D-U300 relay – Plug-in, 4 pole, AC coil


Plug-in railway relay with 4 change-over contacts suitable for AC coil voltages with a frequency of 50/60 Hz.
Proven reliable operation in switching high DC voltage / inductive loads and low currents. 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 makes the D-U300 relay suitable to withstand corrosive atmospheres, low and high temperatures, shock & vibrating and dry to very humid environments.
Compact design, choice of many options and a wide range of sockets makes the D-U300 relay an easy and flexible solution to use.


Rugged plug-in relays for extreme reliable, long endurance applications in harsh environment. These relay series are designed for demanding rolling
stock applications such as doorcontrols.


  • Compact plug-in design
  • AC coil
  • Instantaneous, 4 C/O contacts
  • 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




    + Inquiry form