After Market Relays

BD-U200 relay - Latching, plug-in 4 pole



Plug-in bistable railway relay with three change-over contacts and one normally closed contact. The contacts remain in the last powered position. Bistable by means of a permanent magnet.
Standard equipped with magnetic arc blow-out for high breaking capacity and long contact life. No external retaining clip needed as integrated ‘snap-lock’ will hold relay into socket under all circumstances and mounting directions.
The construction of the relay and choice of materials make the BD-U200 relay suitable to withstand corrosive atmospheres, low and high temperatures, shock & vibrating and dry to humid environments.
Compact design, choice of many options and a wide range of sockets makes the BD-U200 relay an easy and flexible solution to use.


This relays are designed for demanding rolling stock applications. The BD-U200 is used in applications where the contacts are set and reset with permanent power or impulses.


  • Latching (bistable) relay
  • Compact plug-in design
  • 2 combined coils
  • 3 C/O contacts and 1 N/C contact
  • Magnetic arc blow-out
  • Flat, square silver plated relay pins for excellent socket connection
  • Wide range of sockets
  • Integrated snap lock
  • Transparent cover
  • High DC breaking capacity
  • Optional positive mechanical keying relay to socket
  • Flexibility by many options


  • Proven reliable
  • Long term availability
  • Easy to maintain
  • Low life cycle cost
  • No maintenance

Railway compliancy

  • EN 50155 Electronic equipment used on rolling stock for railway applications
  • IEC 60571 Electronic equipment used on railway vehicles
  • IEC 60077 Electrical equipment for rolling stock in railway applications
  • IEC 60947 Low voltage switch gear and control gear
  • IEC 61373 Rolling stock equipment - Shock and vibration test
  • EN 50121 Electromagnetic compatibility for railway applications
  • NF F16-101/102, TS 45545-2 Fire behaviour - Railway rolling stock
  • IEC 60529 European standard describes the protection class (IP-code)
  • NF F 62-002 On-off contact relays and fixed connections



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Railway rolling stock
Railway signalling