Mean Well LRS-350-24 24V 350W 14.6A Enclosed Switching Power Supply w/ Terminal Cover, Brackets Review (2026)

Who benefits from the added terminal cover

This listing targets builders assembling or upgrading a single 3D printer, LED lighting install or general 24V project where the power supply will sit somewhere a hand or tool could brush against it, such as inside an open frame Ender style printer or a DIY control cabinet. The terminal cover is the main reason to choose this over the bare two pack version, since it shields the AC input and DC output screws once wiring is complete. Anyone who has previously worked with unprotected panel mount supplies will recognize the value of not having live terminals sitting exposed a few centimeters from moving belts and hot surfaces. It is less necessary if the supply will live inside a sealed electronics bay that already keeps hands away from the terminals.

Specs behind the 350W 24V rating

Like the rest of the LRS-350-24 family, this unit is built around Mean Well's switching design rated for 350.4W continuous output at 24V and 14.6A, with 115 or 230VAC selectable input. The manufacturer's own documentation lists roughly 88 percent efficiency, 3kV input to output isolation, and protection circuits for short circuit, overload, overvoltage and overtemperature conditions. The enclosed variant adds mounting brackets that let the unit bolt directly to a printer frame or enclosure wall, which saves improvising a mount with zip ties or double sided tape. Ripple and noise performance and the minus 25 to 70 degree operating range are unchanged from the bare version, since the electronics inside are the same core module.

Fitting it into a printer build

Mounting brackets are a welcome addition, but they follow Mean Well's own hole spacing rather than any specific printer's frame, so it is worth measuring before assuming a drop in fit on machines like a Voron or a custom CoreXY build. Wiring still requires the builder to connect mains input and run 24V output to the mainboard and heated bed themselves, with correct polarity and gauge wire, and grounding the case per local electrical code remains the user's responsibility even with the cover in place. Once installed, the enclosed unit runs the same low no load draw as the bare version and stays quiet at typical desktop printer loads, based on feedback from owners of the identical LRS-350-24 core module.

How it stacks up against the bare two pack and rivals

Compared with the bare two pack version of this same supply, buying one enclosed unit costs more per watt but adds real protection and easier mounting, which matters most for a first printer build or a shared workshop where other people might reach into the case. Against other 350W 24V options bundled for specific machines, such as versions marketed for Sovol or Ender upgrades, the underlying Mean Well LRS-350-24 module is functionally the same, so the deciding factors are the cover, brackets and price rather than raw output specs, which are essentially identical across these listings.

Bottom line and who should choose differently

For a single printer or lighting project where safety around exposed terminals is a real concern, this enclosed LRS-350-24 is worth the extra cost over the bare panel version. Choose the two pack instead if you are equipping two machines and your enclosure already isolates the electronics bay, since paying for a second cover and bracket set you do not need is wasted money. Builders who need more than 350W of headroom, for a large heated bed or multiple high wattage accessories, should look at a higher rated Mean Well model instead of assuming this unit has spare capacity.

Frequently asked questions