V29 socket - Spring clamp terminal, wall/rail mount



The V29 is a surface / wall and 35 mm rail mount relay socket. The V29 socket has two highly reliable spring clamp terminals per relay contact, so looping/daisy chaining can be done on the socket and no external connector or terminal is needed.
The spring clamp terminal makes a quick connection possible by pressing the spring with a flat-bladed screwdriver and inserting the stripped wire. Solid and (fine) stranded wires up to 2.5 mm2 can be inserted in the spring clamp terminals. This quick & easy wiring method saves up to 75% wiring time compared with classic technology, like screw terminals.
To prevent fault relay placement the socket can be equipped with mechanical keying to accept only designated identical keyed relays.


The V29 relay socket is suitable for general railway applications with a space saving design. Installation and replacement of relays is made easy and cost saving.
Suitable for all D-U relay series.


  • Surface / wall and 35 mm rail mount
  • Sturdy spring clamp terminals
  • Twin connection per relay contact
  • No internal solderings / connections
  • Touch proof IP20
  • Height saving 35 mm rail mounting
  • Suitable for all D-U relay series
  • Easy & quick installation (up to 75% reduction of wiring time)
  • Positive mechanical keying
  • Trifurcated female receiver for tight grip relay pin
  • Clear terminal ID


  • 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
  • NF F 16-101/102, TS 45545-2 Fire behaviour - Railway rolling stock
  • IEC 60715 Dimensions of low voltage switchgear and controlgear - mounting rail
  • NF F 62-002 On-off contact relays and fixed connections

Product information request

Railway rolling stock
Railway signalling