A silicon controlled rectifier electrostatic discharge protection circuit with external on-chip triggering and compact internal dimensions for fast triggering. In preferred aspects of the invention, the conjugates are of the formula . Fasteners provided on the wings permit attachment of the wings together to form breathable side panels. The internal mounting arrangement provides fasteners internal to the electrical box, thereby enabling retrofitting an old box with no disruption to the surrounding wall. A sealing structure is slidingly engaged with the recess to provide a seal between the cone and shaft.