MDR-40-5 | Mean Well AC/DC DIN Rail Power Supply
Need More Details?
If you’d like to check stock availability, request the latest price, or view more product images, simply click the "Request for Price" button and our team will assist you promptly.

MDR-40-5 | Mean Well AC/DC DIN Rail Power Supply
The Mean Well AC/DC DIN Rail Power Supply (Model MDR-40-5) is a reliable and compact power supply unit designed for industrial automation, control panels, and machinery applications. This DIN rail-mounted power supply converts AC input voltage into a stable 5V DC output, providing dependable power to PLCs, sensors, relays, and other automation components. Engineered with Mean Well’s trusted technology, the MDR-40-5 ensures consistent performance, high efficiency, and long-term durability in demanding industrial environments.
Key Features
-
Provides stable 5V DC output for industrial automation and control systems
-
Compact, DIN rail-mountable design for easy installation in control panels
-
High efficiency and low power loss for reliable operation
-
Short-circuit, overload, and overvoltage protection for enhanced safety
-
Robust construction suitable for harsh industrial environments
Specifications
-
Model: MDR-40-5
-
Type: AC/DC DIN Rail Power Supply
-
Input Voltage: 85–264V AC / 120–370V DC
-
Output Voltage: 5V DC
-
Output Current: 8A
-
Power Rating: 40W
-
Efficiency: Up to 88%
-
Protection: Short-circuit, overload, overvoltage
-
Mounting: DIN rail (TS-35/7.5 or TS-35/15)
-
Manufacturer: Mean Well
-
Availability: On Request
The MDR-40-5 Mean Well AC/DC DIN Rail Power Supply delivers reliable, efficient, and long-lasting power for critical industrial and automation applications. Trusted for Mean Well’s quality and engineering excellence, it is an ideal solution for system integrators and automation professionals. For procurement, technical support, or system integration, Ram Automations is available at info@ramautomations.com.
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.