What is this electrical component CR ? | Physics Forums Jan 16, 2012Re: What is this electrical component "CR"? cell relay A transmission technology that uses small fixed-length packets (cells) that can be switched at high speed. It is easier to build a switch that switches fixed-length packets than variable ones. ATM uses a type of cell relay technology. Google is your friend. You should learn to use it.Difference between RC and CR circuits | Physics ForumsJan 07, 2016Circuit symbol CR | Physics ForumsJun 12, 2012See more results 100+ Electrical & Electronic Circuit Symbols Electrical symbols or electronic circuits are virtually represented by circuit diagrams. There are some standard symbols to represent the components in a circuits. This article gives some of the frequently used symbols for drawing the circuits. There are many electrical and electronic schematic symbols are used to signify basic electronic or electrical device. These are mostly we used for draw circuit diagrams.