Crydom h16wd series solid state relay dc control panel mount crydom h16wd6025g a 25a dc control solid state relay that features 1600v blocking and an scr output for heavy industrial loads operating voltage is 48 to 600v ac and the control voltage is 4 to 32v dc crydom h16wd6025g solid state relay 660vac 25a max 4 32vdc control voltage