TFBBU 400 relay - Flip flop, 4 contacts



The TFBBU 400 is a flip flop relay with 4 double make / double break C/O contacts (form Z). The transient pull-in mode or dropout delay is fully programmable with a dip switch and activates or desactivates the relay. The access to dip switch is available by removing time delay cover. This feature prohibits frivolous field time delay setting. Function can be also be factory set on order.
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 TFBBU 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 TFBBU 400 timing relay is designed for heavy duty applications with a flip flop latching function used for example in HVAC and lighting.


  • Delay flip flop relay
  • Transient pull-in mode or drop-out mode programmable by dip switch
  • Status LED indicator
  • Plug-in design with secure locking feature for maximum ease of maintenance
  • 4 double make / double break C/O contacts (form Z), 12 A
  • Weld no transfer contacts standard
  • Contact life (mechanical) of 100 million cycles
  • -40 °C...+85 °C operating temperature


  • Proven reliable in heavy duty application
  • Weld no transfer
  • 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



Vraag informatie aan

Railway rolling stock
Railway signalling