Pluggable PCB Connectors vs. PCB Terminal Blocks: Understanding Their Roles in PCB Design Pluggable PCB connectors are two-part electrical systems consisting of a header (soldered to the board) and a removable plug. They let you unplug a wire assembly without touching the board. This is a huge benefit during repairs or upgrades. You simply pull out the connector and plug in a new one. https://froodl.com/pluggable-pcb-connectors-vs-pcb-terminal-blocks-understanding-their-roles-in-pcb-design