Thyristor speed controllers enable manual speed control of fans with 230V/50Hz single-phase motors. When installed with the enclosed surface-mounted housing, the protection class of the control unit is IP 54. When flush-mounted without the surface-mounted housing, the protection class is IP 44. Several motors can be connected in parallel as long as the total current does not exceed the rated current of the controller. When selecting a suitable control unit, the starting currents of the fans must be taken into account. Fans that are operated with this control unit must have built-in overheating protection and be suitable for operation with a thyristor controller.

Speed controller STX 1.5 Rated voltage 230 V, infinitely variableFeatures:Made in Germany quality, protection class IP 44 for safety in the homeSpeed controller - for easy installationStepless control. Minimum speed adjustable. Splash-proof. With LED operating indicator. Switch on the fan by turning the control knob. Includes spare fuse.Attractive design - compatible with any interior styleSuitable for continuous operation.Description:Speed controller for infinitely variable control of fans. Minimum speed adjustable. Can be used for surface and flush mounting, exception: STX 4 only for surface mounting. Functional principle: Phase angle control. Recommended distance from radio and television sets: 3 m. Switch on the fans at maximum speed by turning the control knob. Further turning reduces the speed. Splash-proof. Built-in temperature cut-out. Orange LED operating indicator. CE mark. Including spare fuse. Additional switching contact (230 V), e.g. for activating a flap. Due to the phase control technology, a physically induced humming noise may occur in the lower speed range. Therefore, in rooms requiring low-noise fan operation, use 5-step transformers TRE... for speed control. Installation on walls possible, avoid installation on ceilings due to temperature development. STX 1.5, STX 2.5: Width x height x depth when used for surface mounting: 82 mm x 89 mm x 69 mm, width x height x depth when used for flush mounting: 50 mm x 50 mm x 33 mm, STX 4: Width x height x depth when used for surface mounting: 82 mm x 89 mm x 69 mmArticle: STX 1.5, Voltage type: AC, Rated voltage: 230 V, Maximum load: 1.5 A, Minimum load: 0.1 A, Protection rating: IP 44, Installation type: Surface-mounted or flush-mounted, Colour: White, similar to RAL 9010, Weight: 0.1638 kg, Weight with packaging: 0.196 kg, Width: 82 mm, Height: 89 mm, Depth: 69 mm, Width with packaging: 85 mm, Height with packaging: 95 mm, Depth with packaging: 70 mm, Suitable for box ventilators: no, Suitable for roof ventilators: yes, Suitable for duct ventilators: yes, Suitable for heat recovery systems: no, Suitable for wall-mounted ventilators: yes, Suitable for wall-mounted ventilators: yes, Suitable for domestic ventilators: yes, Suitable for centrifugal ventilators: no, Suitable for circulation ventilators: no

Speed controller STX 2.5 Rated voltage 230 V, infinitely variableFeatures:Made in Germany quality, protection class IP 44 for safety in the homeSpeed controller - for easy installationStepless control. Minimum speed adjustable. Splash-proof. With LED operating indicator. Switch on the fan by turning the control knob. Includes spare fuse.Attractive design - compatible with any interior styleSuitable for continuous operation.Description:Speed controller for infinitely variable control of fans. Minimum speed adjustable. Can be used for surface and flush mounting, exception: STX 4 only for surface mounting. Functional principle: Phase angle control. Recommended distance from radio and television sets: 3 m. Switch on the fans at maximum speed by turning the control knob. Further turning reduces the speed. Splash-proof. Built-in temperature cut-out. Orange LED operating indicator. CE mark. Including spare fuse. Additional switching contact (230 V), e.g. for activating a damper. Due to the phase control technology, a physically induced humming noise may occur in the lower speed range. Therefore, in rooms requiring low-noise fan operation, use 5-step transformers TRE... for speed control. Installation on walls possible, avoid installation on ceilings due to temperature development. STX 1.5, STX 2.5: Width x height x depth when used for surface mounting: 82 mm x 89 mm x 69 mm, width x height x depth when used for flush mounting: 50 mm x 50 mm x 33 mm, STX 4: Width x height x depth when used for surface mounting: 82 mm x 89 mm x 69 mmArticle: STX 2.5, Voltage type: alternating current, Rated voltage: 230 V, Maximum load: 2.5 A, Minimum load: 0.2 A, Protection rating: IP 44, Installation type: surface or flush-mounted, Colour: white, similar to RAL 9010, Weight: 0.1625 kg, Weight with packaging: 0.195 kg, Width: 82 mm, Height: 89 mm, Depth: 69 mm, Width with packaging: 85 mm, Height with packaging: 95 mm, Depth with packaging: 70 mm, Suitable for box ventilators: no, Suitable for roof ventilators: yes, Suitable for duct ventilators: no, Suitable for heat recovery systems: no, Suitable for wall-mounted ventilators: no, Suitable for wall-mounted ventilators: yes, Suitable for domestic ventilators: no, Suitable for centrifugal ventilators: no, Suitable for circulation ventilators: no

Speed controller STSX 2.5 Rated voltage 230 V, infinitely variableFeatures:Made in Germany quality, protection class IP 30 for safety in the homeSpeed controller - for easy installationFor one direction of rotation for stepless regulation of fans. Green LED operating indicator. Attractive design - compatible with any interior styleSuitable for continuous operation.Description:Speed controller for stepless regulation of fans. VDE-tested. For one direction of rotation. Installation on 35 mm standard profile rail possible. Green LED operating indicator. Due to the phase control technology, a physically induced humming noise can occur in the lower speed range. In rooms requiring low-noise fan operation, 5-step transformers TRE... ##########_0__: STSX 2.5, Voltage type: AC, Rated voltage: 230 V, Maximum load: 2.5 A, Minimum load: 0.1 A, Protection rating: IP 30, Installation type: Distribution panel / switch cabinet, Colour: Light grey, similar to RAL 7035, Weight: 0.0985 kg, Weight with packaging: 0.123 kg, Width: 35 mm, Height: 94 mm, Depth: 86 mm, Width with packaging: 40 mm, Height with packaging: 95 mm, Depth with packaging: 96 mm, Suitable for box ventilators: no, Suitable for roof ventilators: yes, Suitable for tube ventilators: yes, Suitable for heat recovery systems: no, Suitable for wall-mounted ventilators: yes, Suitable for wall-mounted ventilators: yes, Suitable for domestic ventilators: yes, Suitable for centrifugal ventilators: no, Suitable for circulation ventilators: no

Speed controller STX 4 Rated voltage 230 V, infinitely variableFeatures:Made in Germany quality, protection class IP 44 for safety in the homeSpeed controller - for easy installationStepless control. Minimum speed adjustable. Splash-proof. With LED operating indicator. Switch on the fan by turning the control knob. Includes spare fuse.Attractive design - compatible with any interior styleSuitable for continuous operation.Description:Speed controller for infinitely variable control of fans. Minimum speed adjustable. Can be used for surface and flush mounting, exception: STX 4 only for surface mounting. Functional principle: Phase angle control. Recommended distance from radio and television sets: 3 m. Switch on the fans at maximum speed by turning the control knob. Further turning reduces the speed. Splash-proof. Built-in temperature cut-out. Orange LED operating indicator. CE mark. Including spare fuse. Additional switching contact (230 V), e.g. for activating a flap. Due to the phase control technology, a physically induced humming noise may occur in the lower speed range. Therefore, in rooms requiring low-noise fan operation, use 5-step transformers TRE... for speed control. Installation on walls possible, avoid installation on ceilings due to temperature development. STX 1.5, STX 2.5: Width x height x depth when used for surface mounting: 82 mm x 89 mm x 69 mm, width x height x depth when used for flush mounting: 50 mm x 50 mm x 33 mm, STX 4: Width x height x depth when used for surface mounting: 82 mm x 89 mm x 69 mmArticle: STX 4, Voltage type: alternating current, Rated voltage: 230 V, Maximum load: 4 A, Minimum load: 0.4 A, Protection rating: IP 44, Installation type: surface-mounted, Colour: white, similar to RAL 9010, Weight: 0.2312 kg, Weight with packaging: 0.263 kg, Width: 82 mm, Height: 89 mm, Depth: 69 mm, Width with packaging: 85 mm, Height with packaging: 95 mm, Depth with packaging: 70 mm, Suitable for box ventilators: no, Suitable for roof ventilators: no, Suitable for duct ventilators: no, Suitable for heat recovery systems: no, Suitable for wall-mounted ventilators: no, Suitable for wall-mounted ventilators: yes, Suitable for domestic ventilators: no, Suitable for centrifugal ventilators: no, Suitable for circulation ventilators: no