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FDA-U300 relay - Flashing, AC input, 2 pole


Dit product is niet meer verkrijgbaar. Het vervangende relais is de FDA4-U200N.
Klik hier om naar de productpagina van het FDA4-U200N te gaan.


Plug-in electronic railway pulsing relay with two change-over contacts, suitable for AC coil voltages with a frequency of 50/60 Hz. When the relay is activated the coil starts with an interval. The pulse time and interval time are equal. The pulsing frequency is adjustable with a lockable knob. The relay can also be supplier with a fixed pulsing frequency (no knob). The relay is standard equipped with double zener diode coil protection.
The construction of the relay and choice of materials makes the FDA-U300 relay suitable to withstand low and high temperatures, shock & vibrating and dry to humid environments.
No external retaining clip needed as integrated ‘snap-lock’ will hold relay into socket under all circumstances and mounting directions.
Compact design, choice of many options and a wide range of sockets makes the FDA-U300 relay an easy and flexible solution to use.


These relay series are designed for demanding train borne applications. The FDA-U300 is used in applications where a pulse frequency in output is
necessary after activating the relay.


  • Flashing relay (symmetrical)
  • Duty cycle: 1/2
  • AC input
  • Compact plug-in design
  • 2 C/O contacts
  • Pulse time adjustable with a lockable knob
  • Pulse times between 0.5 s...3 s
  • Also available with fixed pulse time
  • Double zener diode coil protection
  • Flat, square and silver plated relay pins for excellent socket connection
  • Integrated snap lock
  • Optional positive mechanical keying relay to socket


  • 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
  • IEC 60947-5-4 Electromechanical components for control applications. This standard examines both coil and contact specifications in depth
  • EN 50121 Electromagnetic compatibility for railway applications
  • NF F 16-101/102, TS 45545-2 Fire behaviour - Railway rolling stock
  • NF F 62-002 On-off contact relays and
    fixed connections



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Railway rolling stock
Railway signalling