Direct schakelende relais

AK 400 safety relay



The AK 400 relay has 4 double make / double break C/O contacts (form Z). It is conform the French standard NF F 70-031 section 7.1.2. and 7.1.3. which specified no welding when contacts are closed on a 200 Amps 30 V short circuit protected by 6 A/400 V G1 fuse and no welding when contacts are closed on a 200 μF capacitor charged at 330 VDC.
The resistance to impact and vibration is conform to standards in force for Railway Transported Equipment.
Positive mechanical keying of relay to socket is built into relay and socket during manufacture and terminal identifications are clearly marked on identification plate that is permanently attached to the relay.
The AK 400 relays is pluggable in the following sockets: EA 102 A, EA 102 AF, EA 103 AF, EA 104 A, EA 104 AF, EA 105 AF, EA 112 AF.


The AK relay is designed heavy duty applications where a high degree of resistance to welding is required. Stationary contacts are silver tin oxide. Mobile contacts are hard silver laminated to copper. In a power interruption situation relay armature will assure a “safe” position. This is due to the strength of the 2 compressed springs which pushes the armature back into the rest position.


  • Instantaneous relay
  • Optional Weld no tranfer contacts for safety critical applications
  • Weld resistant
  • 4 double make - double break C/O contacts (form Z), 8 A
  • Plug-in design with secure locking feature for maximum ease of maintenance
  • Contact life (mechanical) of 100 million cycles
  • -40 °C...+80 °C operating temperature


  • Proven reliable in heavy duty application
  • Optional Weld no transfer
  • Long life cycle
  • Easy to maintain and replace
  • Low life cycle cost
  • No maintenance
  • Used in safety critical applications

Railway compliancy

  • NF F 62-002 Rolling stock - Instantaneous relays contacts and sockets
  • NF F 70031 section 7.1.2 and 7.1.3 (for weld resistant contacts)
  • NF F16-101/102 Fire behaviour - Railway rolling stock

Vraag informatie aan

Railway rolling stock
Railway signalling