What’s the meaning of “CR” marked on the PCB?

Receive the PCB prototype from supplier. And see a CR mark on the board. What does it mean? Is it related to quality control?

November 15, 2023

C for capacitance. R for resistance. CR for capacitive reactance circuit.

Alternating current can pass through the capacitor. When the capacitor is connected to the AC circuit, the charge on the capacitor plate has a hindering effect on the directional moving charge, which is called the capacitive reactance.

#PCB Assembly

Oliver Smith

Oliver is an experienced electronics engineer skilled in PCB design, analog circuits, embedded systems, and prototyping. His deep knowledge spans schematic capture, firmware coding, simulation, layout, testing, and troubleshooting. Oliver excels at taking projects from concept to mass production using his electrical design talents and mechanical aptitude.

Oliver Smith

What Others Are Asking

How can I determine BGA land pad diameter for given ball diameter?

I’m working on a project which requires the use of a CSP package. The product’s datasheet provides ball pitch and ball diameter but nothing about the preferred land pad diameter.
How can the pad diameter be worked out from these figures assuming an NSMD land?

Oliver Smith November 21, 2023

Can I use a hot glue to cover a PCB board to insulate it and prevent it from damage?

I want to DIY PCB board at home, but raw material is limited. Can I hot glue to cover a PCB board? Is it advisable to do that?

Oliver Smith September 20, 2023

What should be the size of an NFC antenna given an operating distance?

I am dealing with a project about a PCB with NFC antenna. We are designing PCB now. Do anyone know about the size of an NFC antenna if we want it operate in 10 centimeters?

Oliver Smith November 14, 2023

What’s the meaning of “CR” marked on the PCB?

Oliver Smith

Oliver Smith

What Others Are Asking

How can I determine BGA land pad diameter for given ball diameter?

Can I use a hot glue to cover a PCB board to insulate it and prevent it from damage?

What should be the size of an NFC antenna given an operating distance?

Read Detailed Advice From Blog Articles