Capacitors – Do Capacitors Need to Be Blown or Bulged to Be Bad?


The title says it all, I'm wondering if an electrolytic (or any other type) capacitor needs to be bulged to be bad?

Best Answer

No, they don't. There are various failure mechanisms, some of which don't exhibit bulging of the case. Also bulging is pretty much limited to electrolytics. Ceramics and other types don't do that because there isn't liquid electrolyte inside that can be electrolyzed, emit gasses, and thereby build up pressure.