Block ST 400V to 230V Transformers

Block Brand: Block

Block ST 400V to 230V Transformers are low inrush current control, safety, or isolation current transformers with screw connection terminals. Designed with a very good switch-on behaviour thanks to reduced starting currents, plus high performance for the volume thanks to compact design, these high quality transformers offer excellent corrosion protection and low noise due to BLOCKIMPEX vacuum impregnation.

  • Contact protected screw connection terminals - comply with UVV BGV A3
  • Simple mounting - robust metal footplate with oval slots
  • Natural cooling
    • Description Image Product Buy Pricing (Ex VAT) Height Length Power Width Primary Voltage Secondary Voltage
    Block ST 160/4/23, 160VA Transformer, 400V to 230V
    Block ST 160/4/23, 160VA Transformer, 400V to 230V
    Extended range
    Order code: 51-5266
    MPN: ST 160/4/23

    Available to back orderBack order, lead time 11 days
    1+ £61.91
    Price per unit Ex VAT     		105mm 96mm 160VA 88mm 400V 230V
    Block ST 500/4/23, 500VA Transformer, 400V to 230V
    Block ST 500/4/23, 500VA Transformer, 400V to 230V
    Extended range
    Order code: 51-5289
    MPN: ST 500/4/23

    22 available to back orderBack-order availability date - 19/12/2025
    1+ £120.98
    Price per unit Ex VAT     		123mm 120mm 500VA 122mm 400V 230V
    Order code51-525651-526651-5289
    Ambient temperature range+40°C (max)+40°C (max)+40°C (max)
    ConstructionOpenOpenOpen
    Efficiency86%86%91%
    FixingBase plateBase plateBase plate
    Fixing typeM4 screwsM5 screwsM5 screws
    Frequency50-60Hz50-60Hz50-60Hz
    Power100VA160VA500VA
    Primary voltage400V400V400V
    Secondary current435mA695mA2.17A
    Secondary voltage230V230V230V
    Test voltage2500V2500V2500V
    TypeST 100/4/23ST 160/4/23ST 500/4/23


    Trustpilot