The CMRD4835 from Crydom is single pole single throw SPST (1 Form A) solid state relay with integrated heat sink, NO contact configuration and screw terminal. This relay has AC, zero cross output and 35A, 48 to 530V load ratings. Operates at input voltage range from 4 to 32VDC. Dimensions of this relay with heat sink are: 3.0" (76.2mm) x 1.75" (44.5mm) x 4.3" (109.2mm).