V99 socket - Spring terminal, wall / rail mount, 8 pole



The V99 is a surface / wall and 35 mm rail mount relay socket. The V99 socket has two spring terminals per relay contact, so looping/daisy chaining can be done on the socket and no external connector or terminal is needed.
The spring terminal makes quick connection possible by pressing the spring with a flat-bladed screwdriver and inserting the stripped wire. Solid and (fine) stranded wire up to 2.5 mm2 can be inserted. 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.
Clear UP arrow for correct 35 mm rail mounting.


The V99 relay socket is suitable for general railway applications with a space saving design. Installation and replacement of relays is made easy and cost saving.
No maintenance is required for the user.
Suitable for all D8 and KDN relay series.


  • Surface / wall and 35 mm rail mount
  • Sturdy spring terminals
  • No internal solderings / connections
  • Touch proof IP20
  • Height saving 35 mm rail mounting
  • Suitable for all D8 and KDN relay series
  • Up to two wires of 2.5 mm2 per relay contact
  • 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

All our relays and accessories are designed according to railway regulations.

  • 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 switch gear and control gear
  • NF F 62-002 On-off contact relays and fixed connections 

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Railway rolling stock
Railway signalling