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JTT Assembly Solder Standards and Comparison to IPC-A-610 Class 3
The IPC-A-610 standard provides rules for through-hole and surface mount PCB solder joints, which have been widely accepted throughout the electronics industry. This standard defines three classes, numbered 1 through 3, that are to be applied depending on the level of reliability required.
So why three classes? Although it may seem logical to always require Class 3, this level of quality can be expensive to obtain, and the extra reliability may be over-kill in some applications.
IPC-A-610 differentiates between the three classes in this way:
Class 1 is meant for PCBs used in general-purpose applications. In these PCBs, reliability is important, but so is cost, and Class 1 strikes a balance between cost and reliability that makes sense for products such as inexpensive consumer electronics.
At the other end of the spectrum, Class 3 is meant for applications requiring the high reliability, and where cost is much less of an issue. Class 2 (of course) falls between the other classes.
JTT Assembly treats every PCB it assembles as though it is destined for a very high-reliability application. In fact, our standards meet, and often exceed the requirements of IPC-A-610 Class 3, as shown below.
Following are JTT Assembly’s standards for through-hole and SMT solder joints: