Timer relais

WDDE-U200 relay - Instantaneous 2 pole and one-shot 2 pole



Plug-in electronic railway one shot timer relay with two instantaneous change-over contacts and two one shot change-over contacts. When the relay is activated the one shot change-over contacts are activated with one pulse. The pulse time is adjustable with a lockable knob. The relay can also be supplied with a fixed pulse time (no knob). The relay is equipped with two LEDs to indicate presence of power supply and energizing of the coil.
The construction of the relay and choice of materials make the WDDE-U200 /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 WDDE-U200/U300 relay an easy and flexible solution to use.


These relay series are designed for demanding rolling stock applications.
The WDDE-U200/U300 is used in applications where instantaneous contacts and contacts with one pulse in output are necessary.


  • One-shot time delay and instantaneous relay
  • Compact plug-in design
  • 2 C/O one-shot contacts and 2 C/O instantaneous contacts
  • Pulse time adjustable with a lockable knob
  • Pulse times between 0.1 s...60 min
  • Also available with fixed pulse time (no knob)
  • Two LEDs for status indication
  • 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 60947-5-1 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, EN 45545-2 Fire behaviour - Railway rolling stock



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Railway rolling stock
Railway signalling