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EIB/KNX power supply 1280mA with integrated choke
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Mean Well
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EIB/KNX power supply 1280mA with integrated choke

EAN/GTIN: 4260643463150
Manufacturer: Mean Well
Manufacturer no.: KNX-40E-1280
Manufact.-SKU: KNX40E1280
Customs tariff no.: 85044090
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111,34 USD Price incl. VAT (0,00 USD)
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Delivery time:
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The installation of electrical devices may only be carried out by an approved electrician and, in the case of high-voltage systems (> = 400V and country-specific nominal power), only with the consent of the respective electricity network operator.



The Mean Well EIB/KNX power supply KNX-40E-1280 D is a 1280mA power supply with high efficiency and a small footprint of only 4SU (72mm). The device has a KNX bus choke output and an additional output for auxiliary power. The -30°C to 70°C wide temperature operating range can meet all kinds of applications. It is perfectly suitable to power up any products labeled with the KNX trademark. With over 30 years of industrial power supply experience, KNX-40E-1280 D is engineered to be a reliable and safe solution for the KNX bus environment.


  • EIB/KNX power supply with integrated choke
  • Compact size with 4SU width (72mm)
  • Safety extra low voltage (SELV)
  • Suitable for TP1-256
  • 180~264 VAC input
  • Protections: short circuit / overload(short-circuit-proof) / 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 of manufacturer warranty


  • Output Power: 38.4 W
  • Input Voltage: 180 VAC to 264 VAC, 176 VDC to 280 VDC
  • Output Voltage-Channel 1: 30V
  • Output Current-Channel 1: 1280mA
  • Width: 72 mm
  • Height: 90 mm
  • Series: KNX-40E
  • Maximum Operating Temperature: +70°C
  • Minimum Operating Temperature: -30°C