Mide Technology PPA Piezoelectric Energy Harvesting Modules offer Piezo Protection Advantage (PPA) in a range of rectangular piezoelectric packages designed for the cantilever, bonded, or fixed beam configurations. PPA is a patented manufacturing process that encapsulates high-performance brittle piezo ceramics between copper-clad insulating materials. This manufacturing process creates a robust, hermetically sealed, electrically insulated transducer with an easy connection that is ready to integrate into your system or application.