1.Load>10A, need mounting radiator; 2.Load>80A, need Cooling Fan or Cooling Water (SSR Radiator,solid state relay radiator, r Radiator for SSR HH-034Used for 3-phase SSR less than 30A.Output Current ≤30A, L=105mm, W=100mm,H=80mmRemarks: Vertical(SSR Radiator,solid state relay radiator, relay)Pls contact us for detailed specification! SSR Radiator (HH-034)