High power relays mosfet output panel mount crydom d1d40 this 40a 100v dc relay features optically isolated dc mosfet outputs for low resistanfce and safe and efficient high current switching the relay may be connected in parallel for even higher current switching capability typical applications for this relay include resistive and inductive loads such as lighting heating ventilation and drive technology crydom d1d40 solid state relay 40a 35 32vdc