Mean Well LRS-350-24 DC Switching Power Supply, 24V 14.6A 350W Review (2026)
Updated September 20, 2026 · Research-based review
Our verdict
The same widely used Mean Well LRS-350-24 platform rated 350W at 24V and 14.6A, a common upgrade for DIY and converted printers. The strength is that this spec has extensive community wiring guides. The trade-off is several nearly identical listings, so price and seller matter more than specs here.
Mean Well LRS-350-24 DC switching power supply at 24V 14.6A and 350W, a common upgrade for DIY printer builds.
Price range: See on Amazon
What we liked
- + Widely used spec means plenty of wiring guides and mounts online
- + 350W headroom handles larger beds than many stock supplies
- + Reliable protection features common to the Mean Well LRS line
Trade-offs
- - Same model as several other listings, so buy on price and seller
- - Terminal screws must be torqued properly to avoid loose connections
Output and Power Budget
This supply delivers 350W at 24V, with a rated current of 14.6A on its single output. That is enough to run a heated bed, hotend, stepper motors and control board together on most single-extruder FDM printers, including machines with a larger than average bed and a longer than average print run. Because the LRS-350-24 spec is so common across the DIY 3D printing community, most printer wiring guides and enclosure designs already assume this exact output rating, making it easier to follow existing build logs step by step rather than adapting instructions that were originally written for a different wattage or output voltage supply.
Why This Exact Spec Is Popular
The Mean Well LRS-350-24 has become something of a default choice for DIY and Voron-style 3D printer builds, which means mounting brackets, wiring diagrams, and printable holders designed specifically around this unit's exact dimensions are easy to find from the community. That popularity also means several sellers list what is functionally the same power supply under slightly different photos and titles, so shoppers comparing similar 350W 24V listings should weigh price and seller reputation carefully, since the underlying electrical specification does not meaningfully differ between them once the part is confirmed to be a genuine Mean Well LRS-350-24 unit.
Build Quality and Protection
As a genuine Mean Well unit, this supply carries the protection features typical of the LRS line, including safeguards against overload and short circuits with automatic recovery once a fault is cleared, rather than needing a manual reset after every trip. It is built as an enclosed unit with a built-in cooling fan for sustained heavy loads, and terminal screws on the output side need to be torqued to the correct spec during wiring, since a loose terminal on a high current connection can create resistance, heat and, in the worst case, a fire risk over time. Mean Well's reputation in the power supply industry is generally stronger than lower cost alternatives running the same voltage and wattage numbers.
Installation Notes
Like other bare enclosed power supplies in this class, it does not include a power cord, fuse or switch, so those need to be added separately to complete a safe installation. Because 14.6A flows through the output terminals under full load, using appropriately rated wire gauge and fully tightening the terminal screws is important; a loose or undersized connection is one of the more common causes of wiring problems in DIY printer builds using this type of supply. The 24V output is compatible with the vast majority of modern printer control boards and heated beds sold for the DIY and upgrade market.
Who Should Buy It
This supply fits builders following a Voron, RepRap or other DIY printer plan that specifies a 350W 24V supply, since the wiring and mounting guidance already assumes this exact unit. It also suits anyone replacing a failed or underpowered stock supply on a converted printer that has outgrown its original electronics. Because several listings sell what amounts to the same Mean Well part, it is worth comparing price, included accessories like terminal covers or brackets, and seller return policy rather than assuming one listing is technically superior to another for the same underlying power supply hardware.
Frequently asked questions
Is this the same power supply as other 350W 24V Mean Well listings?
Yes, when it is a genuine Mean Well LRS-350-24, the electrical specification is the same across sellers; differences usually come down to price, bundled accessories and included brackets.
Does it include a power cord or switch?
No, this is a bare enclosed unit, so a power cord, fuse and typically a switch need to be added separately to complete the wiring.
Why do so many DIY printer guides specify this exact supply?
The LRS-350-24 spec is a common default in the Voron and DIY 3D printer community, so mounting brackets and wiring guides are widely available for this exact model.
What should I watch for when wiring this supply?
Torque the output terminal screws properly and use adequately rated wire, since a loose connection on a high current 24V line can create heat and a fire risk over time.
Prices change often, so check the current price and availability on Amazon.
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