Recent content by Ken Leong

Yes, Dave. All four terminations are shorted.

Hi Guys, thanks for sharing and giving me all the valuable feedbacks and suggestions. Just to answer to some of your queries. - The first two pics are from the same component (sorry for the confusion) and yes, it is shorted diagonally across the terminations when measured standalone after...

Haha...Jim, thanks! Yes, the first two photos are shorted component after removed from the board. Tin whisker? Hmm...I will look into it.

Hi Sohpiecentaur and CWatters, Thanks for your questions. Do you need further information?

Wirenut and Berkeman, is my explanation on the x-ray clear? :P

Hi Jim, thanks for your advice. How would you advice me to open up the component? Horizontally or vertically?

Hi Berkeman, how can you tell there is a different in dimension?

Sorry, not sure how to upload the files. The first 2 photos are of the same faulty ferrite bead which I had mentioned with no abnormality found. The 3rd photo is taken from another failed FB (2nd case) with cracked found inside. Both components are from different boards. The 4th is a sample...

The datasheet can be found here. Part number is CM3312R111R-10 from Laird Technology.

Hi, I am a Reliability Engineer. Currently, I am facing difficulties in finding the root cause to a defective EMI filter bead. Resistance measurements across the four leads (vertically, horizontally, diagonally) show that they are all shorted. However, a good ferrite bead should only be...