Lefavor Sn63/Pb37 is a low-melting tin-lead solder wire, 1 mm in diameter, in a 50 g coil with a 2% rosin flux core. The flux is no-clean and the alloy melts at 183 °C. It is intended for electronics repair, PCB and SMD soldering, ham radio and modelling work. Contains lead.
Specifications
| Parameter | Value |
|---|---|
| Brand | Lefavor |
| Alloy | Sn63/Pb37 (63% tin, 37% lead) |
| Wire diameter | 1 mm |
| Package weight | 50 g |
| Flux content | 2% |
| Flux type | Rosin, no-clean |
| Melting point | 183 °C |
| Melting class | Low-melting |
| Solder type | Tin-lead alloy |
| Flux purpose | Soldering |
| Supplied form | Coil |
What you get
- No extra flux for routine joints — 2% rosin flux is built into the wire.
- No board washing — the no-clean flux can stay on the board.
- Gentle heat — the alloy melts at 183 °C, so small parts are less likely to overheat.
- Easy dosing — 1 mm wire is simple to feed onto wires, leads and pads.
- Compact stock — a 50 g coil fits into any tool organiser.
- Known composition — 63% tin and 37% lead, marked Sn63/Pb37.
Who it is for
Phone, tablet and laptop repair technicians, radio amateurs, modellers and robotics hobbyists. Also for home repairs of household electronics when you want flux-cored wire that leaves nothing to wash off.
Who should look elsewhere
Anyone who needs lead-free solder: this alloy is 37% lead. It is also a poor pick for heavy parts that call for a high-melting alloy — it is a low-melting wire made for electronics.
Applications and compatibility
Repairing smartphones, tablets, laptops and household electronics; soldering printed circuit boards and mounting SMD components; building and modifying ham radio devices; precision work in robotics and modelling. The supplier does not list specific compatible equipment.
In the box
One coil of Lefavor Sn63/Pb37 solder, 1 mm diameter, 2% flux content.
Questions and answers
Do I need to clean the board after soldering?
No, the rosin flux in this solder is a no-clean type. You may remove residue if you like, but it is not required.
At what temperature does it melt?
The Sn63/Pb37 alloy melts at 183 °C. The supplier does not state an iron temperature, so set it to suit the size of the part.
Does this solder contain lead?
Yes, the alloy is 37% lead. Work in a ventilated space and wash your hands after soldering.
Is 1 mm wire usable on SMD parts?
SMD mounting is one of the listed uses. On small packages, feed the wire in short bursts to avoid solder bridges.
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