EEVblog 1486 - What you DIDN’T KNOW About Film Capacitor FAILURES!

You might think you know how film capacitors fail and degrade in capacitance over time - self-healing due to surges, right? WRONG! Capacitor expert and AVX Fellow Ron Demcko confirms what’s really going on after a teardown of some failed and one good polypropylene X class capacitor. 00:00 - Teardown of a some failed film capacitors 00:52 - Self Healing and drop in capacitance 01:44 - Capacitance Measurements 02:15 - Teardown of a new Suntan brand polypropylene X2 film capacitor 03:03 - Different failure modes based on size and winding pressure 05:52 - Unwrapping the film 07:51 - The film inside a NEW film capacitor 09:19 - Teardown of the FAILED uTx brand heater capacitor with half capacitance 10:06 - How Schoopage and the end pin terminations work 12:23 - Teardown continues... 12:45 - WOW! What on earth is this? 14:54 - Elecami Wolf also did a teardown 16:05 - Teardown continues... 17:01 - Separating the film showing both slef-healing and extensive metal film corrosion 18:29 - Another uTx brand failed film capacitor from a Corsair PSU, with 90% loss in capacitance! Elecami Wolf Youtube Channel: 19:55 - Let’s call an expert! Ron Demcko from AVX tells us the REAL REASON for the failure! It’s moisture ingress and corona demetallization! Full discussion with Ron Demcko: Metallized Film Capacitor Lifetime Evaluation and Failure Mode Analysis report: Film Capacitors construction: Film Capacitors self-healing explanation: #split_content Film Capacitor types: Forum: !/ Support the EEVblog on: Patreon: Odysee: @eevblog:7 Web Site: EEVblog2: EEVdiscover: AliExpress Affiliate: Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! T-Shirts: #ElectronicsCreators #Capacitors #Teardown Теги: eevblog,video,capacitor,capacitors,film capacitors,x2 class capacitor,x class capacitor,class x and class y capacitors,capacitor failure,capacitor self healing,metal film capacitor,corrosion,capacitor corrosion,capacitor moisture,moisture ingress,mains capacitor,polypropylene capacitor,teardown,capacitor teardown,mains surge,film capacitor failure modes,corona demetallization,metallised film,failed capacitor