Reference designator

A reference designator uniquely idenitifies a component in an electrical schematic (circuit diagram) or on a printed circuit board (PCB). The reference designator usually consists of one or two letters followed by a number, e.g. R13, C1002. The number is sometime followed by a letter, indicating that components are grouped or matched with each other, e.g. R17A, R17B.

Legends

There is exists no standard gouverning the use of reference designators. The table below lists letters commonly used.

(Table to be added)