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Mean Well LRS-350-12 DC Switching Power Supply 12V 29A 350W for CCTV, Computer Project, 3D Printer, LED Strip Light, Router

4.7 4.7 out of 5 stars 1,082 ratings

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Typical price: $34.97
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LRS-350-12:12V/29A
1 PACK
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Purchase options and add-ons

Brand MeanWell
Color Silver
Connector Type Screw Terminal
Amperage 29 Amps
Form Factor SFX

About this item

  • Output Voltage: 12V ; Rated Current & Rated Power: 29A, 348W
  • Input Switch Default on 115VAC; Efficiency Level: 85% ;
  • Input Voltage Range: 90 ~ 132VAC / 180 ~ 264VAC by Switch;
  • Full Protections: Short Circuit / Overload / Over Voltage /Over Temperature. Case temperature>50℃ FAN ON, Case temperature<40℃ FAN OFF;
  • Fan only spins when Case Temprature higher than 122℉

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Customer reviews

4.7 out of 5 stars
1,082 global ratings

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Customers say

Customers are satisfied with the power supply's performance and build quality. They find it reliable, able to provide sufficient current, and reasonably priced. Many consider it a solid power supply from a reputable manufacturer. The fan power, voltage stability, and heat resistance are also appreciated. However, opinions differ on the noise level.

AI-generated from the text of customer reviews

55 customers mention "Works well"55 positive0 negative

Customers are satisfied with the power supply. They say it works well on their 3D printers, even in cold weather with a 159W load and no problems. The power supply works great for LEDs and is steady on their printers.

"Good trustworthy power supply. Has worked flawlessly for 3 years now. The only complaint I have is the fan, it is pretty loud when it kicks in." Read more

"I used this power supply for some Ham radios. It worked well, and seems to power my radio stably...." Read more

"...It's working great on a 159W load in cold weather down to 10 F." Read more

"...So, they are quite, in a electrical sense, and work reliably with my home brew 3D printer." Read more

33 customers mention "Power supply"28 positive5 negative

Customers are satisfied with the power supply. They find it lightweight, slim, and able to deliver a good amount of current. Many say it's the gold standard in DC power supplies, exceeding the factory power supply and working reliably with their 3D printers.

"...I might replace it with an AIO case and a larger fan. Great power supply so far." Read more

"...Exceeds the factory power supply" Read more

"Pros: Affordable, slim profile, clean output, maybe 10% more efficient than cheaper version...." Read more

"...Everyone in the lighting business knows that meanwell makes the best power supplies and I have ordered two of these over the past month...." Read more

30 customers mention "Build quality"30 positive0 negative

Customers like the power supply's build quality. They say it has a nice form factor and is reliable. The build quality is about what you'd expect, and it's thin compared to other PSUs. Meanwell is a reputable manufacturer and works very well. The power supply is stable, quiet, and has a better chassis than some cheap brands. It seems to be assembled with good components and last forever.

"Good trustworthy power supply. Has worked flawlessly for 3 years now. The only complaint I have is the fan, it is pretty loud when it kicks in." Read more

"...The body is well built, I never heard the fan come on, even after a fair bit of power draw, and the whole thing is utilitarian design, but well built..." Read more

"...TL;DR - The Meanwell power supply (sold by Hybridge) is a solid performer...." Read more

"...The supply also has a better chassis than some other cheap brands. It's working great on a 159W load in cold weather down to 10 F." Read more

15 customers mention "Value for money"15 positive0 negative

Customers appreciate the power supply's value for money. They find it useful and reasonably priced, working well for its intended purpose. The product is quiet and of high quality.

"...extra cables to buy and the limitations, it worked well and was a fair bit cheaper than a "ham radio" power supply." Read more

"As an amateur radio operator a good, low cost 12 volt (really 13.8 volt) power supply is always needed for something...." Read more

"Pros: Affordable, slim profile, clean output, maybe 10% more efficient than cheaper version...." Read more

"...and it carries safety certifications makes it worth the difference...." Read more

12 customers mention "Fan power"9 positive3 negative

Customers appreciate the power supply's fan. It runs only when needed, keeping it quiet and allowing stable power delivery for devices like radios, printers, and 3D printers. The fan never comes on after significant power usage, and it continues to provide power during power outages.

"...The body is well built, I never heard the fan come on, even after a fair bit of power draw, and the whole thing is utilitarian design, but well built..." Read more

"This power supply has a 12 Volt fan and it is thermostatically controlled for a much quieter operation. Exceeds the factory power supply" Read more

"...It lasted for 3 full print jobs and about an hour into the 4th and promptly died...." Read more

"...bolted inside, it has some heat to it when it's working, but the onboard fan, which only runs when needed, as to not make more nose than it needs too..." Read more

12 customers mention "Heat resistance"9 positive3 negative

Customers appreciate the power supply's heat resistance. It keeps the heat down to tolerable levels, allowing LEDs to operate cooler. The output is set at 10.5V, so the hot end and bed heat up noticeably faster now. The fan is thermostatically controlled for quieter operation, and the board appears solid with no hot spots.

"This power supply has a 12 Volt fan and it is thermostatically controlled for a much quieter operation. Exceeds the factory power supply" Read more

"...power “12-volt” LED strips where the output is set at 10.5V so LEDs operate cooler...." Read more

"...The hot end and bed heat up noticeably faster now. The hot end ticks up ~9 degrees a second." Read more

"...strips on it so the fan has never turned on and it has never even felt warm to the touch. I hope the fan works if i ever need it lol...." Read more

12 customers mention "Voltage stability"12 positive0 negative

Customers appreciate the power supply's stable voltage. They say it stays at the set voltage even after drawing power. The output voltage can be adjusted to 13.8 volts, and the adjustable screw is available in case you need to tweak the voltage. The unit is quiet and solidly made, with no perceptible noise added to their radio.

"...Nice, slim case, able to fine-tune the voltage, and very clean looking inside. A solid buy. Received the product in a timely manner...." Read more

"...Either way, the adjustable screw is available in case you need to tweak the voltage...." Read more

"...Voltage easily adjusted to 13.8 volts though the pot is a bit sensitive it got close enough, 13.7 volt...." Read more

"...The output voltage is adjustable. Presently using to power “12-volt” LED strips where the output is set at 10.5V so LEDs operate cooler...." Read more

36 customers mention "Noise level"20 positive16 negative

Customers have different views on the noise level of the power supply. Some find it quiet, with no coil whine or high-pitched noises. Others mention that the fan seems loud and there is a loud electrical whine as the unit warms up.

"...This was what the company recommended and the loud noise was gone." Read more

"...The only complaint I have is the fan, it is pretty loud when it kicks in." Read more

"It’s quiet compared to the original power supply of the AnkerMake. Fan only comes on when it hits a certain temperature range A+ so far" Read more

"...has a 12 Volt fan and it is thermostatically controlled for a much quieter operation. Exceeds the factory power supply" Read more

Solid performer. Nice clean design.
5 out of 5 stars
Solid performer. Nice clean design.
Review of the MEANWELL LRS-350-24 DC switching power supplyTL;DR - The Meanwell power supply (sold by Hybridge) is a solid performer. Nice, slim case, able to fine-tune the voltage, and very clean looking inside. A solid buy.Received the product in a timely manner. Boxed nicely, and included mounting feet (which is nice). Picture one reflects that. The unit is input voltage switchable (115v or 230v)The unit internally has a nice clean layout. I did not look on the underside of the circuit board, only the top (pictured) side.The fan is removable (if you wish to add another). 60mm square, 15 mm thick. There was a mention that the fan seems a bit loud, and I would concur. Also, trying to determine what triggers the fan to come on. The docs seem to indicate based upon thermal temperature, but it would also appear to be based upon current draw. If I pull 6amps on the unit (out of 15) the power supply doesn't get warm however, the fan will kick on anyhow. It does seem variable in that if I decrease the load, the fan slows down. Fortunately, I have this mounted in a closet so it is not noticeable.One other mention about the fan. It is an ARX DC Brushless, 12v 0.13a, 15 cfm fan. If you google for that fan, it is sold on here for like $24 - $27 (elsewhere $16 to $18). For a basic fan, seems quite high in price considering the noise it produces.The power supply has external access to a trim-pot allowing to tweak the desired voltage. I took several voltage measurements of the unit itself (One of the pictures I combined all the differences to). Ultimately, there is a +/- of almost 5v swing.For a brief, I observed the following:24.19v - out of the box measurement20.89v - Adjusted all the way down29.94v - adjusted all the way up.Upper-right image on the measurement picture was just me setting it to 24v when I was done measuring.There are 6 terminals for output (3 for positive(+), 3 for negative(-)). There are three terminals for the main voltage (Neutral, Line, ground). About the only ding I give here is that unlike other power supplies on the market, the Meanwell does not come with that little plastic swing cover to cover over the terminals.I have a 6 amp load of LED strips, and wanted something that could handle double-that in the future, so I ended up with the 15amp (14.6a technically) power supply (leaving me 20% overhead so not ever fully loaded, which is how you should plan your projects). Final two pictures show's the supply working, and my mounted project :)All in all, I am happy with the purchase. It does what it is supposed-to.
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Top reviews from the United States

  • Reviewed in the United States on August 10, 2024
    Style: LRS-350-24:24V/14.6ASize: 1 PACKVerified Purchase
    Good trustworthy power supply. Has worked flawlessly for 3 years now. The only complaint I have is the fan, it is pretty loud when it kicks in.
  • Reviewed in the United States on December 26, 2020
    Style: LRS-350-12:12V/29ASize: 1 PACKVerified Purchase
    I used this power supply for some Ham radios. It worked well, and seems to power my radio stably. I don't have any insight into RFI since I was just doing some VHF/UHF stuff which isn't as susceptible.

    The body is well built, I never heard the fan come on, even after a fair bit of power draw, and the whole thing is utilitarian design, but well built. Just be careful with the power lugs being exposed - it's not particularly safe, although the plastic separators makes it take effort to touch them. I put some electrical tape over the top after wiring it up to make it marginally safer.

    There's no power switch. I just pulled the power cable from the wall.

    Do note that it doesn't come with any cables (no wall cable, nothing), so you're on the hook for wiring it up to wall power, and then whatever connections you want. I bought an unterminated power cable from home depot to plug into the wall, and some various short jumper wires to the connectors I needed.

    Even with the extra cables to buy and the limitations, it worked well and was a fair bit cheaper than a "ham radio" power supply.
    One person found this helpful
    Report
  • Reviewed in the United States on October 9, 2024
    Style: LRS-350-24:24V/14.6ASize: 1 PACKVerified Purchase
    Power supply was going out on my Ankermake M5. This was what the company recommended and the loud noise was gone.
  • Reviewed in the United States on October 23, 2020
    Style: LRS-350-24:24V/14.6ASize: 1 PACKVerified Purchase
    Review of the MEANWELL LRS-350-24 DC switching power supply

    TL;DR - The Meanwell power supply (sold by Hybridge) is a solid performer. Nice, slim case, able to fine-tune the voltage, and very clean looking inside. A solid buy.

    Received the product in a timely manner. Boxed nicely, and included mounting feet (which is nice). Picture one reflects that. The unit is input voltage switchable (115v or 230v)

    The unit internally has a nice clean layout. I did not look on the underside of the circuit board, only the top (pictured) side.

    The fan is removable (if you wish to add another). 60mm square, 15 mm thick. There was a mention that the fan seems a bit loud, and I would concur. Also, trying to determine what triggers the fan to come on. The docs seem to indicate based upon thermal temperature, but it would also appear to be based upon current draw. If I pull 6amps on the unit (out of 15) the power supply doesn't get warm however, the fan will kick on anyhow. It does seem variable in that if I decrease the load, the fan slows down. Fortunately, I have this mounted in a closet so it is not noticeable.

    One other mention about the fan. It is an ARX DC Brushless, 12v 0.13a, 15 cfm fan. If you google for that fan, it is sold on here for like $24 - $27 (elsewhere $16 to $18). For a basic fan, seems quite high in price considering the noise it produces.

    The power supply has external access to a trim-pot allowing to tweak the desired voltage. I took several voltage measurements of the unit itself (One of the pictures I combined all the differences to). Ultimately, there is a +/- of almost 5v swing.
    For a brief, I observed the following:

    24.19v - out of the box measurement
    20.89v - Adjusted all the way down
    29.94v - adjusted all the way up.

    Upper-right image on the measurement picture was just me setting it to 24v when I was done measuring.

    There are 6 terminals for output (3 for positive(+), 3 for negative(-)). There are three terminals for the main voltage (Neutral, Line, ground). About the only ding I give here is that unlike other power supplies on the market, the Meanwell does not come with that little plastic swing cover to cover over the terminals.

    I have a 6 amp load of LED strips, and wanted something that could handle double-that in the future, so I ended up with the 15amp (14.6a technically) power supply (leaving me 20% overhead so not ever fully loaded, which is how you should plan your projects). Final two pictures show's the supply working, and my mounted project :)

    All in all, I am happy with the purchase. It does what it is supposed-to.
    Customer image
    5.0 out of 5 stars Solid performer. Nice clean design.
    Reviewed in the United States on October 23, 2020
    Review of the MEANWELL LRS-350-24 DC switching power supply

    TL;DR - The Meanwell power supply (sold by Hybridge) is a solid performer. Nice, slim case, able to fine-tune the voltage, and very clean looking inside. A solid buy.

    Received the product in a timely manner. Boxed nicely, and included mounting feet (which is nice). Picture one reflects that. The unit is input voltage switchable (115v or 230v)

    The unit internally has a nice clean layout. I did not look on the underside of the circuit board, only the top (pictured) side.

    The fan is removable (if you wish to add another). 60mm square, 15 mm thick. There was a mention that the fan seems a bit loud, and I would concur. Also, trying to determine what triggers the fan to come on. The docs seem to indicate based upon thermal temperature, but it would also appear to be based upon current draw. If I pull 6amps on the unit (out of 15) the power supply doesn't get warm however, the fan will kick on anyhow. It does seem variable in that if I decrease the load, the fan slows down. Fortunately, I have this mounted in a closet so it is not noticeable.

    One other mention about the fan. It is an ARX DC Brushless, 12v 0.13a, 15 cfm fan. If you google for that fan, it is sold on here for like $24 - $27 (elsewhere $16 to $18). For a basic fan, seems quite high in price considering the noise it produces.

    The power supply has external access to a trim-pot allowing to tweak the desired voltage. I took several voltage measurements of the unit itself (One of the pictures I combined all the differences to). Ultimately, there is a +/- of almost 5v swing.
    For a brief, I observed the following:

    24.19v - out of the box measurement
    20.89v - Adjusted all the way down
    29.94v - adjusted all the way up.

    Upper-right image on the measurement picture was just me setting it to 24v when I was done measuring.

    There are 6 terminals for output (3 for positive(+), 3 for negative(-)). There are three terminals for the main voltage (Neutral, Line, ground). About the only ding I give here is that unlike other power supplies on the market, the Meanwell does not come with that little plastic swing cover to cover over the terminals.

    I have a 6 amp load of LED strips, and wanted something that could handle double-that in the future, so I ended up with the 15amp (14.6a technically) power supply (leaving me 20% overhead so not ever fully loaded, which is how you should plan your projects). Final two pictures show's the supply working, and my mounted project :)

    All in all, I am happy with the purchase. It does what it is supposed-to.
    Images in this review
    Customer image Customer image Customer image Customer image Customer image Customer image Customer image Customer image
    Customer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer image
    28 people found this helpful
    Report
  • Reviewed in the United States on January 30, 2024
    Style: LRS-350-12:12V/29ASize: 1 PACKVerified Purchase
    These are some of the more low profile powersupplies I've seen. I'm using them to power RGB Pixel controller boards. Out of the box, the multimeter read 12.04V but mine has never been calibrated. Either way, the adjustable screw is available in case you need to tweak the voltage.

    Standard 3-wire in (ground, neutral, load), and 3 sets of postive (VDC+) and negative (VDC-) connections.
  • Reviewed in the United States on June 15, 2020
    Style: LRS-350-24:24V/14.6ASize: 1 PACKVerified Purchase
    I wish this supply had covered screw terminals, split between the AC and DC sides. Using this for FFF systems, and TEC modules. A lot of people look for these as a replacement power supply for the Ender 3 from Creality. If you are one of those people, be aware that this unit is much slimmer than the original PSU and the screw pattern is slightly different. It will fit the frame if you want, but the switch plate which comes with the machine will be the wrong size, print a new one from Thingiverse.
    One person found this helpful
    Report
  • Reviewed in the United States on September 1, 2020
    Style: RSP-500-24:24V/21ASize: 1 PACKVerified Purchase
    My OEM Ender 3 power supply died due to a busted capacitor. I'm running a Raspberry Pi, some LEDs and main board with an Ender Extender 400XL kit. Not sure if the OEM PS couldn't handle all the extra power load, so I got this unit, which will supply 500W vs the OEM 360W. I tried the Mean well 350W model but the printer would reset after bed heating, on the nozzle temp ramp up, so I either had a bad unit or too much power demand. Easy switch over to reconnect the OEM power switch and power to the 500. It's a slimmer case than the OEM with a smaller fan than the Meanwell 350W.

    The fan turn on and off when needed and is the loudest fan on my printer. It doesn't always run, so that's good. I might replace it with an AIO case and a larger fan. Great power supply so far.
  • Reviewed in the United States on January 1, 2021
    Style: LRS-350-24:24V/14.6ASize: 1 PACKVerified Purchase
    Driving 3 50W LED lights and 1 9W for a total of 159W. A 350W supply to drive 159W, seems like over kill. Well I have tried 3 other brands of low cost power supplies at loads of about 75% capacity and I get what some call chirping. That being the light flashes on and off then repeats in a couple of seconds. I call that over current shutdown by the supply and a retry. Over current shutdown with 75% load is bad. This gets worse at temperatures below 30 F. I have not loaded this brand above 159W and cannot say if this brand suffers from the same under rating issue. The supply also has a better chassis than some other cheap brands. It's working great on a 159W load in cold weather down to 10 F.

Top reviews from other countries

Translate all reviews to English
  • Edwin Rafael Morales Seañez
    5.0 out of 5 stars Excelente producto
    Reviewed in Mexico on March 7, 2022
    Style: LRS-350-24:24V/14.6ASize: 1 PACKVerified Purchase
    Modelo correcto y de calidad. Me sirvió bien para una ender 3 v2
  • G. D.
    5.0 out of 5 stars Good one
    Reviewed in Canada on January 26, 2022
    Style: LRS-350-24:24V/14.6ASize: 1 PACKVerified Purchase
    Good the fan start when it come hot around 50C and will stop as soon the temp lower down.
  • Shawn
    3.0 out of 5 stars Doesn't come with mounting brackets like in the main picture
    Reviewed in Canada on July 28, 2023
    Style: LRS-350-24:24V/14.6ASize: 1 PACKVerified Purchase
    I bought this particular 24v power supply because in the picture it clearly shows that it comes with the mounting brackets to attach it to a wall. When I received both packages, neither of them had mounting brackets included. It's disappointing when the main picture shows something that isn't actually included. I am sure it works fine but I returned it on principle so I have no idea.