In the example 1A6CR3, what is the assembly designator?

The assembly designator in the example 1A6CR3 is CR3. Assembly designators help identify specific components within an electronic assembly. In this context, "CR" typically indicates a component type, such as a diode or a rectifier, and is followed by a numerical identifier, which in this case is "3."

The other parts of the identifier, such as "1A6" or "A6," represent different categorization information, which may include circuit board identifiers, locations, or type of assembly, but not the specific assembly designator itself. Therefore, understanding that assembly designators are usually a combination of letter codes and numbers that describe the component type and its unique identification allows us to recognize that CR3 is the correct answer.