Crydom cwa2490 solid state load relays emc compliant dbc panel mount crydom cwa2490 a 90a solid state load relay with an operating voltage of 24 to 280v ac a control voltage of 90 to 280v ac and zero cross turn on switching mode this panel mounting device has a hockey puck type standard industrial housing and an aluminium dbc substrate that maximises thermal management the relay is emc compliant and has an optically isolated scr output that gives high switching loads in industrial applic