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Alpha WS-826 solder paste – water-soluble formulation tailored for fine-pitch SMT assembly, ensuring precise print definition, excellent coalescence, and easy post-solder cleaning to achieve reliable high-density PCB solder joints.

  • Item Number: WS-826

  • Manufacturer: MacDermid Alpha®

  • Lead Type: Lead-Free (RoHS compliant)

  • Alloys: SAC305 (others available)

  • Type: Water-soluble solder paste

  • Package: Contact to Techniq VN for details.

  • Shelf Life: Contact to Techniq VN for details.

1. Product Overview

Alpha WS-826 Solder Paste is a high-performance, no-clean solder paste designed for lead-free assembly processes. It delivers excellent wetting, superior solder joint formation, and consistent reliability across fine-pitch and high-density surface mount assemblies. The paste exhibits stable rheology, extended stencil life, and minimal, non-corrosive residues, making it ideal for advanced electronics manufacturing.

2. Applications

WS-826 is suitable for surface mount technology (SMT) applications, including BGAs, QFPs, and other fine-pitch components. It can be applied via stencil printing, syringe dispensing, and rework operations, providing precise and repeatable solder deposition. The paste is particularly effective in high-volume production where consistency and process control are critical.

3. Typical Properties – Specifications

  • Alloy Composition: SAC305 (Sn96.5/Ag3.0/Cu0.5)

  • Flux Type: No-clean, halogen-free

  • Viscosity: Optimized for stencil printing and dispensing

  • Residues: Minimal, non-corrosive, suitable for no-clean processes

  • Print Life: Extended stencil life under normal production conditions

  • Reflow Profile: Suitable for lead-free reflow temperature profiles

  • Storage: Refrigerated storage recommended to maintain paste consistency and performance

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