Timer relais

TTBCA 400 relay - Delay-on pull-in, instantaneous



This time delay relay has 4 changeover simple break contacts with 2 instantaneous contacts and 2 delayed contacts on pull-in fully programmable (with dipswitch) from 0.5 seconds to 4 seconds. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting.
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.
The TTBCA 400 relay is pluggable in the following sockets: EA 102 B, EA 102 BF, EA 103 BF, EA 104 B, EA 104 BF, EA 105 BF, EA 112 BF.


The TTBCA 400 timing relay is designed for applications with a programmable timing function used for example in HVAC and lighting.


  • Delay-on pull-in and instataneous functions
  • Delay range from 0.5 s up to 4 s (other on request up to 60 s)
  • Time delay fully programmable by dip switch
  • Status LED indicator
  • Plug-in design with secure locking feature for maximum ease of maintenance
  • 4 simple break CO contacts (form Z),
  • 6 A with 2 instantaneous C/O and
  • 2 C/O delayed contacts on pull-in
  • Weld no transfer contacts
  • Contact life (mechanical) of 10 million cycles


  • Proven reliable
  • Long life cycle
  • Accurate timing selection finger safe
  • 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 F 16-101/102 Fire behaviour - Railway rolling stock
  • EN 50155 Railway application - electronic equipment used on rolling stock
  • IEC 61373 Railway application - shock and vibration tests



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Railway rolling stock
Railway signalling