LCR film capacitor FSC/EX120pF 1% 630V

It's not stated in the data sheet and I haven't spent any time digging into these specific capacitors any further but I suspect it may be something along the lines of marking the outside jacket side of the aluminium foil electrodes. There is a very informative YouTube video by a gentleman called Mr Carlson who explains this very well:

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RE: LCR film capacitor FSC/EX120pF 1% 630V

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And to back up what's said in the video above, here is another website which talks about why there is a band end on some non-electrolytic capacitors: http://www.aikenamps.com/index.php/where-to-connect-the-outside-foil-on-capacitors

Best Regards,

Rachael

Hi Rachael,

50 years ago when a lot of the capacitors were foil wrapped the line was put on one end to indicate the outer foil. This allowed the capacitor, if used for decoupling, to be orientated so that a degree of shielding was afforded and EMI was minimized.

John

John Wiltrout wrote:

 

Hi Rachael,

50 years ago when a lot of the capacitors were foil wrapped the line was put on one end to indicate the outer foil. This allowed the capacitor, if used for decoupling, to be orientated so that a degree of shielding was afforded and EMI was minimized.

John

Yes agreed, and I guess 50 years ago it was more common knowledge amongst engineers, but a lot of people don't ever use these styles of capacitor anymore so this is something that for a lot of people just isn't well known. Fortunately there are still a few people around who know things like this

Dear Rachael and John,

Thank you so much for helping me to understand more about this subject.  It is a pity I don't possess the necessary equipment to carry out the tests.

Kindest regards

King

Hi King,

Fortunately as your capacitors have the bands which indicate the outer foil end you don't need any equipment to test these. Just follow the tips in the video or on the website I linked to correctly orient the capacitors if that is appropriate for your application.

Best Regards,

Rachael

Grateful thanks again, Rachael.

King

You're welcome