Bus cables - MVB and WTB - Electron beam cross-linked for high requirements in railway applications

  • Small outer diameters for maximum saving of space and weight
  • Extremely low attenuation ≤ 5 MHz

RailGood chemical resistanceFlame-retardantHalogen-freeLow weightOil-resistantInterference signalsTemperature-resistantUV-resistant

Article number Article designationNumber of cores and mm² per conductorOuter diameter [mm]Copper index (kg/km)
Cables for MVB
UNITRONIC® TRAIN MVB 1x2x0,51x2x0,57.629
UNITRONIC® TRAIN MVB 1x2x0,5+1x0,51x2x0,5+1x0,57.634
UNITRONIC® TRAIN MVB 2x2x0,52x2x0,58.340
UNITRONIC® TRAIN MVB 2x2x0,5+4x0,252x2x0,5+4x0,258.350
Cables for WTB
UNITRONIC® TRAIN WTB 1x2x0,751x2x0,758.441


  • Good chemical resistance please see Appendix T1
  • Resistant to mechanical influences in harsh environmental conditions
  • Extended temperature range
  • Reduced flame spreading increases the protection against damage to persons and property in the event of a fire
  • EMC-optimised design

Application range

  • The communication systems WTB (wire train bus) and MVB (multifunction vehicle bus) make up the so-called TCN (train communication network)
  • UNITRONIC® TRAIN bus cables are designed for use in TCN acc. IEC 61375
    MVB according IEC 61375-3-1
    WTB according IEC 61375-2-1
  • For use in railway vehicles and buses, for fixed installations and applications where limited movement may occur
  • Also applicable within oily environments and areas with increased ambient temperature

Product features

  • Fire behaviour according to EN/IEC:
    - Halogen-free acc. to EN 60754-1
    - No corrosive gases acc. to EN 60754-2
    - No fluorine acc. to EN 60684-2
    - No toxic gases acc. to EN 50305
    - Low smoke density acc. to EN 61034-2
    - Flame-retardant acc. to EN 60332-1-2
    - No fl ame propagation acc. to EN 60332-3-25
  • Fire behaviour according to NF:
    - Toxicity of gases acc. to NF X 70-100
    - Low smoke density acc. to NF X 10-702
    - No flame propagation acc. to NF C 32-070,
    Cat. C1 and C2
  • Chemical properties:
    - Oil resistant acc. to EN 50264-1
    - Fuel resistant acc. to EN 50264-1
    - Acid resistant acc. to EN 50264-1
    - Alkali resistant acc. to EN 50264-1
    - Ozone resistant acc. to EN 50264-3-2

Norm references / Approvals

  • EN 45545-2 HL1, HL2, HL3
  • EN 50264-1

Product Make-up

  • Stranded tinned 19-wire conductor
  • Core insulation: Based on Polyolefin
  • Outer sheath: electron beam cross-linked polymer-compound EM 104
  • Outer sheath colour: Black

Classification ETIM 5

  • ETIM 5.0 Class-ID: EC000830
  • ETIM 5.0 Class-Description: Data cable

Classification ETIM 6

  • ETIM 6.0 Class-ID: EC000830
  • ETIM 6.0 Class-Description: Data cable

Peak operating voltage

  • (not for power applications) 125 V

Minimum bending radius

  • Flexing: 10 x outer diameter
  • Fixed installation: 6 x outer diameter

Test voltage

  • Core/core: 1000 V
  • Core/screen: 1000 V

Characteristic impedance

  • 120 ohm (±10%)

Temperature range

  • Fixed installation:
    -45°C to +90°C
  • Occasional flexing: -35°C up to +90°C

  • Photographs and graphics are not to scale and do not represent detailed images of the respective products.