Reference designator

Reference designator

A reference designator unambiguously identifies 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 sometimes followed by a letter, indicating that components are grouped or matched with each other, e.g. R17A, R17B.

Legends

The construction of reference designators is covered by IEC 61346. The table below lists designators commonly used, and does not comply with the standard.

External links

* [http://webstore.iec.ch/webstore/webstore.nsf/artnum/020748 IEC 61346] Industrial systems, installations and equipment andindustrial products — Structuring principles andreference designations


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