Variable Transformer, 12A - MVT3.3k/12A-1E

Variable Transformer, 12A - MVT3.3k/12A-1E


This variable voltage autotransformer provide a trouble free and an efficient means of varying/controlling AC voltages. Variation of the output voltage is achieved by means of a brush arm with a carbon tip which rotates around a silver plated commutator.
This new range uses round carbon brushes, riding any imperfections, giving a smoother operation. They are superior to standard rectangular brushes which are fragile, suffer from breakages and cause a rough action over time.
The side box is opened for access to the M6 terminals studs for connection of the output cable, or the connection as you require.
  • Round carbon brush, low current density
  • Excellent regulation, high efficiency, no waveform distortion.
  • Low operating torque, smooth and linear output.
  • Rugged construction with carry handle, can be used horizontally or vertically.
  • Integral input lead
  • Centre tap in winding for buck-boost applications.



  • Weight (kg): 23.5
  • Height (mm): 280
  • Depth (mm): 250
  • Width (mm): 315
  • Rating: 12A (3.3kVA)
  • Input Voltage: 240V max
  • Output Voltages: Variable 0 to 100%, or 0 to 112% of input
  • Input Plug: Input lead with 13A UK plug
  • Terminals: M6 studs

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