Alpha WS-820 SAC305 87.5-4-M18 is a no-clean lead-free solder paste designed for high-reliability SMT assembly applications. It uses SAC305 alloy composition (96.5Sn/3.0Ag/0.5Cu) and features excellent print consistency, strong wetting performance, and low voiding characteristics. The solder paste is optimized for fine-pitch components and provides stable reflow performance with minimal residue, making it suitable for electronics manufacturing, automotive, industrial, and high-reliability PCB assembly processes. The 600-gram cartridge format is commonly used for automated dispensing and production environments.