron's guide tube until it touches the heated tip; the step people miss is tinning the tip first so the 63/37 alloy wets cleanly at 183 °C.

What maintenance or replacement will the rosin-core solder wire need later?

The 0.42 oz tube is consumed as you solder; when empty, replace it with another 63/37 rosin-core spool — no internal parts wear out.

What limit appears first during sustained soldering with this 63/37 tin-lead wire?

The flux core depletes before the alloy, so prolonged joints may lose wetting action once the rosin in the 0.031" strand is exhausted.

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