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Mean Well KNX-40E-1280 KNX Power Supply 1280mA 1280A
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Mean Well KNX-40E-1280 KNX Power Supply 1280mA 1280A
The KNX-40E is a Mean Well DIN rail power converter with a 72mm profile (input range: 180~264VAC, operating temperature: -40~+85°C).
Key Features
- ✓ 72mm width — DIN rail TS-35 compatible
- ✓ Input voltage range: 180~264VAC
- ✓ Cooling by free air convection
- ✓ Wide operating temperature: -40~+85°C
- ✓ Protections: Short circuit / Overload / Over voltage
- ✓ Safety approvals: EN61558-1,EN61558-2-16 ; EN50491-3
- ✓ 3 years warranty
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BrandMean Well
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SeriesKNX Series
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Power Rating38.4 Watt
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Output Voltage30 Volt
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Rated Current1.28 Ampere
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Input Voltage180V~264V
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No of Output1
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Standards MetCE,DEKRA,KNX
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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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Width2.83 in
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Height2.24 in
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Weight0.72 lb
::specification::
Frequently Asked Questions
Can I use the KNX-40E-1280 for a larger KNX building management panel?
Yes. This model provides 30V at 38.4W with a 1280mA output, making it the higher-capacity option in this KNX group for building management panels. Its DIN rail format is designed for control-panel use.
Is the KNX-40E-1280 appropriate for industrial automation cabinets with more KNX devices on the line?
It is a better fit when the KNX cabinet needs more available output than a 19.2W, 640mA unit. The KNX-40E-1280 is rated at 38.4W and 1280mA at 30V, so it is aimed at higher-load KNX automation panels. The integrated choke also aligns it with EIB/KNX system use.
Does the KNX-40E-1280 work well in a DIN rail control enclosure where panel space still matters?
Yes. It is built for DIN rail mounting and keeps a compact control-cabinet format at 90.0 × 72.0 × 57.0 mm. That size is larger than the 20-series, but it still suits structured enclosure layouts where higher 30V KNX capacity is needed.
Can the KNX-40E-1280 be used in a control cabinet with wider ambient temperature swings?
It is specified for operation from -30°C to +70°C, which supports indoor control cabinets and enclosures that see broad temperature variation. No IP rating is listed, so the product should still be treated as a cabinet or enclosure component rather than an exposed-use power supply.
What are the differences between the KNX-40E-1280 and the other KNX family models?
The KNX-40E-1280 is a 38.4W, 30V, 1280mA model. The KNX-20E-640 and KNX-20U-640 are both 19.2W, 30V, 640mA models, while the KNX-40E-1280D matches this unit at 38.4W, 30V, and 1280mA. In this family, the main split is between the 20-series capacity and the 40-series capacity.
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Other KNX-40E Models
1 other model| Model | Power | Voltage | Current | IP Rating | Price | |
|---|---|---|---|---|---|---|
| Mean Well KNX-40E-1280D KNX Power Supply 1280mA - Diagnostic 1280A | 38.4W | 30V | 1.28A | Indoor | $221.82 | View |
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