# Power Adapter MEAN WELL KNX-40E-1280

**URL:** https://aio.lv/en/product--mean-well-knx-40e-1280--3787977
**Data updated:** 2025-12-29 13:48 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** mean well
**Manufacturer code:** KNX-40E-1280
**EAN:** 4021087052429
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 161.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 133.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--mean-well-knx-40e-1280--3787977

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

The MEAN WELL KNX-40E-1280 power adapter features an input voltage range of 180-264V and an output voltage of 30V. It complies with RoHS standards and has compact dimensions of 72mm width, 57mm depth, and 90mm height. Each pack contains 48 units, making it ideal for bulk applications. This reliable power adapter is designed for efficiency and durability, ensuring stable performance in various settings.

## Long description

The MEAN WELL KNX-40E-1280 is an AC-DC DIN-rail power adapter designed for KNX/EIB building automation systems. It provides a stable 30 V DC output with integrated choke and basic functionality for powering KNX bus devices. The unit accepts a wide AC input range of 180–264 V and is RoHS compliant; its compact housing measures 72 mm (W) × 57 mm (D) × 90 mm (H). Each pack contains 48 units, suitable for larger installations or bulk procurement.
Advantages
The KNX-40E-1280 delivers a constant 30 V DC output at up to 1.28 A, includes an integrated choke for bus filtering, and mounts on standard DIN rails for easy installation. Its broad input voltage range ensures compatibility with varied mains supplies, and the compact form factor helps save panel space.
Suitable for (tasks / use cases)
 Powering KNX/EIB bus devices in residential or commercial automation
 Centralized installations in equipment cabinets and control panels
 Projects requiring multiple units purchased in bulk
Key specifications
 Output voltage: 30 V DC
 Output current: 1.28 A
 Input voltage: 180–264 V AC
 Mounting: DIN rail
 Dimensions: 72 mm × 57 mm × 90 mm (W × D × H)
 Compliance: RoHS
 Package quantity: 48 units per pack
 Brand: MEAN WELL; MPN: KNX-40E-1280; EAN: 4021087052429
How to use
Install the KNX-40E-1280 on a standard DIN rail inside the electrical cabinet. Connect the AC mains input (180–264 V) to the input terminals and the 30 V DC output to the KNX bus line or devices, observing correct polarity and local electrical codes. Ensure sufficient ventilation around the device and verify the total bus current does not exceed 1.28 A.
Usage recommendations
For reliable operation, place the power adapter in a dry, ventilated enclosure, avoid exceeding the rated output current, and follow KNX installation guidelines when connecting the bus. Use units from the same production batch for uniform performance in multi-unit installations.

## Specifications

| Feature | Value |
|---|---|
| Input voltage | 180 - 264 |
| Output voltage | 30 |

### Certificates

| Feature | Value |
|---|---|
| Compliance certificates | RoHS |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.328 kg |
| Height | 90 mm |
| Width | 72 mm |
| Depth | 57 mm |

### Logistics data

| Feature | Value |
|---|---|
| Quantity per pack | 48 pc(s) |

## FAQ

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

The price is 161.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 95 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 23.07.2026 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. All transactions are 100% secure and encrypted.

### 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

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

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

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/3787977/64228661_large.webp