Mean Well LRS-350-12 348W 12V 29A Switching Power Supply

Description Device Overview: Mean Well LRS-350-12 The Mean Well LRS-350-12 delivers a steady 12V at up to 29A, giving you 348W of regulated DC power in a low profile enclosed chassis. It sits right below the larger Mean Well LRS-600-12, making it the ideal 12V supply when 600W is overkill but you still need serious current headroom for Bitcoin home mining setups. According to the Mean Well LRS-350 series datasheet, the 12V model achieves up to 89% typical efficiency, which means less waste heat and quieter operation than most generic 12V supplies. Why Choose the LRS-350-12 for Bitcoin Home Mining? The Bitaxe GT 801 and NerdQaxe Rev 6.1 both run on 12V rails. At default firmware settings, a NerdQaxe draws approximately 80W. The LRS-350-12 provides enough capacity to run three NerdQaxe units at stock (240W total) or two overclocked units at up to 110W each (220W total), both well within the 278W continuous safe target under the 80% rule. Applying the 80% rule to the LRS-350-12: 348W x 0.80 = 278W continuous safe target, which is 23.2A at 12V. For builds that exceed 278W continuous, such as three or more overclocked NerdQaxe units, step up to the LRS-600-12 (600W). For a deeper dive on wiring, safety, and the 80% rule, read our Beginner’s Guide to Mean Well Power Supplies for Bitcoin Home Mining and The 80% Rule: Safer Power for Bitcoin Home Mining. What Makes the Mean Well LRS-350-12 Stand Out? Single 12V output rated 29A continuous for 348W total, with 150% peak load capability for up to 1 second per the manufacturer datasheet. AC input selectable by rear switch for 115 VAC (90-132 VAC) or 230 VAC (180-264 VAC) so you can match your mains before first power up. Trim the output voltage from approximately 10.2V to 13.8V using the onboard potentiometer to compensate for cable voltage drop or to fine-tune for specific device requirements. Built in protections for short circuit, overload, over voltage, and over temperature with automatic recovery (hiccup mode). Temperature controlled DC fan with on/off logic (approximately 50°C fan on, 40°C fan off) for efficient and quiet operation at light loads. Up to 89% typical efficiency reduces waste heat compared to lower efficiency alternatives. No-load power consumption under 0.75W to help systems meet energy requirements when miners are powered down. 5G anti-vibration rated for reliable operation in environments with mechanical vibration. All specifications per the official Mean Well LRS-350 series datasheet. Terminal Wiring Limit: Maximum 2 Wires Per Screw The LRS-350-12 has three V output terminals (pins 7, 8, 9) and three -V output terminals (pins 4, 5, 6) on its DC screw terminal block. For safe and reliable connections, never terminate more than two wires on a single screw terminal. Exceeding two wires per terminal increases the risk of loose connections, overheating, and potential fire hazard. This means the LRS-350-12 can physically support a maximum of six individual DC output wire pairs (one positive and one negative per miner), assuming two wires per V screw and two wires per -V screw. However, the 80% power rule will often be the limiting factor before you reach the six-miner wiring maximum. Always calculate total wattage first, then confirm you have sufficient terminal capacity for your wire count. Use properly crimped fork or ring terminals sized for the screw and wire gauge. Do not use bare stripped wire in terminal blocks carrying high current. Tighten each screw firmly and verify there is no exposed conductor outside the terminal clamp. Which Solo Satoshi Miners Does the LRS-350-12 Power? Any 12V miner in the Solo Satoshi lineup is compatible with the LRS-350-12. Two constraints determine how many miners you can connect: the 80% continuous power rule (278W safe target) and the physical terminal wiring limit (6 miners max at 2 wires per screw). Whichever limit is reached first is the binding constraint for your build. Miner Voltage Stock Draw Overclocked Draw Max Units at Stock (278W Limit) Max Units Overclocked (278W Limit) Wiring Limit (6 Max) Bitaxe GT 801 12V ~50W Up to ~75W 5 units (250W) 3 units (225W) 6 max NerdQaxe Rev 6.1 12V ~80W Up to ~110W 3 units (240W) 2 units (220W) 6 max NerdQaxe Hydro 12V ~80W Up to ~110W 3 units (240W) 2 units (220W) 6 max NerdQaxe 12V ~40W Up to ~60W 6 units (240W) 4 units (240W) 6 max Power draws listed above are approximate. Stock values reflect default firmware settings. Overclocked values reflect aggressive tuning and will vary by chip quality, cooling, and firmware version. Always verify your device’s actual consumption with a watt meter before sizing a power supply. For builds that exceed 278W continuous or require more than six wire pairs, step up to the Mean Well LRS-600-12. Important: 5V miners like the Bitaxe Gamma 602, Bitaxe Duo 650, and Nerdaxe Gamma require a 5V supply. Connecting a 5V device to a 12V supply will permanently damage the device. For 5V miners, see the Mean Well LRS-350-5 or Bitaxe 30W 5V 6A Power Supply. How Does the LRS-350-12 Compare to Other Mean Well Models? Specification LRS-50-5 LRS-350-5 LRS-350-12 LRS-600-12 Output Voltage 5V 5V 12V 12V Max Current 10A 60A 29A 50A Max Wattage 50W 300W 348W 600W 80% Safe Target 40W 240W 278W 480W Efficiency 84% 83.5% 89% 90% Cooling Fanless (convection) Fan (temp controlled) Fan (temp controlled) Fan (temp controlled) Dimensions (mm) 129 x 97 x 30 215 x 115 x 30 215 x 115 x 30 225 x 124 x 41 DC Output Terminals 2 ( V, -V) 6 (3x V, 3x -V) 6 (3x V, 3x -V) 6 (3x V, 3x -V) Max Miners (Wiring) 1 6 6 6 Best For 1 Bitaxe (5V) Multi-Bitaxe cluster (5V) 1-3 miners (12V) Large 12V clusters Mean Well LRS-350-12 Ideal Use Cases Solo Satoshi 12V mining rigs: Bitaxe GT 801, NerdQaxe Rev 6.1, and setups where 600W is unnecessary. LED strips, digital signage, CNC controllers, 3D printers, and any 12V DC project requiring up to 29A. General purpose DC bench supply where a rugged, enclosed, single output 12V unit is preferred. Makerspace and lab environments with space constraints (30 mm profile fits in 1U rack scenarios). LRS-350-12 Specifications Output: 12V DC, 29A, 348W. Input: 90 to 132 VAC or 180 to 264 VAC selectable by switch, 47 to 63 Hz. Voltage trim range: approximately 10.2V to 13.8V. Typical efficiency: 89%. Ripple and noise: up to 150 mVp-p. Dimensions: 215 x 115 x 30 mm, enclosed metal case with built in temperature controlled fan. Weight: approximately 0.76 kg. DC output terminals: 6 total (3x V on pins 7-9, 3x -V on pins 4-6). Maximum 2 wires per terminal screw. Protections: over voltage, overload, short circuit, over temperature with auto recovery (hiccup mode). Operating temperature: -25°C to 70°C with derating above 50°C. No-load power consumption: under 0.75W. Safety approvals: IEC/UL 62368-1 family plus related international standards. Warranty: 3-year Mean Well manufacturer warranty. Always set the AC input voltage selector correctly before first power up. Important Safety Notes Rated output is 12 volts at up to 29 amps (348 watts). For continuous duty, plan for no more than 80% of rating: approximately 278 watts or 23.2 amps. Never terminate more than two wires on a single screw terminal. Exceeding this limit compromises connection integrity and creates a fire hazard. The LRS-350-12 has six DC output terminals (3x V, 3x -V), supporting a maximum of six individual miner wire pairs. Set the input voltage selector to 115 or 230 volts before first power up. An incorrect setting can damage the unit or connected equipment. Always connect protective earth to the ground (FG) terminal. Disconnect AC mains before wiring or touching any terminals. Live contacts can cause serious injury or death. Mount in a ventilated, non-conductive enclosure and keep vents and fan clear. The unit will warm under sustained load. Use conductors sized for the current and length. For the main 12V feed, use heavy gauge wire sized to carry the total load. For branch circuits, use appropriately rated leads and fuse each branch. Use properly crimped ring or fork terminals and tighten terminal screws securely. Do not use bare stripped wire for high current connections. Verify polarity before energizing. Keep away from liquids, flammables, pets, and children. Indoor dry locations only. Do not short the output or reverse polarity. Do not parallel supplies unless you understand current sharing and use proper ORing methods. Adjust the voltage trim only with an insulated tool and only when it is safe to do so. Installation and servicing should be performed by qualified personnel and in accordance with local electrical codes. What Cables and Accessories Do I Need? The Mean Well LRS-350-12 uses screw terminal connections for both AC input and DC output. It does not include cables. You will need the following accessories to complete your wiring: AC Input: US 3 Prong AC Plug Pigtail (1 meter, 18 AWG) for connecting to your wall outlet. DC Output (12V miners with barrel jack): 5.5 x 2.1mm 90 Degree Barrel Jack Male Pigtail (1 meter, 16 AWG) for miners with barrel jack inputs. DC Output (12V miners with XT30): XT30 Female Pigtail (1 meter, 16 AWG) for miners with XT30 connectors like the NerdQaxe . When wiring multiple miners, remember the 2-wire-per-terminal rule. Each miner requires one positive and one negative lead. Plan your terminal assignments before you begin wiring to ensure no screw receives more than two conductors. Browse all available cords and adapters in the Solo Satoshi shop.