501 EFD - Control Unit

Type: 501 EFD

Code: 0.501.045

Voltage: 230V~ 50/60Hz

Waiting time (Tw): 5 s

Safety time (Ts): 10 s

Brand: SIT Group, Italy

Condition: Like new (stock picture available on request)

Stock: Subject to availability

Price: Available on request

501 EFD

The 501 EFD automatic direct burner ignition (DBI) unit has been designed for atmospheric and fan assisted burners which require non volatile lock-out. This SIT Flame Failure Device is a solid state controller based on the well known and proven rectification effect of flame ionization. A suitable design and a special components selection has allowed SIT to obtain a wide temperature range from -20 to +80 °C.


The 501 EFD provides automatic ignition control with non volatile lock-out for intermittent operation in accordance with EN 298 for:

  • Atmospheric burners
  • Fan-assisted boilers, including dynamic air check.

  • Basic features include:
  • Compact design
  • Remote, manual reset function
  • Multiple plug-in connectors
  • Well established electronic technology for high reliability
  • Atmospheric burner applications
  • Trial for ignition after flame loss
  • Permanent lock-out visualization, also without thermostat input
  • Wide range of operating ambient temperature

  • Type: 501 EFD

    Code: 0.501.045

    Voltage: 230V~

    Frequency: 50/60Hz

    Waiting time (Tw): 5 s

    Safety time (Ts): 10 s

    Ambient temperature: -20...+80 °C

    For more information on technical data, please see data sheet.

    If you have any questions about this product please email us at saadwaheed09@gmail.com