I found the following part on a circuit board, but I have never seen anything like it before and I am curious.
The blue part is about 1cm long, 5mm high, 4mm thick, and vaguely cylindrically shaped.
There are no further prints on the other side and the ones visible (to me) read 4.00, some kind of round logo and N. I've tried to take a more detailled picture:
On the PCB, the part was labelled with QRC1.
Can someone identify this part?
Best Answer
It is a 4.0 MHz ceramic resonator with built-in load capacitors. You can use it in place of a crystal + load capacitors in most MCU (Pierce type) oscillator circuits.
The center pin goes to ground and the other two go to input and output of the on-chip oscillator (doesn't matter which goes to input and which to output). Similar to a Murata part CSTLS4M00G56Z.