On Board Disconnector Switch

85VDC On Board Disconnectors Switch

Disconnectors FA range 85VDC 125 to 630Amp

For more than 100 years, Mersen have been providing the market with safe, reliable and longer life time off-load disconnectors. These devices offer high performances and robustness for heavy duty requirements with very limited maintenance. Mersen offers one of the largest product ranges on the market for On-Board applications under 85VDC, 750VDC, 1,500VDC, 3,000VDC and 25kVAC. Mersen has a switch solution that will meet your unique needs. Our standard On-Board Type A disconnector range is rigorously engineered to meet your technical specifications in different configurations (Disconnector, Change-over, earthing). Operation : They are operated manually up to 25.000 cycles. Phase to Phase distance, Signaling, Terminal Box or Locking system can be studied and customised. Indoor use in a currentless state



  • No Load operation, Indoor Type equipment
  • This technology offer various configurations
  • - Disconnector or Change-over or Earthing
  • - 1 to 2 different positions
  • - 1 to 4 poles offering different ratings
  • Mechanical endurance : 25.000 cycles minimum warrantied.
  • High short-circuit currents withstand
  • Electrical contact by connecting plates and movable contacts silvered copper.
  • Temperature rise at nominal current is less than 40°K (with 70°C max. ambient temperature)
  • Visible break by direct seeing of the mobile silver-plated copper contacts.
  • Large isolation air and creepage distance.
  • Easy connections to Copper busbar by bolting and self-supporting.
  • Self-cleaning blade contacts, ideal for polluted environments.


  • Size per Standard On Board Disconnectors A 125 to 630 Amp for DC under 85VDC
  • Number of Poles 1 to 4 poles with same or different current ratings (for more poles please consult)
  • Standards IEC 60077-1
    IEC 60077-2
    IEC 61373
    EN 50124
  • Application Battery isolation, auxilary circuit
    Power control with the possible functions to disconnect, to change-over or to earth the power source of rolling stock applications (Train, Tramway, Metro)
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Yes


  • A 10 1P 125A TSDC
  • A 10 1P 200A TSDC
  • A 10 1P 320A TSDC
  • A 10 1P 630A TSDC
  • A 10 2P 125A TSDC
  • A 10 2P 200A TSDC
  • A 10 2P 320A TSDC
  • A 10 2P 630A TSDC
  • A 12 2P 125A TSDC
  • A 12 2P 200A TSDC
  • A 12 2P 320A TSDC
  • A 12 2P 630A TSDC


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