Crydom has combined solid state and mechanical switching technologies to create its line of Hybrid Solid State Contactors. The RHP contactors (patent pending) provide the performance advantages of both technologies in an industry standard DP contactor package. Crydom’s proven Hybrid SSR technology utilizes contactless solid state turn on and turn off performance, coupled with the very low on state power dissipation characteristic of contactors. This combination results in a fast switching highly reliable contactor that does not require the use of a heat sink. More information here.