Class 2-A PCBs

Class 2-A PCBs are PCBs from industrial equipment which, however, unlike class 1 PCBs, have hardly any visible gold contacts. The circuit boards are equipped with small chips containing precious metals, transistors and quartz crystals, but must not contain any components (heat sinks, transformers, capacitors) larger than a thumb. Also included are class 1-C PCBs with attachments.