Direct schakelende relais

303 relay - Safety critical, 19 contacts



The 303 relay has 19 double break contacts in all N/O and N/C combinations.
The plug-in design offers secure locking feature for maximum ease of maintenance (no wires need to be disconnected or other hardware removed for relay inspection or replacement). 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. Weld no transfer safety contacts are standard. If one N/O contact welds, no N/C contact can close and visa versa. All relays are factory tested to insure they meet this important safety requirement.
The 303 relay can be plugged in the COR NK or COR PA socket.


The 303 relay is designed for general purpose such as lighting, pumps and fans, offering as standard a weld no transfer design for safety critical applications such as door control, emergency brake failure, interlocking traction and breaking. Optional gold contact are possible for dry circuit applications or silver and gold contacts combined for mixed load applications.


  • Instantaneous relay
  • Plug-in design with secure locking feature for maximum ease of maintenance
  • 19 double break contacts in all N/O and N/C combinations
  • Weld no transfer safety contacts standard
  • Optional gold contacts • Optional gold bifurcated and silver contacts
  • Contact life (mechanical) of 100 million cycles
  • -40 °C...+80 °C operating temperature


  • Proven reliable
  • Long life cycle
  • Easy to maintain and replace
  • Low life cycle cost
  • No maintenance

Railway compliancy

  • NF F 62-002 Rolling stock - Instantaneous relays contacts and sockets
  • NF F16-101/102 Fire behaviour - Railway rolling stock
  • Relay has been approved to go on the English/French train channel shuttle

Vraag informatie aan

Railway rolling stock
Railway signalling