KNX power supply with integrated choke, offering 180~264VAC input and a wide operating temperature range.

  • EIB/KNX power supply with integrated choke
  • Compact size
  • Safety extra low voltage (SELV)
  • 180~264VAC input
  • No load power consumption <0.5W
  • Protections: short circuit/overload/over voltage
  • Cooling by free air convection
  • Isolation class I
  • LED indicator for normal operation, bus reset and bus overload
  • Installed on DIN rail TS-35/7.5 or 15
  • Over voltage category III
  • 100% full load burn-in test
  • 3 years warranty
With over 30 years of industrial power supply experience, KNX-20E-640 is engineered to be a reliable and safe solution for the KNX bus environment.

The KNX power supply KNX-20E-640 is a 640mA power supply with high efficiency and a small footprint of 3SU.

The device has a KNX bus choke output and an additional output for ancillary power.

The wide -30~+70°c operating temperature range can meet all kinds of applications from intelligent home control to alarm monitoring.

LED indicators are used in case of normal operation, overload conditions and reset operation.

The KNX-20E-640 is perfectly suitable to power up any products labelled with the KNX trademark.


For more information and to discuss your requirements, please contact us.


Additional information

Inputs 180~264Vac


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  • Intelligent home control
  • Modern building automation
  • Lighting control
  • HVAC system
  • Security system
  • Blinds and shutters
  • Monitoring systems
  • Energy management
  • Alarm monitoring