# Power supply unit Black Box MDR-40-12, 40 W, 12 V output, 85–264 VAC input, 47–63 Hz, blue/white

**URL:** https://aio.lv/en/product--black-box-mdr-40-12--11679571
**Data updated:** 2026-01-23 13:50 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** black box
**Manufacturer code:** MDR-40-12
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 202.49 €
**Prices and availability valid until:** 2026-07-16 23:59
**Price without VAT (21%):** 167.35 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--black-box-mdr-40-12--11679571

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.06.2026 | free |
| Pickup points | 30.06.2026 | 1.99 EUR |
| Courier delivery to door | 30.06.2026 | 4.99 EUR |

## Summary description

Black Box MDR-40-12 is a compact 40 W switching power supply providing a 12 V output for industrial and electronics applications. It accepts universal AC input 85–264 VAC at 47–63 Hz, with 1% voltage tolerance and 500 ms rise time. Certified to cUL and CE standards, the unit measures 40 × 100 × 90 mm and comes in blue and white housing for DIN-rail or panel installations.

## Long description

Black Box MDR-40-12 is a compact 40 W switching power supply that provides a regulated 12 V DC output for industrial and electronics applications. It accepts a universal AC input of 85–264 VAC at 47–63 Hz with 1% voltage tolerance and features a short rise time. The unit is housed in a blue and white enclosure sized for DIN-rail or panel installation and is certified to cUL and CE standards.
Advantages
The MDR-40-12 combines a narrow DIN-rail design with protection features including short-circuit, overload and over-voltage protection, and finger-safe terminals for safer handling. Its wide input range and extended operating temperature capability make it suitable for varied industrial environments, while an LED indicates DC output status to simplify monitoring.
Suitable for
Powering industrial control equipment and automation modules
Supplying Heavy Duty Edge Switches and Media Converter Switches
DIN-rail or panel-mounted electronic installations with limited space
Key specifications
Output power: 40 W
Output voltage: 12 V DC (regulated)
Input voltage: 85–264 VAC, 47–63 Hz
Voltage tolerance: ±1%
Rise time: approximately 500 ms
Operating temperature range: -20 to +70° C (extended)
Dimensions: 40 × 100 × 90 mm
LED indicator for DC power
Finger-safe terminal connections
Protections: short circuit, overload, over-voltage
Approvals: cUL, CE
How to use
Mount the power supply on a DIN rail or panel according to installation space and secure the enclosure. Connect the AC input within the specified 85–264 VAC range and observe correct polarity on the 12 V DC output connections. Verify the LED indicator to ensure DC output presence. Follow standard wiring and grounding practices and allow adequate ventilation around the unit during operation.
Usage recommendations
Use the MDR-40-12 in environments within the stated temperature range and ensure the connected load does not exceed 40 W. Although the device can accept DC input in a wider range, only use DC voltages if suitable and certified for your application. Regularly inspect terminal connections and keep ventilation clear to maintain reliable operation.

## Specifications

### Power

| Feature | Value |
|---|---|
| Total power | 40 W |
| Efficiency | 86 % |
| Hold time | 50 ms |
| Input current | 1.1 |
| AC input frequency | 47 - 63 |
| AC input voltage | 85 - 264 |
| Maximum input current (@110V) | 1.1 A |
| Maximum input current (@220V) | 0.7 A |

### Design

| Feature | Value |
|---|---|
| LED indicators | Y |
| Product colour | Blue, White |

### Certificates

| Feature | Value |
|---|---|
| Certification | cUL, CE |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.3 kg |
| Height | 90 mm |
| Width | 40 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 |
| Operating temperature (T-T) | -4 - 158 |

### Other features

| Feature | Value |
|---|---|
| Rise time | 500 ms |
| Voltage tolerance | 1 % |

## FAQ

### How much does the Power supply Black Box MDR-40-12 40 W cost, and is it available for purchase?

The price is 202.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 4 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 25.06.2026 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 black box 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 black box 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, weight, 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/11679571/67014123_large.webp