Ceramic capacitor current ripple

[ivenzar]

Hello,

A 100V , x7r, 1210, 4.7uC capacitor is used. A rms current of 2 Amps flows over it. It's ESR its 0.006 Ohms.
It's maximum rated temperature is 125 ºC.
How can I know if the capacitor is able to work with that current. No Rth, nor maximum current, nor maximum are given in the datasheet.

Thanks

 

[KlausST]

Hi,

let´s assume the ESR is the only "power dissipating" part.
Then P_tot = I * I * ESR = 2A x 2A x 0.006 Ohms = 0.024W = 24mW.

--> Should be no problem for a 1210 sized device.

******

Is it too difficult to give us a link to the (complete) datasheet?
Maybe there references to other documents...Or there are additional informations at the manufacturer´s internet site.

Klaus

 

[schmitt trigger]

Same comment as Klaus.
Reputable capacitor manufacturers will provide ripple current limit values somewhere in the datasheet.

Sometimes the value is not found on the individual capacitor datasheet but as a global family specification.

 

[ivenzar]

Hi,

let´s assume the ESR is the only "power dissipating" part.
Then P_tot = I * I * ESR = 2A x 2A x 0.006 Ohms = 0.024W = 24mW.

--> Should be no problem for a 1210 sized device.

******

Is it too difficult to give us a link to the (complete) datasheet?
Maybe there references to other documents...Or there are additional informations at the manufacturer´s internet site.

Klaus

I have just founded the graph I need. RMSCurrent vs Temperature increase.
Thanks