When dealing with high-current leads in PCBA, several key aspects need to be taken into account. Firstly, the cross - sectional area of the conductors is of utmost importance. High - current leads should have a sufficiently large cross - sectional area to minimize resistance. According to the conductor should be sized based on the current - carrying capacity tables provided by material suppliers.

　　Secondly, proper grounding is essential. High - current circuits need a dedicated and low - impedance ground path. This helps to prevent ground loops and ensures stable electrical performance. A common practice is to use a wide ground plane that can effectively dissipate the return current. Additionally, the connection between the high - current source, load, and ground should be made as short and direct as possible. Any unnecessary bends or long runs in the high - current path can increase inductance, which may lead to voltage drops and electromagnetic interference (EMI) issues.

　　Furthermore, insulation and protection of high - current leads are necessary. Insulating materials with high dielectric strength should be used to prevent short - circuits. In some cases, adding shielding around high - current conductors can also help to mitigate EMI problems, especially in sensitive electronic systems.