1. Functional difference

The role of the PCB is to turn a program (including data) that cannot run independently in a multiprogramming environment into a basic unit that can run independently, a process that can be executed concurrently with other processes; a piece of program code executed on the CPU.

Excellent circuit design in PCBA boards can save production costs and achieve good circuit performance and heat dissipation.

2. Essentially different

The PCB is the only sign of the existence of the process, and the PCB process control block is the static description of the process. PCB is the support body of electronic components and the provider of circuit connection of electronic components.

The essence of PCBA board is a production process. The whole process of PCB empty board through SMT patch, or DIP plug-in.

As can be seen from the above introduction, PCBA generally refers to a processing process, and can also be understood as a finished circuit board, that is, PCBA can only be calculated after all the processes on the PCBA are completed. PCB, on the other hand, refers to an empty printed circuit board without any components on it.

So in general: PCBA is a finished board; PCB is a bare board.