How to Wire a MEAN WELL DIN Power Supply

Whether you're setting up a new control cabinet, optimizing a robotic assembly line, or powering any other commercial or industrial equipment, figuring out how to wire a MEAN WELL DIN power supply can feel overwhelming without the proper technical support. 

The good news? We’re here to help you feel confident in installing your new power supply with this detailed guide. Bravo Electro is your one-stop shop for MEAN WELL power supplies, and given the volume we sell, you can trust that we have the expertise to walk you through the process.

From choosing the right power supply in the first place to actually wiring the unit correctly, we’ll cover everything you need to know below to power your operation today!

For important safety information and our full disclaimer, please click here before proceeding with any of the techniques discussed in this article.

Why Power Your Operation With MEAN WELL?

With so many power supply manufacturers at your disposal, what makes MEAN WELL the #1 choice? These switching power supplies are the most trusted choice for industrial applications given the company’s track record of performance reliability since 1982.

MEAN WELL offers all the different types of power supply and even a wide range of LED drivers for sale - here are some of the most popular series you have at your disposal:



Across all these styles you can rest assured you’re getting a durable, dependable device that will power your application for years to come. These power supplies typically operate at an efficiency rate of up to 94%, minimizing both costs and heat generation

They also feature the latest and most comprehensive power supply certifications and protections along with industry-leading warranties, protecting your investment.

Choosing MEAN WELL means investing in a power supply designed to perform reliably under the most demanding conditions, backed by a robust support network from Bravo Electro. 

All that being said, you can’t go wrong choosing a DIN rail power supply - the only question is, what power supply do I need?

Choosing the Right MEAN WELL DIN Rail Power Supply

If you already have your DIN rail power supply on hand ready to be wired, you can skip ahead and learn how to wire a MEAN WELL DIN power supply below. 

But if not, it’s imperative that you take the time to do your due diligence and pick the right unit. This will save you a ton of hassle down the road navigating problems with incompatibility. 

Our advice? Reach out to us directly if you still need a PSU as we are the #1 provider of MEAN WELL devices in the industry. You can get a personalized recommendation based on your specific use case to avoid any stress or uncertainty. 

In the meantime, here’s a general overview of choosing the right device.

Voltage and Current Requirements

Begin by determining your power supply voltage requirements. MEAN WELL DIN Rail Power Supplies are available in various output voltages, typically ranging from 5V to 48V. 

Match the output voltage closely with your device’s specifications to avoid underpowering or damaging your equipment. You can learn more about what happens if the voltage is too high or what happens if your power supply is too weak in our blog, but you’re better off just avoiding this altogether. Here are the different voltages we carry:



Beyond voltage, consider other power supply specifications like current demand. Add up the current requirements of all devices that will be connected to the power supply. 

We recommend you choose a power supply equipped to handle at least 20% more current than your calculated total to ensure reliable operation under all conditions and to provide room for future expansion. Otherwise, you’ll end up having to deal with unnecessary power supply replacement should your needs scale.

Environmental Considerations

Different operating conditions will require different safeties and protections. So, take a moment to consider the environment in which your power supply will be installed and assess how harsh it is.

It’s important that the power supply’s operating temperature range meets the extremes of your environment. You should also account for humidity and dust. Power supplies with higher IP ratings can withstand moisture and particulates.

Finally, consider the installation space you have and determine whether or not you need a low profile power supply. DIN Rail power supplies are compact, but dimensions can vary. Confirm you have adequate rail space and clearance for heat dissipation.

Why Shop at Bravo Electro?

No matter what your needs are, you can rest assured Bravo Electro has the MEAN WELL DIN rail power supply you need to power your operations reliably and efficiently. 

Through our long-standing relationship with this world-renowned manufacturer, we’re able to offer the most competitive prices possible. 

More importantly, though, you’ll enjoy unparalleled customer service every step of the way - from helping you choose the right unit to walking you through the wiring process, we’re always within reach.

You also gain access to a wide variety of other power solutions, from the standard DC converter to a fully modular power supply, and even custom power supply solutions through our partnership with MEAN WELL!

So, get in touch today to ensure you’re getting the tailored solution your operation needs. At this point, though, it’s time we unpacked how to wire a MEAN WELL DIN power supply below.

How to Wire a MEAN WELL DIN Power Supply: Step-by-Step Guide

While wiring power supplies can be a stressful process for those without a background in electronics, it’s not nearly as daunting as you might think. This is especially true with our expert guidance on how to wire a MEAN WELL DIN power supply! 

From gathering your tools to actually connecting the device, testing the power source, and more - here’s a five-step guide to wiring your PSU.

Step 1) Gather the Necessary Tools and Materials

First things first, you need to make sure you have all the right tools and materials on hand for a quick and easy project that doesn’t get interrupted. You will need:

  • Screwdrivers: Phillips and flathead, depending on the type of screws on your power supply.
  • Wire Strippers: To strip the insulation from the wires for a clean connection.
  • Wire Cutters: For cutting wires to the required length.
  • Multimeter: To test voltage and continuity before and after installation.
  • Terminal Blocks: If your model uses them for connections.
  • DIN Rail (if not already installed): For mounting the power supply.
  • Appropriate Wires: Ensure they are suitable for the voltage and current specifications of your power supply and load.
  • Personal Protective Equipment: Necessary PPE includes safety glasses and gloves to protect against electrical hazards.

Step 2) Prepare the Power Supply and DIN Rail

First, you’ll need to install the DIN Rail itself if you haven’t already. If you have, you can skip down below a few paragraphs. Select the correct DIN rail type (usually TS35/7.5 or TS35/15) based on your power supply's specifications.

Then, identify a suitable location that is stable, accessible, and well-ventilated. Use a level to mark the rail's position accurately on the surface. If the rail needs to be cut to fit, use a hacksaw or DIN rail cutter for a precise cut, and file down any sharp edges.

Drill holes at the marked positions and then secure the rail with screws (and lock washers if you’re worried about vibrations). Now you can secure the MEAN WELL power supply onto the DIN rail. Make sure it snaps into place firmly and is stable. 

This is a good point to check the space around the unit and determine whether there is sufficient air circulation to prevent overheating. If not, you may need to make some adjustments to the environment or find a different location to wire the unit. 

Step 3) Connect Input Power

Now comes the fun part - actually starting to wire the MEAN WELL DIN power supply. First, locate the input terminals. These will be marked as:

  • L (Line)
  • N (Neutral)
  • ⏚ (Ground)

You can then prepare the wires by stripping the ends. Avoid removing too much insulation as this could lead to a hazardous loose connection.

From here you can insert the newly stripped ends of the wire into their corresponding terminals. Next, tighten the screws to ensure a firm and reliable connection. Always double-check that no stray strands are outside the terminals, as this could create safety concerns.

You can take a moment at this point to test the unit with a multimeter to ensure the input voltage matches the specifications of your power supply. If everything looks good, proceed to connect the output load.

Step 4) Connect Output Load

Once again, identify the output terminals for the DC outputs - these will be marked as s ‘V+’ and ‘V-’. They need to match the voltage output needs of your load, which you should have already confirmed when ordering the PSU.

Just as you did with the previous step, prepare your wires for the load and connect them to the output terminals. Like the input, ensure the connections are tight and secure.

You can now organize the wires to prevent any interference or accidental pulling, which could loosen connections over time.

Step 5) Test the Power Supply

Most of the work is done now - it’s just a matter of confirming the power supply is working as intended. Look for warning signs of short circuits between the input terminals and also between the output terminals with a multimeter.

You can now switch on the power supply, watching for indicator lights that signal it has a pulse. Determine if your connected device is working as intended. It should start up and operate smoothly without any flickering or intermittent shutdowns.

If not, there may be an issue with the wiring work you did, the power supply, or the device itself. Don’t stress - remember, one-on-one assistance awaits you at Bravo Electro!

Still Have Questions About Wiring Your Unit?

Hopefully, you have a clear grasp of how to wire a MEAN WELL DIN power supply at this point - but if all is not working as intended, don’t hesitate to get in touch with our experts here at Bravo Electro.

Otherwise, enjoy peace of mind knowing your MEAN WELL PSU is working reliably around the clock to fuel your operations and keep your costs low!

Final Thoughts on How to Wire a MEAN WELL DIN Power Supply

Successfully wiring a MEAN WELL DIN rail power supply may have had you worried when you first came here, but you should feel confident at this point. 

Preparing and mounting the DIN rail, connecting and testing the power supply, we’ve covered it all so you can guarantee a reliable electrical setup. Remember, correct installation will not only maximize the longevity of your PSU but also improve overall performance. 

Our blog has more resources on topics like how to connect a power supply to a terminal block, battery charger vs power supply, how to use DC power supply, modular power supply vs non modular, power source repair, Inventronics vs MEAN WELL, and more.

From 12 volt power supply to 24 volt power supply, 48 volt power supply, and everything in between - remember that Bravo Electro is your trusted provider of all MEAN WELL PSUs and many other leading brands, too. 

So, if you still need a device, get in touch today or browse our catalog and power your project with confidence!