When you're wiring up a control cabinet or industrial machine, the power supply is the component you want to get right the first time. The Mean Well SDR-480-24 brings 480W of continuous output at 24V DC in a DIN-rail form factor, and at USD 85.00, it's positioned as a serious workhorse. But does it fit your specific setup? Let's look at what the listed details actually tell you.
Quick verdict
If your project needs a compact 24V supply that mounts directly onto a DIN rail and delivers 20A, the Mean Well SDR-480-24 is a credible choice. Its 480W rating and low ripple and noise of 5mV point to clean, stable power for PLCs, sensors, and other sensitive loads. The catch: the unit is listed as new open-box with no original box, so you're getting the hardware without retail packaging.
Who it suits
This supply suits industrial control panels, automation equipment, and commercial installations where 24V DC is the working voltage. The DIN Rail Mount design is a natural fit for crowded enclosures where you want to clip the unit onto a standard rail rather than bolt it to a flat surface. The Type A plug is a common option for many setups. With an inrush current rating of 20A, it's also worth pairing with proper branch protection.
What stands out from the listed details
Ripple and noise at only 5mV is a standout if your loads are sensitive to voltage fluctuations. The backup time of 1.5 minutes gives you a brief window for controlled shutdown if the AC input drops, though this isn't a substitute for a dedicated UPS. The unit can be installed indoors or outdoors per the description, and the enclosed construction type adds a layer of physical protection. At USD 85.00, you're paying for a well-known model name backed by the SDR series design.
Meaningful trade-offs
The biggest trade-off is condition: this is a new open-box item without its original box, described as new old inventory. If you need factory-sealed packaging for compliance or resale, this may not be the listing for you. Another trade-off is the 35°C maximum operating temperature listed in the attributes. In a hot, poorly ventilated enclosure, you'll need to account for heat or derating, even though the output capacity is a generous 480W. There's also no mention of a warranty, so you're relying on the seller's stated condition.
Bottom line
For a 24V DC system that needs 20A and 480W in a DIN-rail package, the Mean Well SDR-480-24 at USD 85.00 is a solid pick if open-box condition and the absence of the original box don't bother you. The low ripple and noise and the clear power specs make it a practical foundation for your control cabinet. Just make sure your enclosure stays within the listed operating temperature range.
Mean Well SDR-480-24 24V 20A 480W AC to DC DIN-Rail Power Supply
This is the unit at the heart of the listing: a 24V, 20A, 480W AC-to-DC DIN-rail power supply. The 5mV ripple and noise figure is worth paying attention to if you're feeding sensitive controllers. The listed backup time of 1.5 minutes is a small cushion, but the open-box condition and no original box are details to factor into your buying decision.
