PCB Spacers - Working Principle PCB Spacer is a mechanical support component used to fix the distance between multi-layer circuit boards (PCB). Its main function is to ensure a stable spacing between PCB boards to prevent short circuits, mechanical stress concentration or poor heat dissipation. It is widely used in electronic equipment, communication equipment, industrial control systems and other scenarios that require stacking or multi-layer PCB installation. Wire clamp - Application examples A wire clamp is used for fixing and clamping and is commonly used in power engineering, electronic equipment, communication systems and other fields.