Finder 25a 3 phase solid state relays with heatsink sip crydom pf240d25 a 25a pcb mounting solid state relay with a switching voltage range of 12 to 280v ac and a control voltage range of 3 to 15v dc the relay has an integrated heatsink and an scr output for use with heavy industrial loads crydom pf240d25 solid state relay module 25a 3 15vdc