CU/CP-U900-I relay – Current monitoring


Miniature current monitoring railway relay with one change-over contact. Suitable for AC or DC currents. Very sensitive and high insulation between coil and contact. Relay for plug-in mounting (CU version) or for PCB mounting (CP version).
The construction of the relay and choice of materials makes the CU/CP-U900-I relay suitable to withstand corrosive atmospheres, low and high temperatures, shock & vibrating and dry to very humid environments.
With a very compact design and a wide range of sockets, the CU/CP-U900-I relay is an easy and flexible solution to use.


These relay series are designed for rolling stock applications where available space is limited. The CU/CP-U900-I is used in applications for current monitoring or where switching is activated by a fixed current level.


  • Miniature current monitoring relay
  • Instantaneous, 1 C/O contact
  • AC or DC coil
  • Very sensitive
  • High insulation between coil and contact
  • Flat, square and tin plated relay pins for excellent socket connection / PCB mounting pins
  • Wide range sockets
  • Transparent cover
  • Optional positive mechanical keying relay to socket


  • Proven reliable
  • Long term availability
  • Easy to maintain
  • Used in safety critical applications
  • 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 F 16-101/102, 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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