At a glance
- Output Voltage
- 30 V KNX bus with choke
- Rated Output Current
- 640 mA
- Rated Output Power
- 19.2 W
- Input Voltage Range
- 180 V to 264 V AC
- Mounting
- DIN Rail
- Efficiency (typ.)
- 86% (before choke)
Model KNX-20E-640Current modelMEAN WELL KNX-20E-640 KNX Power Supply, 30 V, 640 mA, 19.2 W
Price on request
At a glance
- Output Voltage
- 30 V KNX bus with choke
- Rated Output Current
- 640 mA
- Rated Output Power
- 19.2 W
- Input Voltage Range
- 180 V to 264 V AC
- Mounting
- DIN Rail
- Efficiency (typ.)
- 86% (before choke)
Powers the KNX bus so switches, sensors and actuators can talk, for home and building automation, lighting, HVAC, blinds and alarm monitoring. KNX power supply, 30 V, 640 mA, 19.2 W. EIB / KNX power supply with integrated choke.
Include the required quantity and configuration in your quote request. Price and availability will be confirmed in the quotation.
- WarrantyManufacturer warranty under MEAN WELL's terms: 3 years. Warranty claims
- DeliveryPrice, availability and delivery charges are confirmed in your quotation. Shipping and delivery
Overview
What it is
The MEAN WELL KNX-20E-640 is a KNX power supply from the KNX-20E-640 series (640 mA KNX Power Supply), rated 30 V, 640 mA, 19.2 W.
What it is used for
Supplies the 30 V KNX bus through its integrated choke so KNX switches, sensors and actuators in a building automation or security installation can communicate, with a second 30 V output for auxiliary devices. MEAN WELL lists applications such as intelligent home control and building automation, lighting, hvac, blinds and shutters, security and alarm monitoring systems, energy management.
Key features
- EIB / KNX power supply with integrated choke.
- Compact 3SU (52.5 mm) width, mounts on DIN rail TS-35/7.5 or 15.
- Safety extra low voltage (SELV), 180 V to 264 V AC input.
- Protections: short circuit, overload (short circuit proof), over voltage.
- LED indicators for normal operation, bus reset and bus overload.
- No load power consumption below 0.5 W.
Key Specifications
- Output Voltage: 30 V KNX bus with choke (black/red terminal); 30 V auxiliary DC output without choke.
- Rated Output Current: 640 mA.
- Rated Output Power: 19.2 W.
- Input Voltage Range: 180 V to 264 V AC; 230 V to 370 V DC.
- Mounting: DIN Rail.
Buying considerations
Size the unit with headroom above the connected load and check the derating information in the datasheet for high ambient temperature or low input voltage. Other models in the same series are listed on this page.
Installation considerations
MEAN WELL treats this unit as a component of the final equipment, so approvals and EMC performance should be confirmed for the complete installation. Wiring and safety details are in the official datasheet linked below.
Features
Size and fit
- Dimensions
- 52.5 x 90 x 54.5 mm (W x H x D)
- Weight
- 0.215 kg
- Mounting
- DIN Rail
Technical specifications
Key facts
- What is it?
- KNX power supplyBrand MEAN WELL, model KNX-20E-640
- What does it output?
- 30 V KNX bus with choke, 640 mA, 19.2 W
- What input does it accept?
- 180 V to 264 V AC
- How does it mount?
- DIN Rail
- Can it be used outdoors?
- IP20
- Which documents are available?
- Datasheet, certificate Open documents
Output
- Output Voltage
- 30 V KNX bus with choke (black/red terminal); 30 V auxiliary DC output without choke
- Rated Output Current
- 640 mA
- Rated Output Power
- 19.2 W
- Ripple and Noise (max.)
- 100 mVp-p (before choke)
- Efficiency (typ.)
- 86% (before choke)
Input
- Input Voltage Range
- 180 V to 264 V AC; 230 V to 370 V DC
- Input Frequency Range
- 47 Hz to 63 Hz
Protection
- Short Circuit Current
- 1.4 A
- Withstand Voltage
- I/P to O/P: 4 kV AC; I/P to FG: 2 kV AC; O/P to FG: 0.6 kV AC
Environment
- Operating Temperature
- -30 °C to +70 °C (see derating curve)
- Operating Humidity
- 20% to 95% RH non-condensing
- Cooling
- Free air convection
- IP Rating
- IP20
Physical
- Dimensions
- 52.5 x 90 x 54.5 mm (W x H x D)
- Weight
- 0.215 kg
- Mounting
- DIN Rail
Approvals
- MTBF
- 1899.9K hrs min. Telcordia SR-332 (Bellcore); 416.5K hrs min. MIL-HDBK-217F (25 °C)
Other
- Mains Failure Back-up Time (typ.)
- 200 ms at 230 V AC, full load
- Series
- KNX-20E-640
- Warranty
- Manufacturer warranty under MEAN WELL's terms: 3 years. How claims work
Product attributes and shipping details
| Brand | MEAN WELL |
|---|---|
| Power Output | 19.2 W |
Downloads
Documentation
- KNX-20E-640 series datasheetDatasheet · Family · meanwell.comDownload
Certificate and compliance document (1)
- KNX-20E-640 CE declaration of conformityCertificate · Family · meanwell.comDownload
Series documents can differ from your exact model. Report a wrong or missing file
Questions about this product
What input voltage does the KNX-20E-640 accept?
MEAN WELL lists 180 V to 264 V AC; 230 V to 370 V DC for this model.
Ask about this modelSetup, compatibility, what is in the box
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Looking for an alternative?
We list alternatives only when we have checked they suit the same job. Compare other models in the category, or ask us to suggest one for your site.