Ipc-2221 Pcb Design Pdf ((hot)) Info

The standard specifies how to select these distances dynamically based on three core parameters: the peak working voltage (Vpk), the pollution degree of the operating environment, and the material group based on its Comparative Tracking Index (CTI) rating. Adhering to these spacing rules is one of the most critical steps in preventing dielectric breakdown and ensuring long-term performance under electrical stress.