Mean Well LRS-350-24 (2 Pack) 24V 14.6A 350W DC Power Supply for 3D Printer, LED Strip Review (2026)

Who two units actually make sense for

Buying the LRS-350-24 as a pair makes the most sense for makers running a small print farm, a club or classroom with two machines, or a single builder who wants a spare on the shelf for when a supply eventually fails. Each unit outputs 24V at 14.6A for 350.4W, which is the standard rail voltage most Ender, Voron and other open-frame kits expect for their heated bed and hotend circuits. Buying two together typically works out cheaper per unit than ordering twice, and it means both machines are running an identical, well documented supply so troubleshooting power issues is simpler. It is not the right pick if you only own one printer with a working supply, or if you specifically need the enclosed version with a terminal cover for a build where fingers or tools could brush the AC side.

What the 24V 14.6A rating means for your build

Mean Well's own specification for the LRS-350-24 lists a panel mount enclosure around 215 by 115 by 30mm, selectable 115 or 230VAC input, and roughly 88 percent efficiency with 3kV isolation between input and output. Built in protections cover short circuit, overload, overvoltage and overtemperature, and the company rates the unit for continuous operation from minus 25 to 70 degrees Celsius, which is well beyond anything a home workshop will see. Ripple and noise sits around 150mV, low enough that stepper drivers and hotend PID loops run cleanly. The 14.6A ceiling covers a heated bed drawing 10 to 12A plus hotend and electronics with room left over, though very large beds or dual extrusion setups should check total draw before assuming spare capacity.

Wiring in and living with the supply

Installation is the same as any bare Mean Well unit, screw terminals for AC in and DC out, with a voltage trim potentiometer if the printed rail needs fine tuning. Because these are open panel mount units rather than the enclosed version, they need to sit inside a case or printer frame where the terminal block is not accessible during operation, and mains wiring should be done with the supply unplugged. Mean Well backs the LRS series with a three year warranty and the very low no load draw, under a watt, means leaving a printer's supply powered between jobs barely affects an electricity bill. Owners of the single unit version commonly note that the fan is quiet at normal loads and only becomes audible under sustained high draw.

How it compares with the enclosed version and other options

The closest alternative in this lineup is the Mean Well LRS-350-24 sold singly with a terminal cover and mounting brackets, which trades the discount of buying two for physical protection over the live terminals and easier bracket mounting inside a frame. If your printer enclosure already shields the electronics bay, the bare two pack is the better value since you are paying for two full supplies rather than one supply plus a cover. Other 350W 24V units from the same base Mean Well design, sold under different resellers or bundled for specific printers like the Sovol Ender clones, use the identical LRS-350-24 core and perform the same on paper, so the choice mostly comes down to price and whether you want the safety cover included.

Bottom line and who should look elsewhere

For anyone standardizing two printers on a reliable, well reviewed 24V supply, this two pack is a straightforward and efficient way to buy in bulk from a brand with a long track record in the 3D printing community. Skip it if you need only one supply, since the enclosed single unit with a terminal cover is safer to install inside a shared electronics bay and better suited to a first time builder who is less confident around mains wiring. Anyone assembling a printer that draws close to or above 350W total, such as a large bed heated fast, should size up rather than rely on the 14.6A ceiling with no margin.

Frequently asked questions