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RC-19A relay - Current monitoring

This relay is obsolete from January 1, 2023


Current monitoring railway relay with one change-over contact. Suitable for AC currents. The input consists of a ring core saturation transformer: place the wire with current to monitor simply through the transformer. Ease of installation and high continuous overcurrent possible. Protection against short circuit and low impedance. The relay is also suitable for earthfault protection.
Adjusting the pull-in current for lower values by multiple threading through the transformer.
The construction of the relay and choice of materials makes the RC-19A relay suitable to withstand low and high temperatures, shock & vibrating and dry to very humid environments.
No external socket necessary, the relay can be mounted on any surface via 2 screws.


These relay series are designed for demanding rolling stock applications. The RC-19A is used in applications for current monitoring or earth fault protection.


  • AC current monitoring relay
  • Compact design
  • 1 C/O contact
  • Easy installation
  • High continuous overcurrent possible
  • Protection against short circuit and low impedance
  • Also suitable for earth fault protection


  • 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 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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Railway rolling stock
Railway signalling