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In electronics, a PCB net refers to a collection of interconnected electronic components or traces on a printed circuit board (PCB) that are electrically connected together to form a functional circuit.

When designing a PCB, the designer creates a net-list, which is a list of all the connections that need to be made on the board. This includes information about which components need to be connected together and how they should be connected. The net-list is used by the PCB design software to create the physical layout of the board, which includes routing the traces to connect the components according to the net-list.

Each net on the PCB has a unique identifier, which is used to associate the physical traces on the board with the corresponding electrical connections in the net-list. The net identifier is usually a name or number that is assigned to the net by the designer.

PCB nets are important in electronics design because they ensure that the electrical connections between components are correctly established and that the circuit functions as intended. PCB design software includes tools for verifying the connectivity of the nets and checking for errors or inconsistencies in the design, helping to ensure the quality and reliability of the finished PCB.