Is this low ESR?

[audrey]

Hello all,
From what I've read on other threads, I don't think this is going to be considered low ESR but just want to make sure. Our cap vendor is out of the capacitor that I usually order that specifically says "low ESR", they only have tall ones that don't fit in anything. The caps i'm trying to order are for monitors.
Our vendor found these available but they do not specify it as a "low ESR" Here are the details:
• CAPACITOR ALUM ELEC, 1000UF, 16V, 20%, RADIAL
• Capacitance: 1000uF
• Capacitance Tolerance: ± 20%
• Diameter: 10mm
• ESR: 0.104ohm
• Height: 20mm
• Capacitor Terminals: Radial Leaded
• Lead Spacing: 5mm
• Life Time @ Temperature: 1000 hours @ 105°C
• RoHS Compliant: Yes

[mariushm]

Re: Is this low ESR?

The ESR value depends on several factors : capacitance, voltage rating, size of capacitor.
What may be low esr for a particular capacitor, may not be so low esr for another capacitor rated for another voltage and/or another capacitance.

0.104 ohm ESR for 1000uF 16v sounds good, it's low ESR. There are capacitors that have much lower ESR but the power supplies in a monitor are not that "serious" to require ultra low ESR.

One thing that I find a issue with is that life time @ temperature of only 1000 hours @ 105c. The power supply and electronics in monitors is often located in closed/poorly ventilated boxes in the back, so the capacitors are subjected to lots of heat.
1000 hours @ 105c is a bit on the low value for monitor usage.
There are series of capacitors that are rated for 2000-4000 hours for that particular size, and up to 10000 hours @ 105c for larger capacitors. See for example Panasonic FM and FR series of capacitors.

I also don't see any mention of the brand and series - if it was a quality capacitor, he wouldn't be reluctant to tell you what is it and you should be able to locate the actual datasheet. Don't try to save a few cents by getting some "random" brand.

You can get quality capacitors from digikey.com or mouser.com (both US companies). Look for Panasonic FM or FR , United Chemi Con KZE, KY, KZH , Nichicon HM, HE ... Rubycon ... all quality capacitors.

[y_not]

Re: Is this low ESR?

Being you're in the USA, you can also get them here from the website's store.
Shipping is cheap and the cap prices are hard to beat for legitimate, official, non-knock off caps.

As for brand & series, mariushm beat me to it. You ABSOLUTELY need to find out what it is in that regard. If the vendor won't tell you, then say I'm sorry, I can't buy from you. These things should not be a secret. Then go look elsewhere at one of the aforementioned sites.

This link will answer other questions you may have regarding the subject, as well as important tips to keep you from getting the wrong cap for the job.
https://www.badcaps.net/forum/showthread.php?t=21004

*Match the board's caps (job) to the replacement (cap), not the other way around.

[audrey]

Re: Is this low ESR?

Thank you y_not & mariushm! I've sent a couple emails asking about the brand but no response on that regard, so I'm guessing its not too great. I will let my ordering department know about digikey.com or mouser.com & hopefully they have what I need.

Thanks again & have a good weekend!