So we had a few transistors in to-220 pacs de-laminate at the metal tab/ plastic interface. (lost electrical connection to the collector.)
These take a lot of force and have less defection than other belleville's. I also think they were put in with too much force.
I'm wondering if there are any spec's for lock washers on TO-220 pacs? These are being used as temperature sensors over a large range, so I do want a lot of compliance (or deflection.)
Thanks George H.