Product Description


VT-EN Series


Robust metal fixing rail, PRI 110/125/230/240 Vac, SEC 110/125/230/240 Vac, 150 - 3,000 VA


  • Very high efficiency
  • Low weight and small size (compared to isolating transformers)
  • Very good moisture protection and low noise thanks to BLOCK IMPEX vacuum impregnation
  • Contact protected screw connection terminals complying with UVV BGV A3
  • Simple mounting thanks to robust metal fixing rail with oval slots



Autotransformers are the efficient and ideal solution for minor voltage adjustments. Compact designs can be provided depending on the voltage difference. Autotransformers feature lower losses compared with isolating transformers with the same power rating. The transformers without galvanic isolation also feature inverse operation. BLOCK's standard range features power outputs of between 150 VA and 250,000 VA

  • Efficient solution for minor voltage adjustments
  • Inverse operation possible
  • Power output: 250 VA to 250,000 VA


  • Autotransformer for adjustment of the voltage on the input and output sides with no requirement for electrical isolation.


Rated Power

150 - 3,000 VA

Maximum Ambient Temperature

40 °C


Class B or E

Degree of Protection

IP 00

Rated Output Voltage

110/125/230/240 Vac

Rated Input Voltage

110/125/230/240 Vac


VDE 0570 Teil 2-13, DIN EN 61558-2-13, EN 61558-2-13, IEC 61558-2-13, UL 5085-1/-2, CSA 22.2 No.66


UL 5085-1/-2, CSA 22.2 No.66

Specifications vary between configurations. Refer to the Configurations below for more information and links to the manufacturer's website.


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