The vacuum interrupter is a pair of separable contacts (primary contacts), enclosed in a vacuum-tight envelope. The envelope itself is a ceramic material, with a metal end plate brazed to each end. The metal plates seal the ends and provide support for the parts inside.
Of the two contacts (electrodes) inside, one is fixed. The other is movable, through a bellows-type connection. Various shields inside the envelope provide different types of protection to interrupter parts.
A team of scientists and design engineers will create vacuum interrupters to meet customer specifications.