Electronic – Replace foil caps with ceramic caps

battery-chargingcapacitor

I am repairing a battery pack (see below) which has some old foil capacitor (100nF) between a sense Terminal and the negative (together with a NTC thermistor).

Can I replace the foil cap with a X7R ceramic cap?

Best Answer

Yes, a leaded X7R capacitor should be fine to replace the film capacitor pictured. There is probably no reason to do so, other than to make it a bit smaller- I would not expect that capacitor to ever fail.

The cap is probably there to reduce noise in the temperature measurement (which would be used for charge termination so noise could truncate the charge cycle).