Os disjuntores virtuais usam relés de estado sólido :
A solid-state relay (SSR) is an electronic switching device that switches on or off when a small external voltage is applied across its control terminals.
The relay may be designed to switch either AC or DC to the load. It serves the same function as an electromechanical relay, but has no moving parts.
De acordo com o Boeing para o seu 787:
The remote power distribution units (RPDUs) are largely based on solid-state power controllers (SSPC) instead of the traditional thermal circuit breakers and relays.
Os padrões para controladores de potência de estado sólido em aeronaves são definidos por BS ISO 8816 .
Relacionados: Onde estão os disjuntores no 787?