Lead-free alloy reduces silver to cut costs

New from Cookson Electronics, Alpha SACX0807 is a low-silver lead-free wave-soldering alloy claimed to offer performance similar to SAC305 on complex dual-sided assemblies where excellent wetting is required.

It is also said to exhibit high mechanical reliability, even after high-stress thermal cycling.

According to Mike Murphy, Cookson's Global Product Manager for Wave Solder Products: "We developed new Alpha SACX0807 based on the continued industry-wide customer recognition of the important role silver plays in improving soldering performance and joint reliability".

"This has been confirmed in the extensive testing done on this alloy, both in our labs and in the field".

"With Alpha SACX0807, assemblers of high-complexity dual-sided PCBs destined for use in high-end electronics products, where high reliability is essential, will now have a lead-free alloy that offers comparable performance to SAC305, but at a lower cost".

"Alpha SACX0807 produces less dross and works well in the lower operating temperature processes associated with higher-silver SAC alloys like SAC305".

Alpha SACX0807 extends the existing SACX family of products.

Alpha SACX0307 (launched in 2004) delivers excellent soldering and reliability for both single-sided and standard complexity dual-sided assemblies.

Alpha SACX DT was developed to minimise copper erosion associated with the longer contact times required during selective soldering and rework operations.

Alpha SACX HASL was developed to deliver smooth, a uniform pad finish, while minimising copper erosion during the plating process.

The Alpha SACX family of products is available in standard bar, feeder bar and wire forms.