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The Great SAC Debate: Comparing The Reliability Of SAC305 And SAC405 Solders In A Variety Of Applications

Published:

September 8, 2021

Author:

Heather McCormick, Polina Snugovsky, Craig Hamilton, Zohreh Bagheri, and Simin Bagheri

Abstract:

Although the electronics industry has largely settled on the use of SAC alloys for the assembly of the majority of lead free products, debate continues to exist over which SAC alloy – SAC305 (Sn3.0Ag0.5Cu) or SAC405 (Sn3.8Ag0.8Cu) – to use. The North American industry generally favours SAC405, while the Asian industry favours SAC305. SAC305 has the significant benefit of being less expensive than SAC405 owing to its lower silver content. However, there are lingering questions about whether the reliability of SAC305 is comparable to that of SAC405. Recent studies have concluded that no significant difference exists, but many potential applications were not studied. This paper compares the results of reliability testing of SAC305 and SAC405 in three different cases on a test vehicle representative of a mid-complexity server-type product which included a range of component types from CBGAs to discrete resistors....

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Company Information:

Celestica Corporation

A multinational electronics manufacturing services (EMS) company.

Toronto, Ontario, Canada

IPC Standards Certification Center, Manufacturer of Assembled PCBs, Training Provider

  • Phone +1 416-448-5800

Celestica Corporation website

Company Postings:

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