[SI-LIST] Re: Controled ESR capacitor
- From: Istvan Novak <istvan.novak@xxxxxxxxxxx>
- To: junichi.yamada.ak@xxxxxxxxxxx, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 21 Aug 2018 23:30:25 -0400
Hi Yamada,
This appears to be part of a generic trend of component shortage and
product cancellations: ceramic capacitor manufacturers are rerouting
their existing production capabilities to higher-volume and more
lucrative applications. Users over the many years have been very
successful demanding lower prices to the point that it has become
financially not viable to invest in new manufacturing capacity. The
interesting twist is that people try to replace ceramic capacitors with
other types, for instance polymer capacitors, which tend to be more
costly then ceramics. On a practical note: if you need an ohm of ESR,
you can simply add a series one-ohm discrete resistor. The added piece
increases the inductance, but with an ESR of an ohm, the impact tends to
be small. This of course wont help if you already have a product in
volume manufacturing with just the controlled-ESR footprint.
Regards,
Istvan Novak
On 8/21/2018 9:49 AM, Junichi Yamada wrote:
Hello experts
In my product, I use ESR controlled capacitor. (For example ESR = 1000 mÙ)
However, TDK decided to discontinue this product.
https://product.tdk.com/info/en/products/emc/emc/absorber/catalog.html
Please let me know if you know another capacitor with similar characteristics.
* I know the Murata's LLR series. (However, there is the possibility of
discontinuing production as well.)
https://psearch.en.murata.com/capacitor/product/LLR185C70G105ME07%23.html
Regards.
Yamada
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