JacobsParts Inc.
JacobsParts Inc. SL50-03 63/37 Rosin Core Solder 0.38mm 50g
Eutectic 63/37 rosin-core solder wire, 0.38 mm diameter, 50 g spool, melts at 184.5 °C for low-temperature electronics work
- TypeWire
- Eutectic 63/37 alloy melts at a single 184.5 °C point, protecting heat-sensitive components
- Rosin-core flux at 2.0 % cleans joints automatically during soldering
- Ultra-thin 0.38 mm diameter allows precise work on dense circuit boards
- 50 g spool (1.75 oz) supplies enough wire for multiple small projects
- Leaded formulation flows smoothly for reliable electrical connections
63/37 rosin-core solder wire 0.38 mm
This 50 g spool contains a eutectic 63 % tin and 37 % lead alloy with 2.0 % flux inside a 0.38 mm diameter wire. The true melting point is 184.5 °C (361.4 °F) rather than a melting range. It is intended for hand soldering of electronic circuitry where low thermal stress is required. No batteries are needed.
Thin gauge for dense boards
The 0.38 mm diameter feeds easily through fine-pitch component leads and surface-mount pads. Because the alloy melts at a single temperature it wets quickly, reducing the time a hot iron must stay on sensitive parts. The rosin flux cleans oxidation during the joint formation, so separate flux application is often unnecessary. The 50 g spool provides enough length for many small assemblies.
Consistent flow during long sessions
The eutectic composition avoids the pasty stage common in non-eutectic solders, so the wire keeps flowing steadily even when joints are made in rapid succession. Flux residue remains non-corrosive after cooling, leaving boards clean without extra cleaning steps. The low melting point protects heat-sensitive components throughout extended soldering work.
Highlights
- Eutectic 63/37 alloy melts at a single 184.5 °C point, protecting heat-sensitive components
- Rosin-core flux at 2.0 % cleans joints automatically during soldering
- Ultra-thin 0.38 mm diameter allows precise work on dense circuit boards
- 50 g spool (1.75 oz) supplies enough wire for multiple small projects
- Leaded formulation flows smoothly for reliable electrical connections
Specifications
| Brand | Jufeng |
|---|---|
| Model | SL50-03 |
| Type | Wire |
Questions about this item
How does the 63/37 eutectic composition affect the melting behaviour?
The 63% tin and 37% lead alloy melts at a single true melting point of 184.5 Celsius instead of a range, reducing heat exposure to sensitive components.
Does the 2.0% rosin flux core produce noticeable fumes during long soldering sessions?
The 2.0% flux core releases typical rosin fumes; adequate ventilation is recommended for extended use.
What minimum iron tip size works reliably with the 0.38mm diameter wire?
A fine conical or chisel tip of 0.5mm or smaller feeds the ultra-thin 0.38mm wire smoothly.
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