# Power Adapter MEAN WELL KNX-40E-1280D

**URL:** https://aio.lv/en/product--mean-well-knx-40e-1280d--3787979
**Data updated:** 2025-12-29 13:48 (EET)
**Category:** Other goods
**Manufacturer:** mean well
**Manufacturer code:** KNX-40E-1280D
**EAN:** 4021087052412
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 261.45 €
**Prices and availability valid until:** 2026-08-13 23:59
**Price without VAT (21%):** 216.07 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--mean-well-knx-40e-1280d--3787979

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Friday | free |
| Pickup points | 22.07.2026 | 1.89 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

The MEAN WELL KNX-40E-1280D is a reliable power adapter with an input voltage range of 180-264V and an output voltage of 30V. It is compact with dimensions of 72mm width, 57mm depth, and 90mm height. This model is RoHS certified, ensuring it meets sustainability standards. Each pack contains 48 units, making it ideal for bulk applications.

## Long description

The MEAN WELL KNX-40E-1280D is an AC-DC DIN-rail power supply designed for KNX/EIB automation systems. It delivers a stabilized 30 V DC output at up to 1.28 A and includes an integrated choke and diagnostic function. The unit accepts a wide input voltage range (180–264 V AC), has compact dimensions (72 × 57 × 90 mm), and is RoHS compliant. Packs are supplied in quantities of 48 units for professional or bulk installations.
Advantages
The KNX-40E-1280D provides a reliable 30 V DC supply with built-in choke to reduce interference and improve stability. Its diagnostic function helps monitor operational status, and the compact DIN-rail design simplifies mounting in electrical distribution cabinets. Wide input voltage range allows use in diverse mains conditions, and RoHS certification meets environmental requirements.
Suitable for
KNX/EIB building automation power supply
Control panels and DIN-rail electrical enclosures
Projects requiring compact, rack-mounted power modules
Key specifications
Output voltage: 30 V DC
Output current: 1.28 A
Input voltage range: 180–264 V AC
Form factor: DIN-rail mount
Integrated choke and diagnostic function
Dimensions (W × D × H): 72 × 57 × 90 mm
RoHS compliant
Manufacturer: MEAN WELL, model KNX-40E-1280D, EAN 4021087052412
How to use
Mount the unit on a standard DIN rail inside the electrical cabinet and connect the AC mains to the input terminals following local wiring regulations. Connect the 30 V DC output to the KNX bus power terminals or downstream devices. Use the diagnostic indicators or interface to verify proper operation and to identify faults. Ensure the unit is installed in a ventilated location and not overloaded beyond the rated 1.28 A output.
Usage recommendations
For reliable operation, confirm mains voltage compatibility (180–264 V AC), observe correct polarity on the DC output, and plan sufficient spare capacity when supplying multiple KNX devices. Replace or service the unit according to local safety standards and manufacturer instructions.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.328 kg |
| Height | 90 mm |
| Input voltage | 180 - 264 |
| Output voltage | 30 |
| Width | 72 mm |
| Depth | 57 mm |
| Quantity per pack | 48 pc(s) |
| Sustainability certificates | RoHS |

## FAQ

### How much does the Power Adapter MEAN WELL KNX-40E-1280D cost, and is it available for purchase?

The price is 261.45 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on Friday at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Power Adapter MEAN WELL KNX-40E-1280D be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All mean well products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized mean well service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Power Adapter MEAN WELL KNX-40E-1280D?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/3787979/58564083_large.webp