Carlo Gavazzi RHS Series Heat Sinks for Solid State Relays (SSRs) are available with DIN, thru-wall, or panel mount designs and up to 4°C/W thermal resistance. These heat sinks are suitable for mounting on 1 x 1-phase, 1 x 3-phase, 2 x 1-phase, 3 x 1-phase, or 9 x 1-phase SSRs depending on the model. Carlo Gavazzi RHS Series Heat Sinks come in dimensions that range from 18mm x 110mm x 52mm to 300mm x 200mm x 40mm.