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  •   Transformer fan motor speed controller with TK | 7.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | STRS1-75L22 | 5401003016060
      Transformer fan motor speed controller with TK | 7.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | STRS1-75L22 | 5401003016060 1
      Transformer fan motor speed controller with TK | 7.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | STRS1-75L22 | 5401003016060 2
      Transformer fan motor speed controller with TK | 7.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | STRS1-75L22 | 5401003016060 3

    Transformer fan motor speed controller with TK | 7.5A | 230VAC | surface-mounted | IP54 | Sentera Controls | STRS1-75L22 | 5401003016060

    Code: STRS1-75L22
    Barcode: 5401003016060
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    Price 228.69 € VAT incl.
    ( 189.00 € VAT excl. )
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    Transformer fan speed controller with TK (thermal protection) terminals – a reliable and quiet solution for speed control of single-phase AC fans and other voltage-controlled motors. Thanks to autotransformer technology, the controller ensures a perfect sinusoidal output voltage, allowing the motor to operate stably without humming or additional electromagnetic noise. Integrated TK terminals allow safe connection of the motor’s thermal protection – in the event of a fault, the output is automatically switched off, and a red indication clearly informs about the malfunction.

    The controller is intended for single-phase, voltage-controlled motors. Speed is controlled in 5 steps by changing the motor supply voltage. The autotransformer has 6 voltage outputs, so if necessary, the step arrangement can be changed and the control adapted to a specific fan or system.  

  • Product description

    Technical specifications

    Power supply voltage: 230 VAC / 50–60 Hz
    Maximum load: 7,5 A
    Control type: transformer (autotransformer)
    Speed steps: 5
    Available output voltages: 0 – (80) – 110 – 140 – 170 – 190 – 230 VAC
    Unregulated output: 230 VAC / 2 A
    Enclosure: plastic (R-ABS, UL94-V0), grey RAL 7035
    Dimensions: 305x200x140mm
    Mounting: surface-mounted
    Protection class: IP54 (EN 60529)
    Operating temperature: −20 … +35 °C
    Relative humidity: 5–95 % rH (non-condensing)
    Fuse: T-12,5 A-H (5×20 mm)
    Indication: LED (power / fault) 

    Main functions

    5-step manual control via rotary switch (with OFF position)
    TK terminals for motor thermal protection connection
    Automatic shutdown when thermal protection is triggered
    Red fault indication on the cover
    Perfect sine wave – quiet and long-lasting motor operation
    Unregulated 230 VAC output for additional needs

    Usage

    For household users: Suitable for speed control of home ventilation, heat recovery or auxiliary fans. Simple and reliable control without complex settings
    For electricians: Fast surface-mounted installation. Clear terminals, safe connection, integrated protection. Reliable solution for technical rooms, basements, utility areas.
    For engineers / designers: Stable, low-noise solution for sensitive systems. Ability to optimize voltage steps according to a specific motor. IP54 compliance – suitable for more demanding environmental conditions.

    Pros

    Quiet motor operation
    Integrated TK terminals – higher safety level
    Reliable and long-lasting transformer-based solution
    IP54 – suitable for dusty and more humid rooms
    Simple, clear manual control

    Cons

    Only 5 fixed steps (no smooth control)
    Designed only for single-phase, voltage-controlled motors 

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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