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

UV-resistant Temperature-resistant Interference signals Oil-resistant Low weight Halogen-free Good chemical resistance Rail Flame-retardant

Article number Article designation Number of cores and mm² per conductor Outer diameter [mm] Copper index (kg/km)
Cables for MVB
UNITRONIC® TRAIN MVB 1x2x0,5 1x2x0,5 7.4 29
UNITRONIC® TRAIN MVB 1x2x0,5+1x0,5 1x2x0,5+1x0,5 7.4 34
UNITRONIC® TRAIN MVB 2x2x0,5 2x2x0,5 8.1 40
2173003 UNITRONIC® TRAIN MVB 2x2x0,5+4x0,25 2x2x0,5+4x0,25 8.1 50
Cables for WTB
UNITRONIC® TRAIN WTB 1x2x0,75 1x2x0,75 8.4 41


  • Good chemical resistance
  • Resistant to mechanical influences in harsh environmental conditions
  • Extended temperature range
  • Reduced flame spreading for 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 according to IEC 61375.
    MVB according to IEC 61375-3-1
    WTB according to IEC 61375-2-1
  • For use in railway vehicles and buses, for fixed installation and applications where limited movement is to be expected
  • Can also be used in oily environments and areas with increased ambient temperature

Product features

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

Norm references / approvals

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


  • tin-plated copper strands, 19-wire
  • Polyolefin-based core insulation
  • Sheath: Electron beam cross-linked polymer-compound EM 104
  • Sheath colour: Black


  • ETIM 5.0 Class-ID: EC000830
  • ETIM 5.0 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/Shield: 1000 V

Characteristic impedance

  • 120 ohm (±10%)

Temperature range

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

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