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    Variacs

    Variacs are also known as autotransformers and are a speciality type of the electrical transformer that consists only one winding. The winding acts as both primary and secondary sides of the transformer. The ordinary type of transformers have 2 coils instead and they are not electrically connected. The one winding resolution allows for producing a smaller, lighter and cheaper transformers than ordinary 2 winding ones. They also feature lower leakage reactance, lower losses lower excitation current and increased VA rating for a given size and mass. At the other side, the disadvantage is a lack any electrical insulation between circuits. It can result in full input voltage applied to the output.

    Variacs/Autotransformers are commonly used for:

    • Power transmission and distribution – Variacs ensure that voltage at the beginning of the power distribution line is equivalent to the voltage at the end of the line.

    • Power conversions – Variacs are able to convert common domestic mains voltage bands that are in use across the world. For example 200 V to 250 V or 100 V to 130V.

    • Audio systems – Autotransformers are used to adapt speakers to constant- voltage distribution and for matching impendence levels.

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    Product Details
    Price
    Brand
    Primary Voltage Rating
    Secondary Voltage Rating
    Power Rating
    Mounting Type
    Knob Rotation
    Number of Phases
    Number of Outputs
    Termination Type
    Weight
    Dimensions
    Primary Current Rating
    Depth
    Diameter
    Length
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    480VA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    3.8kg
    160 x 130 x 160mm
    2A
    160mm
    -
    160mm
    RS PRO
    240V
    0 → 240V
    240VA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    1.6kg
    86 x 99 x 110mm
    1A
    110mm
    87mm
    113mm
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    170VA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    1.4kg
    83 x 80mm
    0.7A
    96mm
    83mm
    80mm
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    2.4kVA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    9.4kg
    175 x 175 x 170mm
    10A
    170mm
    -
    175mm
    RS PRO
    415V
    0 → 415 V, 0 → 470 V
    16.3kVA
    Surface Mount
    Clockwise
    3
    3
    Wire Termination
    50.1kg
    250 x 300 x 445mm
    20A
    445mm
    -
    250mm
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    170VA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    1.9kg
    160 x 130 x 160mm
    0.7A
    160mm
    -
    160mm
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    1.2kVA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    8.8kg
    175 x 175 x 140mm
    5A
    140mm
    -
    175mm
    RS PRO
    415V
    0 → 415 V, 0 → 470 V
    8.14kVA
    Surface Mount
    Clockwise
    3
    3
    Wire Termination
    33.5kg
    200 x 250 x 425mm
    10A
    425mm
    -
    200mm
    RS PRO
    415V
    0 → 415 V, 0 → 470 V
    1.628kVA
    Surface Mount
    Clockwise
    3
    3
    Wire Termination
    12.9kg
    150 x 200 x 330mm
    2A
    330mm
    -
    150mm
    RS PRO
    240V ac
    0 → 240V ac
    2.4kVA
    Stand Alone
    Clockwise
    1
    -
    Wire Termination
    12kg
    270 x 210 x 200mm
    10A
    200mm
    -
    270mm
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    720VA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    4.3kg
    160 x 130 x 160mm
    3A
    160mm
    -
    160mm
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    480VA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    2.9kg
    110 x 110 x 95mm
    2A
    95mm
    -
    110mm
    RS PRO
    240V
    0 → 240V
    360VA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    2.6kg
    113 x 130 x 127mm
    1.5A
    127mm
    113mm
    113mm
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    4.8kVA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    15.3kg
    225 x 225 x 190mm
    20A
    190mm
    -
    225mm
    RS PRO
    240V ac
    0 → 240V ac
    1.2kVA
    Stand Alone
    Clockwise
    1
    -
    Wire Termination
    10kg
    280 x 200 x 200mm
    5A
    200mm
    -
    280mm
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    6.72kVA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    25kg
    300 x 300 x 225mm
    28A
    225mm
    -
    300mm
    RS PRO
    415V
    0 → 415 V, 0 → 470 V
    1.628kVA
    Surface Mount
    Clockwise
    3
    3
    Wire Termination
    9.1kg
    110 x 110 x 330mm
    2A
    330mm
    -
    110mm
    RS PRO
    240V ac
    0 → 240V ac
    720VA
    Stand Alone
    Clockwise
    1
    -
    Wire Termination
    6kg
    230 x 140 x 140mm
    3A
    140mm
    -
    230mm
    RS PRO
    240V ac
    -
    2.4kVA
    Stand Alone
    Clockwise
    1
    -
    Wire Termination
    12kg
    280 x 200 x 200mm
    10A
    200mm
    -
    280mm
    RS PRO
    240V
    0 → 240 V, 0 → 270 V
    3.6kVA
    Surface Mount
    Clockwise
    1
    1
    Wire Termination
    14kg
    225 x 225 x 190mm
    15A
    190mm
    -
    225mm
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