Specify criteria which are applicable to “Supported Holes” and “Unsupported Holes” Insufficient soldering is UNACCEPTABLE. The soldering angle on the lead and the barrel /or pad must be compliant to IPC Class 3 for general Schneider manufacturing, ≥ 330° on the solder source side and ≥ 270° on the side opposite to soldering. If Class 2 is chosen for a PCBA: ≥ 270° on the solder source side and ≥ 180° on the side opposite to soldering.