Solder Connection

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EF-2202 - VOC Free Wave Soldering Flux

ALPHA® EF-2202 is VOC-free, halide-free, rosin/resin-free, low solids no-clean flux which provides the highest activity of any VOC-free flux for defect-free soldering. It is formulated with a proprietary mixture of organic activators which deliver excellent wetting and top-side hole fill. Several proprietary additives are also formulated which act to reduce the surface tension between the solder mask and the solder; thereby, dramatically reducing the tendency of solderball generation. The formulation of EF-2210 is also designed to be more thermally stable; thereby, reducing the occurrence of solder bridging. 

Key Products Features & Benefits: 

  • Bellcore compliant for assemblies requiring this standard.
  • VOC-free to help meet air quality regulations.
  • Exceptional wetting for excellent hole-fill even with OSP coated bare copper boards, with prior reflows.
  • Thermally stable activators provide low solder bridging.
  • Reduces the surface tension between solder mask and solder to provide low solderball frequency.
  • Suitable for selective soldering process.
  • Very low level non-tacky residue to reduce interference with pin testing and good board cosmetics.

Classified J Standard ORLO

Shelf Life - 18 Months from DOM


Product Number : EF-2202

Prod. No. 142810.0010

Data Sheets and Info

Health & Safety

Technical Bulletin

Product Flyer

Product Guide

ROHS Certificate


Q - What does Halide free mean?
A - In many fluxes halides are added to the activation package to promote solderability. In the case of this flux solderability and wetting has been achieved using a range of chemistries which do not contain halides. The inclusion of halides within a flux can promote post soldering residues to become active in the presence of moisture and temperature fluctuations and promote corrosion long term which in turn can cause pcb failure.

Q - What is colophony and can it cause any health issues?
A - Colophony is a generic term for rosin, this is the sap or sticky substance that derives from pine and spruce trees. Its "stickiness" lends itself to being used in a wide range of products. We have traditionally used this product in fluxes due to these specific properties it can however lead to breathing difficulties and skin sensitivity. Always use fume filtration when soldering and change filters regularly.

Q - This flux is VOC Free what does that mean?
A - VOC stands for "Volatile Organic Compounds" which have proven to enhance the green house effect associated with smog etc.
These compounds are attributed to the use of solvents in fluxes, varnishes, paints etc. In the case of this flux we have removed the solvent content and used water instead.

Q - Can l Conformal Coat without cleaning first?
A - If you speak to the suppliers of conformal coatings then they would always recommend that the PCB must be cleaned first as this is how the original testing was done. However with the very low solids fluxes in use today we do see evidence that some companies have coated directly over the post soldering residues without causing issues.

Q - I have heard about the enviromental problems surrounding Halogens how can l elivate this problem from my process?
A - Concerns are increasing regarding the potential environmental and human health impact of Halogens used in electronic assemblies. The by-products of the incomplete combustion of circuit boards and electronic products can include: dioxin and furan-like compounds and acidic or corrosive gasses. This potential toxicity issue is why many organizations are implementing controls to limit or eliminate halogens from their products.

Using assembly materials products that have no halogens in their original formulation is the ideal way to eliminate the materials as possible halogen sources.

Q - What is the difference between rosins and resins?
A - The terms are often used interchangeably, but rosin is a naturally occurring substance, and resin is either a modified rosin or completely synthetic material. Rosins are plant based products and are subject to more natural variation than resins, however resins are commonly used in newer flux formulations due to their more consistent performance.

Q - How does IPCJ-STD-004B flux classification work.
A - Flux designation has three components. The first two letters, RO, RE or OR, represent the basic chemical composition: rosin-based, resin-based or organic acid-based. The next component is flux designation, L, M or H, which describes the flux’s activity level as low, medium or high, and the final component, 0 or 1, this indicates if halides are present.

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