Acceptability of Electronic Assemblies Flashcards

According to IPC-A-610, what is the minimum acceptable solder fill in a through-hole barrel for Class 2 assemblies?

Answer: 50%

IPC-A-610 requires a minimum of 50% barrel fill for Class 2 through-hole solder joints.

Which condition describes a through-hole lead that protrudes beyond the maximum allowable length after soldering?

Answer: Defect condition

Excessive lead protrusion beyond the maximum specified length is a defect condition per IPC-A-610.

A through-hole component's lead is not visible through the solder in the barrel on a Class 3 assembly. This is classified as:

Answer: Defect

For Class 3, the component lead must be discernible through the solder; if not visible, it is a defect.

What term in IPC-A-610 describes a condition that does not meet the target but still meets the minimum requirements for reliability?

Answer: Acceptable condition

An 'acceptable condition' meets minimum performance requirements even if it does not match the ideal target.

Per IPC-A-610, which class of product has the most stringent acceptability requirements for electronic assemblies?

Answer: Class 3

Class 3 represents high-reliability products with the most stringent requirements under IPC-A-610.

A cold solder joint on a through-hole connection typically appears:

Answer: Dull and grainy with a rough surface texture

Cold solder joints have a dull, grainy appearance caused by insufficient heat during soldering.

Which IPC-A-610 condition requires mandatory disposition but does not automatically make the assembly scrap?

Answer: Process indicator

A process indicator requires evaluation and disposition but does not automatically reject the assembly.