The wiring angles in PCBA play a significant role in both the electrical and mechanical performance of the board. From an electrical perspective, sharp angles in wiring should be avoided. When a signal travels along a trace with a sharp angle, it can cause signal reflections. This is because the sudden change in the trace's geometry disrupts the characteristic impedance of the transmission line. For instance, a 90 - degree angle can create a discontinuity that reflects a portion of the signal back towards the source.

　　To minimize signal reflections, it is recommended to use rounded or 45 - degree angled traces. Rounded traces provide a smooth transition for the signal, maintaining a more consistent characteristic impedance. A 45 - degree angle also reduces the impedance mismatch compared to a 90 - degree angle.

　　Mechanically, proper wiring angles contribute to the durability of the PCBA. Sharp - angled traces are more prone to cracking during the manufacturing process, especially when the board is subjected to bending or thermal stress. By using gentle angles, the stress on the traces is distributed more evenly, reducing the risk of mechanical failure. Additionally, when considering the routing of multiple traces, maintaining consistent wiring angles can improve the overall layout aesthetics and make the board easier to manufacture and inspect.