Instantaneous relays

D-U200N-W Plug-in railway relay with 4 contacts



Plug-in safety critical railway relay with 4 N/O-N/C contacts. Weld-no-transfer contacts are standard, to always guarantee a safe and reliable response also in case of an error. Equipped with back EMF suppression diode (for DC voltages) and magnetic arc blow-out for high breaking capacity and long contact life. Optionally with double make/ double break contacts to further increase the breaking capacity and contact life. Reliable operation in switching high DC loads. Very high reliability for switching low currents even on the long term. The construction of the relay and choice of materials makes the D-U200N-W 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-U200N-W relay an easy and flexible solution to use.


Demanding rolling stock applications such as door control, traction control, braking systems etc. Designed for safety critical applications and extreme reliability, within long endurance applications and harsh environments, for both high and low switching loads.


  • Compact plug-in safety critical relay
  • Instantaneous, 4 N/O - N/C contacts
  • Weld-no-transfer (WNT) contacts
  • Integrated back EMF suppression diode
  • Magnetic arc blow-out for high breaking capacity and long contact life
  • Coil voltages 12 to 250 VDC
  • Maximum continuous current 10 A
  • Maximum switching voltage 250 VDC, 440 VAC
  • Minimum switching current 10 mA (optional 1 mA)
  • Very high reliability low contact load switching
  • Self-cleaning contacts by wiping action
  • Suitable for low temperatures down to -50 °C
  • Mechanical life > 50 million operations
  • Electrical life > 10 million operations at 24 VDC, 0.5 A resistive load
  • Integrated snaplock, no external retaining clip needed
  • Transparent cover for easy visual inspection
  • Flexibility with many options and wide range of sockets
  • Optional positive mechanical keying relay to socket
  • Fully railway compliant

Railway compliancy

  • EN 50155: 2017
  • EN 50121-3-2: 2016
  • IEC 60571: 2012
  • EN 45545-2: 2015
  • IEC 60077-1: 2017
  • NF F16-101/102
  • IEC 60947-5-1: 2016
  • IEC 60947-5-4: 2002
  • IEC 61373: 2010

Product information request

Railway rolling stock
Railway signalling