ASAHI WC63J12E solder wire with FC5005 core flux
ASAHI WC63J12E is a flux-cored solder wire for electronic soldering with an Sn63Pb37 alloy. This means that the tin and lead are mixed in the classic 63/37 ratio, and the flux is contained within the wire, allowing for direct soldering without the need for separate flux application in many common tasks.
The flux is FC5005 no-clean core flux, classified as ROL0 and halogen-free. In practice, this means it is designed to leave very little residue after soldering. The residue is described as clear, slightly yellowish, and minimal, and generally does not require removal. This is the type of solder wire chosen when seeking a clean and simple process for assembly, rework, or minor repair tasks.
The recommended soldering temperature is above 320°C, with a soldering time of 1–3 seconds. This is well-suited for fast and controlled manual soldering, where a stable melt is desired without holding the soldering iron on the workpiece for longer than necessary.
If cleaning is required, the residue can be removed with a standard solvent-based flux cleaner. According to the datasheet, the wire can also be used for automatic soldering, manual soldering, rework, point soldering, and brush soldering.
Typical applications
- Manual soldering in electronics production
- Repair and rework
- Point soldering and manual assembly
- Processes where no-clean and low residue are desired
Specifications
- Manufacturer: ASAHI
- MPN: WC63J12E
- Alloy: Sn63Pb37
- Flux: FC5005 no-clean core flux
- Flux classification: ROL0
- Halogen content: None added
- Flux content: 2.0 ± 0.2 wt%
- Density of core flux at 25°C: 0.866
- Recommended soldering temperature: > 320°C
- Recommended soldering time: 1–3 seconds
- Residue: Minimal, clear with a slight yellow tone
- Cu corrosion test: Pass
- Copper mirror test: Pass
- DATASHEET: View datasheet from manufacturer
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