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Mean Well KNX-20E-640 KNX Power Supply 640mA
The KNX-20E is a Mean Well power converter (input range: 180~264VAC, operating temperature: -30~+70℃).
Key Features
- ✓ Input voltage range: 180~264VAC
- ✓ 4KVAC reinforced I/O isolation
- ✓ Wide operating temperature: -30~+70℃
- ✓ Protections: Short circuit / Overload / Over voltage
- ✓ Safety approvals: IP20 design Ⅲ; According to E 61558, EN50178,EN60664-1, EN62477-1 altitude up to 2000 N meters ; EN61558-1,EN61558-2-16 EN50491-3, ; EAC TP TC 004
- ✓ 3 years warranty
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BrandMean Well
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SeriesKNX Series
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Power Rating19.2 Watt
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Output Voltage30 Volt
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Rated Current0.64 Ampere
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Input Voltage180V~264V
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No of Output1
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Standards MetCE,EAC,KNX,TUV
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Operating Temperature-30°C~70°C
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Warranty3 Year
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Length3.54 in
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Width2.15 in
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Height2.07 in
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Weight0.47 lb
::specification::
Frequently Asked Questions
Can I use the KNX-20E-640 in a small KNX control panel for building automation?
Yes. This model is a 30V KNX power supply rated at 19.2W with a 640mA output, which fits small KNX building automation panels where a DIN rail form factor is preferred. Its 90.0 × 54.5 × 52.5 mm housing also suits compact control cabinets.
Is the KNX-20E-640 suitable for PLC and industrial automation cabinets that include KNX devices?
It is suitable where the cabinet uses a 30V KNX power supply and the required load stays within 19.2W and 640mA. The DIN rail format and 90.0 × 54.5 × 52.5 mm size make it practical for slim control cabinet layouts. It is intended as an EIB/KNX power supply with an integrated choke.
Can this power supply be used in a building management enclosure with limited space?
Yes. The KNX-20E-640 is built as a DIN rail power supply and has a relatively narrow 54.5 mm width, which helps in crowded building management enclosures. Its 30V KNX output and integrated choke are aligned with KNX control applications rather than general-purpose cabinet power.
Is the KNX-20E-640 meant for open-air use, or should it stay inside a control cabinet?
This unit is better suited to protected use inside a control cabinet or enclosure. The listed operating temperature is -30°C to +70°C, but no IP rating is provided in the product specs. For that reason, it should be matched to enclosed indoor control-panel environments rather than exposed locations.
How does the KNX-20E-640 compare with the other Mean Well KNX series power supplies?
Within this sibling group, the KNX-20E-640 and KNX-20U-640 are both 19.2W, 30V, 640mA models. The KNX-40E-1280 and KNX-40E-1280D are both 38.4W, 30V, 1280mA models. This makes the 20-series the lower-capacity option in the family, while the 40-series doubles the wattage and current at the same 30V output.
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