The RHS540D is a heatsink assembly designed for mounting a maximum of three 1-phase solid-state relays (SSRs). It features a thermal resistance of 1.85°C/W and is constructed from black anodized aluminum. The assembly offers flexible installation options with support for both DIN rail and panel mounting. Unlike the standard RHS540 model, the RHS540D is supplied without thermal compound, allowing users to select their own thermal interface material. This RoHS compliant heatsink is ideal for managing thermal dissipation in applications utilizing multiple SSRs.