{"product_id":"lrs-35-5-35w-single-output-switching-power-supply","title":"Mean Well LRS-35-5","description":"\u003ch2\u003eMean Well LRS-35-5 — 35W 5V\/7A enclosed switcher\u003c\/h2\u003e\n\u003cp\u003eA compact, fanless 5V supply for the low-voltage side of a printer build. The LRS-35-5 delivers a regulated 5V DC at up to 7A (35W) — enough headroom for a Raspberry Pi running Klipper\/Mainsail plus a few accessories, an MCU board, RGB\/Neopixel strips, small fans, or a panel display. It is not a bed-heater supply; for the 24V printer side (heated bed, hotend, steppers, fans on a Voron or RatRig), use a 24V unit like the LRS-350-24. This is the small companion rail.\u003c\/p\u003e\n\n\u003ch3\u003eWhat it powers\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRaspberry Pi \/ SBC\u003c\/strong\u003e — clean isolated 5V instead of a wall-wart, so the Pi shares the printer's single mains inlet and switch. At 7A there's margin for a Pi 4\/5 plus a camera and a USB device or two.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5V MCU and accessory rail\u003c\/strong\u003e — logic boards, screens, LED lighting, chamber\/electronics-bay fans, anything spec'd for 5V.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBench \/ electronics use\u003c\/strong\u003e — adjustable 4.5–5.5V trimmer lets you trim to exactly 5.0V at the load, or nudge slightly to compensate for wire drop.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe form factor — and the honest wiring story\u003c\/h3\u003e\n\u003cp\u003eLRS is Mean Well's compact enclosed switcher: a vented sheet-metal box, no fan, low 30mm profile so it tucks into a printer's electronics bay. Cooling is passive free-air convection, so leave airflow around it and don't bury it under cabling.\u003c\/p\u003e\n\u003cp\u003eConnections are a \u003cstrong\u003ebare screw-terminal block\u003c\/strong\u003e: live, neutral, earth on the input side, +V and −V on the output. There is no IEC inlet, no fuse, and no shroud — that is the installer's job. This unit carries \u003cstrong\u003elive mains on exposed terminals\u003c\/strong\u003e. To wire it safely you must:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAdd an \u003cstrong\u003einline fuse\u003c\/strong\u003e on the live input sized for the supply (the LRS-35 datasheet specifies the fuse rating).\u003c\/li\u003e\n  \u003cli\u003eBond the case to \u003cstrong\u003eprotective earth\u003c\/strong\u003e — the earth terminal is not optional on a metal-enclosure mains supply.\u003c\/li\u003e\n  \u003cli\u003eMount it so the terminals are \u003cstrong\u003enot finger-accessible\u003c\/strong\u003e — inside an enclosure or behind a terminal cover.\u003c\/li\u003e\n  \u003cli\u003eUse correctly gauged wire and proper ferrules\/strain relief.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIf you're not comfortable terminating mains, have someone who is do this part. Done right it's a clean, single-inlet install; done carelessly it's a shock and fire hazard.\u003c\/p\u003e\n\n\u003ch3\u003eSpec at a glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eOutput: 5V DC, 7A, 35W — adjustable 4.5–5.5V\u003c\/li\u003e\n  \u003cli\u003eInput: 85–264VAC, 47–63Hz (full 35W across the whole range) \/ 120–373VDC\u003c\/li\u003e\n  \u003cli\u003eEfficiency ~82%, \u0026lt;0.2W no-load draw\u003c\/li\u003e\n  \u003cli\u003eProtections: over-load, over-voltage, short-circuit\u003c\/li\u003e\n  \u003cli\u003eIsolation 3000VAC input-to-output\u003c\/li\u003e\n  \u003cli\u003eFanless convection, −30 to +70°C\u003c\/li\u003e\n  \u003cli\u003e99 × 82 × 30mm, ~210g — screw-terminal block\u003c\/li\u003e\n  \u003cli\u003eMean Well 3-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eGenuine Mean Well. On clearance at the price shown.\u003c\/p\u003e","brand":"MEAN WELL USA Inc.","offers":[{"title":"Default Title","offer_id":43607812210910,"sku":"3505567816","price":11.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0556\/9767\/0313\/products\/nhgkh.jpg?v=1667274947","url":"https:\/\/formosissima.myshopify.com\/products\/lrs-35-5-35w-single-output-switching-power-supply","provider":"dfh.fm","version":"1.0","type":"link"}