Block STU Transformers 24V

Block Brand: Block

Block STU 24V Transformers are low inrush current control, safety, or isolation current transformers with screw connection terminals. Designed with very good switch-on behaviour thanks to reduced starting currents, plus high performance for the volume due to compact design, these high quality tranfsormers also have excellent corrosion protection and low noise with 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 STU 100/24, 100VA Transformer, 24V
    Block STU 100/24, 100VA Transformer, 24V
    Extended range
    Order code: 51-5317
    MPN: STU 100/24

    6 available to back orderBack-order availability date - 19/12/2025
    1+ £55.55
    Price per unit Ex VAT     		94mm 84mm 100VA 76mm 210 / 230 / 250 / 380 / 400 / 420 / 440 / 460 / 480 / 500 / 520 / 540V 24V
    Block STU 130/24, 130VA Transformer, 24V
    Block STU 130/24, 130VA Transformer, 24V
    Extended range
    Order code: 51-5320
    MPN: STU 130/24

    2 available to back orderBack-order availability date - 19/12/2025
    1+ £65.65
    Price per unit Ex VAT     		105mm 96mm 130VA 78mm 210 / 230 / 250 / 380 / 400 / 420 / 440 / 460 / 480 / 500 / 520 / 540V 24V
    Block STU 800/24, 800VA Transformer, 24V
    Block STU 800/24, 800VA Transformer, 24V
    Extended range
    Order code: 51-5329
    MPN: STU 800/24

    4 available to back orderBack-order availability date - 19/12/2025
    1+ £174.77
    Price per unit Ex VAT     		150mm 150mm 800VA 128mm 210 / 230 / 250 / 380 / 400 / 420 / 440 / 460 / 480 / 500 / 520 / 540V 24V
    Order code51-531751-532051-532451-5326

    51-5329

    Ambient temperature range+40°C (max)+40°C (max)+40°C (max)+40°C (max)+40°C (max)
    ConstructionOpenOpenOpenOpenOpen
    Efficiency86%86%90%91%92%
    FixingBase plateBase plateBase plateBase plateBase plate
    Fixing typeM4 screwsM5 screwsM5 screwsM5 screwsM6 screws
    Frequency50-60Hz50-60Hz50-60Hz50-60Hz50-60Hz
    Power100VA130VA250VA400VA800VA
    Primary voltage210-540V210-540V210-540V210-540V210-540V
    Secondary current4.17A5.42A10.42A16.67A33.33A
    Secondary voltage24V24V24V24V24V
    Test voltage2500V2500V2500V2500V2500V
    TypeSTU 100/24STU 130/24STU 250/24STU 400/24STU 800/24


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