Mean Well LRS-350-24 AC/DC Switching Power Supply 350.4W 24V 14.6A Single Output Review (2026)

Output and Power Budget

The LRS-350-24 is rated for 350.4W of continuous output at 24V, delivering up to 14.6A on a single output rail. For a 3D printer, that budget needs to cover the heated bed, hotend heater, stepper motors, control board and any accessories like a display or lighting running from the same supply, and 350W is enough headroom for most single-hotend FDM machines including builds with a reasonably large heated bed. Builders adding a second hotend, a large enclosure heater or multiple accessory rails should add up their expected draw against the 14.6A limit before assuming this single supply covers everything.

Input and Compatibility

The supply accepts a wide input voltage range covering both 115V and 230V mains power, so it works across regions with different standard wall voltages without needing a separate model. The 24V output matches the electronics used in most modern Creality-style and DIY printer builds, including common control boards like the BIGTREETECH SKR series, so it slots into typical printer wiring without a voltage mismatch. Because this is the genuine Mean Well LRS series, wiring diagrams, mounting brackets and terminal cover accessories designed for this exact model are widely available from third parties and community guides.

Build Quality and Protection

Mean Well's LRS series is a long established line in the power supply market, and the LRS-350-24 carries the protections typical of that line, including safeguards against overload, overvoltage and short circuits with a hiccup mode that automatically attempts recovery once a fault clears rather than requiring a manual reset. The unit is rated for use across a wide operating temperature range, with a built-in cooling fan to manage heat during sustained heavy loads, such as a printer running for many hours with the bed and hotend both drawing significant current. No-load power draw is very low, so the supply does not waste meaningful power when the printer is idle but still connected.

What Buyers Need to Add

This is a bare enclosed supply, not a complete kit, so builders should plan to source an appropriate AC power cord, an inline fuse sized to the circuit, and typically a power switch, since the unit itself does not include a switch on the housing. A mounting bracket may also be needed depending on the printer frame or enclosure being built, though many DIY printer cases are designed around this exact form factor since it is such a common choice among hobbyists. The built-in cooling fan runs continuously under load and can be audible in a quiet room, which is worth noting for anyone printing overnight in a bedroom or other shared living space.

Who Should Buy It

This supply suits anyone building a DIY printer from scratch, replacing a failed stock power supply, or upgrading from a smaller wattage unit that is running near its limit with a larger bed or added accessories. Genuine Mean Well units carry a reputation for reliability that budget clone power supplies do not always match, which matters for a component running unattended for hours at a time next to heating elements. Buyers who want a plug-and-play experience with cord and switch already attached should look at enclosed kits built around this supply rather than the bare unit itself.

Frequently asked questions