[SI-LIST] Capacitor surge current
- From: Christopher Jakubiec <Christopher.Jakubiec@xxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Tue, 09 Mar 2004 08:37:31 -0800
Group,
Does anyone have experience and/or knowledge of the susceptability of ceramic
surface mount capacitors to surge/inrush currents? I have a 48V circuit that
uses a 1uF, 100V, X7R SMD ceramic capacitor and it appears that the capacitors
are shorting out in some cases. I have measured the inrush current during turn
on, and I am finding a current spike on the order of 16A for approximately
40uS, and then the current decays for another 160uS or so. The voltage at turn
on is peaking at about 58V.
Most capacitor manufacturer data sheets that I have looked at do not really
specify this specifically.
Thanks,
Chris Jakubiec
Sun Microsystems
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