Indium 52441-2268 SAC305 Solid Core Wire Solder Lead-Free .125" Dia 5lb Spool
Indium 52441-2268 SAC305 Solid Core Wire Solder — Lead-Free, .125" Dia, 5lb Spool
Indium 52441-2268 is a SAC305 (96.5Sn/3.0Ag/0.5Cu) lead-free solid core wire solder in a .125" (3.175mm) diameter, supplied on a 5lb spool. SAC305 is the industry-standard lead-free alloy for electronics assembly, offering excellent wettability, reliable joint formation, and strong mechanical performance across a wide range of applications. Indium Corporation's wire solder is manufactured to tight alloy tolerances and is trusted by electronics manufacturers worldwide for wave soldering, hand soldering, and rework operations.
Key Specifications
| Specification | Value |
|---|---|
| Part Number | 52441-2268 |
| Alloy | SAC305 (96.5Sn / 3.0Ag / 0.5Cu) |
| Wire Type | Solid core (no flux core) |
| Diameter | .125 in (3.175 mm) |
| Spool Weight | 5 lb |
| Lead-Free | Yes — RoHS compliant |
| Liquidus Temperature | 217°C (423°F) |
| Solidus Temperature | 217°C (423°F) — eutectic-like behavior |
| Manufacturer | Indium Corporation |
Key Features
- SAC305 alloy — the global standard lead-free alloy for electronics assembly; excellent wettability, joint strength, and thermal fatigue resistance
- Solid core wire — no flux core; use with your preferred flux for full process control, ideal for wave soldering and applications requiring separate flux application
- .125" diameter — larger diameter wire suited for wave soldering, tinning, and high-volume hand soldering operations requiring faster solder deposition
- 5lb spool — production-quantity packaging minimizes changeovers and reduces per-unit cost for high-volume operations
- RoHS compliant — fully lead-free, meeting RoHS and WEEE directive requirements
- Indium Corporation quality — manufactured to tight alloy tolerances with consistent wire diameter for reliable, repeatable soldering results
Ideal Applications
- Wave soldering operations requiring lead-free SAC305 alloy
- Selective soldering with separate flux application
- Tinning of component leads and PCB pads
- High-volume hand soldering with external flux
- Rework and repair requiring solid wire with controlled flux application
- Aerospace, defense, and high-reliability electronics assembly
Frequently Asked Questions
What is SAC305 solder alloy?
SAC305 stands for 96.5% Tin (Sn), 3.0% Silver (Ag), and 0.5% Copper (Cu). It is the most widely used lead-free solder alloy in electronics manufacturing, offering a good balance of wettability, mechanical strength, thermal fatigue resistance, and cost. It has a melting point of 217°C, slightly higher than traditional Sn63/Pb37 eutectic solder (183°C).
What is the difference between solid core and flux-core wire solder?
Solid core wire contains no flux — it is pure alloy wire. You must apply flux separately before or during soldering. Flux-core wire has flux embedded in the center of the wire, which activates during soldering. Solid core is preferred for wave soldering, selective soldering, and applications where flux type and quantity need to be precisely controlled.
What flux should I use with solid core SAC305 wire?
The appropriate flux depends on your process and cleanliness requirements. No-clean liquid fluxes are most common for wave and selective soldering. Water-soluble fluxes offer stronger activation but require post-solder cleaning. Indium Corporation offers compatible flux products — contact MTE Solutions for recommendations based on your specific process.
Is this wire RoHS compliant?
Yes — SAC305 is a lead-free alloy and fully compliant with RoHS (Restriction of Hazardous Substances) and WEEE directives.
What is the shelf life of Indium wire solder?
Indium wire solder has an indefinite shelf life when stored properly in a cool, dry environment away from humidity and oxidizing atmospheres. The alloy itself does not degrade, though the spool packaging should be kept sealed when not in use to prevent surface oxidation.
