{"product_id":"mean-well-lrs-150-48","title":"Mean Well LRS-150-48","description":"\u003ch2\u003eMean Well LRS-150-48 — 150W 48V 3.3A enclosed switching PSU\u003c\/h2\u003e\n\u003cp\u003eA fanless, low-profile (1U \/ 30mm) enclosed switching supply from Mean Well's LRS line. 48V DC out, 3.3A, 158.4W maximum. This is the silent, compact brick you bolt into a printer base or control cabinet and forget about.\u003c\/p\u003e\n\n\u003ch3\u003eRead this first: the 48V variant is not the standard printer part\u003c\/h3\u003e\n\u003cp\u003eMost 3D printers — Voron, RatRig, the common Klipper\/Ender builds — run their bed heater, mainboard, and electronics on \u003cstrong\u003e24V\u003c\/strong\u003e. That is the Voron standard. This is the \u003cstrong\u003e48V\u003c\/strong\u003e unit, which is a different animal:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIt is for high-voltage stepper drivers and industrial loads\u003c\/strong\u003e, not a 24V bed heater. Some builders run steppers at 48V for higher top speed and acceleration headroom (driver permitting — check your driver's max input, e.g. TMC5160-class), and 48V is common in CNC and industrial gear.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDo not wire a 24V bed heater, 24V hotend, 24V fans, or a 24V mainboard to this.\u003c\/strong\u003e Feeding 48V into 24V-rated hardware will destroy it. If you came here for a standard Voron\/Klipper bed + electronics supply, you want the \u003cstrong\u003eLRS-150-24\u003c\/strong\u003e (or a larger 24V unit sized to your bed), not this part.\u003c\/li\u003e\n  \u003cli\u003eFor powering a Raspberry Pi \/ SBC \/ MCU, you want a \u003cstrong\u003e5V\u003c\/strong\u003e supply (or a buck converter), not this.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBought with eyes open, the LRS-150-48 is a clean, proven 48V rail. Bought by mistake, it's a fast way to let the magic smoke out of your electronics. We'd rather you know.\u003c\/p\u003e\n\n\u003ch3\u003eThe wiring and safety reality (bare mains terminals)\u003c\/h3\u003e\n\u003cp\u003eThis is an open-frame-style enclosed supply with a \u003cstrong\u003escrew-terminal block\u003c\/strong\u003e, not a sealed wall-wart. Live AC mains lands on exposed screw terminals (Line \/ Neutral \/ Earth) right next to the DC output terminals (+V \/ -V). That means:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eYou are responsible for the mains side.\u003c\/strong\u003e You provide the AC cabling, strain relief, an inline fuse on the Line conductor, and a proper earth (ground) connection to the chassis. None of that is included.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThe terminals are touch-live when powered.\u003c\/strong\u003e Mount it inside an enclosure or behind a guard so nobody can contact the AC terminals. Set the \u003cstrong\u003e115\/230V input switch correctly for your mains before first power-on\u003c\/strong\u003e — wrong position on 230V mains can damage the unit.\u003c\/li\u003e\n  \u003cli\u003eIf you're not comfortable terminating mains AC, fusing it, and earthing the chassis, this is not the right product for you — buy a sealed external brick instead. There's no shame in it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy this form factor\u003c\/h3\u003e\n\u003cp\u003eThe LRS series is the go-to for printer and cabinet builds because it's \u003cstrong\u003efanless\u003c\/strong\u003e (convection cooled — no fan to fail, no fan noise) and \u003cstrong\u003ethin\u003c\/strong\u003e (30mm tall), so it tucks into a printer base or DIN-adjacent control area without a tower-sized footprint. ~90% efficient, wide 85-264VAC input, and the usual Mean Well protection set: over-voltage, overload, over-temperature, and short-circuit. UL\/TUV\/CB\/CE listed, 3-year warranty from Mean Well.\u003c\/p\u003e\n\n\u003ch3\u003eHonest spec notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull output across the input range:\u003c\/strong\u003e the full 3.3A \/ 158.4W is available over the entire 85-264VAC input, on both the 115V and 230V switch settings. (On 115V mains the AC input current is roughly double that on 230V — normal P=VI behavior — but the DC output is not derated.)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThermal derating:\u003c\/strong\u003e rated to +70C ambient, but you lose available current above roughly +50C. Convection cooling means airflow and orientation matter inside a hot enclosure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle output:\u003c\/strong\u003e one 48V rail, adjustable a few percent (43.2-52.8V) via the onboard trim pot.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eOn clearance — solid Mean Well silicon at a clearance price. Just make sure 48V is actually the rail your build needs before you buy.\u003c\/p\u003e","brand":"MEAN WELL USA Inc.","offers":[{"title":"Default Title","offer_id":44779830247646,"sku":"5447237924","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/9767\/0313\/files\/l_rs-150-48.jpg?v=1707758103","url":"https:\/\/formosissima.myshopify.com\/products\/mean-well-lrs-150-48","provider":"dfh.fm","version":"1.0","type":"link"}