•   3RF General data
  • Solid-state relays (without heat-sink) SIRIUS 3RF2 solid-state relays are suitable for surface mounting on existing cooling surfaces. Mounting is quick and easy, involving just two screws. The special technology of the power semiconductor ensures there is excellent thermal contact with the heat sink. Depending on the nature of the heat sink, the capacity reaches up to 88 A on resistive loads. The solid-state relays are available in 3 different widths: 3RF21 single-phase solid-state relay with a width of 22.5 mm; 3RF20 single-phase solid-state relay with a width of 45 mm; Three-phase 3RF22 solid-state relay with a width of 45 mm; The 3RF21 and 3RF22 solid-state relays can be expanded with various function modules to adapt them to individual applications.

  • Solid-state contactors (with heat-sink) The complete units consist of a solid-state relay plus optimized heat sink, and are therefore "ready to use". They offer defined rated currents to make selection as easy as possible. Depending on the version, current strengths of up to 88 A are achieved. It also offers all the special features of the solid-state relay with regard to saving time and money. With their insulated mounting foot they can easily be snapped onto a standard mounting rail, or they can be mounted on support plates with fixing screws. This insulation enables them to be used in circuits with protective extra-low voltage (PELV) or safety extra-low voltage (SELV) in building management systems. For other applications, such as for extended personal safety, the heat sink can be grounded through a screw terminal. The solid-state contactors are available in 2 different versions: 3RF23 single-phase solid-state contactors, 3RF24 three-phase solid-state contactors

  • Function modules for SIRIUS solid-state switching devices A great variety of applications demand an expanded range of functionality. With our function modules, these requirements can be met really easily. The modules are mounted simply by clicking them into place; straight away the necessary connections are made with the solid-state relay or contactor. The plug-in connection to control the solid-state switching devices can simply remain in use. The following function modules are available: Converter (for single-phase and three-phase switching devices); Load monitoring; Heating current monitoring; Power controllers; Power regulators.