# Power Supply Unit MEAN WELL MDR-20-12 20W Blue White

**URL:** https://aio.lv/en/product--mean-well-mdr-20-12--1621124
**Data updated:** 2026-01-13 17:30 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** mean well
**Manufacturer code:** MDR-20-12
**EAN:** 4021087020954
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 16.11 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--mean-well-mdr-20-12--1621124

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The MEAN WELL MDR-20-12 is a reliable 20W power supply unit with a wide AC input voltage range of 85-264V and a frequency of 47-63Hz. It features passive cooling, LED power indicators, and is UL508 and TUV EN60950-1 approved for safety. With a compact size of 22.5mm width, 100mm depth, and 90mm height, it is ideal for various applications. The unit boasts an impressive mean time between failures (MTBF) of 236900 hours, ensuring long-term reliability.

## Long description

The MEAN WELL MDR-20-12 20W Blue White is a compact DIN-rail power supply designed for control cabinets and industrial equipment that require a stable 12V DC source. It accepts a wide AC input range from 85 to 264V and operates across 47–63Hz, delivering up to 20 watts with passive cooling and an LED power indicator for visual status. The unit is certified to recognized safety standards and offers a high mean time between failures, making it suitable where continuous, low-maintenance power is needed.
Advantages
The unit’s slim 22.5 mm width saves space in crowded enclosures while the 100 mm depth and 90 mm height provide a low-profile footprint. Passive cooling eliminates moving parts and reduces maintenance and noise. The wide input voltage range allows use in diverse supply environments, and the LED indicator gives immediate feedback about power presence. Safety approvals support integration into industrial and commercial systems where certified components are required.
Suitable for
 DIN-rail mounted control cabinets and automation panels
 Industrial sensors, relays and PLC auxiliary power
 Building management and access control systems
 Small instrumentation and measurement devices requiring 12V DC
Key specifications
 Output voltage: 12 V DC
 Maximum output power: 20 W
 Input voltage range: 85–264 V AC
 Input frequency: 47–63 Hz
 Cooling method: passive (convection)
 LED status indicator: power ON
 Certifications: UL508, TUV EN60950-1
 MTBF: 236,900 hours
 Mounting: DIN-rail
 Housing color: blue/white
 Dimensions (W × D × H): 22.5 mm × 100 mm × 90 mm
How to use
Mount the power supply securely on a standard DIN-rail inside the control cabinet, ensuring adequate space around the unit for convection cooling. Connect AC input conductors to the designated terminals following local wiring regulations and verify correct grounding. Connect the 12V DC output to the load, observing polarity. Power up the AC supply and confirm the LED indicator to ensure the unit is delivering output. Perform functional checks of connected devices to verify correct operation.
Usage recommendations
Place the unit in an environment within the manufacturer’s specified temperature and humidity limits, avoid obstructing airflow around the housing, and protect the supply from excessive vibration and conductive dust. For installations with significant ripple or noise sensitivity, add appropriate filtering or transient suppression at the load side. When deploying in critical systems, consider redundancy or periodic inspection to ensure long-term reliability.

## Specifications

### Power

| Feature | Value |
|---|---|
| Total power | 20 W |
| Efficiency | 80 % |
| Hold time | 50 ms |
| Power protection features | Over voltage, Overload, Short circuit |
| Input current | 0.35 - 0.55 |
| AC input frequency | 47 - 63 |
| AC input voltage | 85 - 264 |

### Performance

| Feature | Value |
|---|---|
| Mean time between failures (MTBF) | 236900 h |

### Design

| Feature | Value |
|---|---|
| Cooling type | Passive |
| LED indicators | Power |
| Product colour | Blue, White |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 90 mm |
| Width | 22.5 mm |
| Depth | 100 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 20 - 90 |
| Storage temperature (T-T) | -40 - 85 |
| Operating temperature (T-T) | -20 - 70 |
| Storage relative humidity (H-H) | 10 - 95 |

### Packaging data

| Feature | Value |
|---|---|
| Package weight | 190 g |

### Other features

| Feature | Value |
|---|---|
| Rise time | 30 ms |

### Safety regulation & standards

| Feature | Value |
|---|---|
| Safety | UL508, TUV EN60950-1 approved |

## FAQ

### How much does the Power Supply Unit MEAN WELL MDR-20-12 cost, and is it available for purchase?

The price is 19.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 209 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 14.07.2026 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, Bank cards on-line, Apple Pay, Google Pay. 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: total power, efficiency, product colour, 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.

## Image

https://aio.lv/img/cache/product/1621124/64167350_large.webp