SUPERNIGHT 12V 30A Switching Power Supply, 110-240 Volt AC to DC 360W Universal Regulated Switching Transformer Adapter Driver for 3D Printer, CCTV, Radio, LED Strip Lights,Computer Project
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AI Verdict
A raw, high-capacity 360W power supply that delivers stable 12V juice for 3D printers and LED projects, provided you don't mind wiring your own AC plug and dealing with a noisy fan.
This is a bare-bones industrial component, not a consumer plug-and-play device. It provides excellent, stable power for DIYers building 3D printers or massive LED arrays, but requires electrical know-how to wire safely. If you just need to power a single LED strip, this is massive overkill and a safety hazard.
If you want a plug-and-play solution without exposed wiring, look for a 12V 'brick' style power adapter with a standard 5.5x2.1mm barrel jack.
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Pros
- Delivers a full 360W (30A at 12V), easily powering massive LED strip arrays or dual-extruder 3D printers
- Output voltage is adjustable by ±10% via a small potentiometer to fine-tune for voltage drop over long cable runs
- Built-in thermal protection automatically kicks on the cooling fan when internal temps hit 45°C
- Screw terminal block accommodates multiple output wires simultaneously for complex setups
- Universal 110V/220V input compatibility makes it usable worldwide with manual switch selection
Cons
- Does not include an AC power cord — you have to cut and strip your own cable to wire it
- The cooling fan is notoriously loud and kicks on abruptly, making it annoying for quiet rooms
- Exposed AC screw terminals pose a shock hazard if you don't 3D print or buy a separate terminal cover
- The 110V/220V selector switch is sometimes set to 220V from the factory, which will cause failure if not checked before plugging into a US outlet
Dimension Scores
Delivers a stable 360W and holds voltage regulation well under heavy loads.
The 45°C thermal fan is notoriously loud and lacks variable speed control.
Standard stamped metal chassis with decent internal components, but exposed terminals are a safety minus.
Screw terminals allow for custom wire lengths, but the lack of a terminal cover makes it messy and potentially dangerous.
Best For
- Powering large-scale 12V LED strip installations in workshops or commercial displays
- Replacing a burnt-out power supply on a 12V 3D printer like an older Creality CR-10 or Anet A8
- Benchtop testing for 12V car audio amplifiers or ham radio transceivers
Not Recommended For
- Audio setups in quiet rooms, as the sudden fan noise will ruin the listening experience
- Beginners who aren't comfortable stripping AC wires and safely securing live voltage terminals
- Outdoor or damp environments, as the metal chassis has zero waterproofing
Watch Out For
- No power cord is included — you must supply and wire your own 3-prong AC cable to the screw terminals.
- The voltage selector switch is hidden on the side and often ships set to 220V; plugging it into a 110V outlet without flipping it first will cause it to fail.
- The AC and DC screw terminals are completely exposed, requiring you to fabricate a cover to prevent accidental shocks or shorts.
- The cooling fan isn't variable speed; it turns on at 100% RPM when it hits 45°C and sounds like a tiny jet engine.
Full Specifications
| ASIN | B01LATMSGS |
| Brand | SUPERNIGHT |
| Item Weight | 1.5 pounds |
| Manufacturer | SUPERNIGHT |
| Power Source | Corded Electric |
| Mounting Type | Rack Mount |
| Current Rating | 30 Amps |
| Item model number | 4328505387 |
| Product Dimensions | 8.46 x 4.53 x 1.97 inches |
| Is Discontinued By Manufacturer | No |
What Buyers Say
The lack of an included power cord catches many off guard—you have to wire the AC mains yourself. Once wired, the unit delivers rock-solid 12V power, easily handling demanding loads like heated 3D printer beds and massive LED arrays. The adjustable voltage pot is a lifesaver for fixing voltage drop on long cable runs. The thermal fan is a massive point of contention; it kicks on abruptly and is loud enough to be a dealbreaker for audio or home theater setups.
“Wired it up to an old PC power cord and it runs my massive LED setup perfectly, but the fan is so loud I had to mount it in a closet.”
Common Praise
- Holds a steady 12V output even when pushed near its 30A limit
- The ±10% voltage adjustment dial perfectly compensates for voltage drop on long LED strip runs
- Screw terminals make it incredibly easy to wire multiple devices to a single power supply
- Runs cool to the touch during normal operation thanks to the aggressive 45°C fan
Common Complaints
- The cooling fan sounds like a hair dryer and turns on abruptly
- Exposed AC terminals are a serious shock hazard without a custom 3D-printed cover
- Ships without any AC power cable or wiring instructions
- The 110V/220V switch is recessed and easy to miss before initial plug-in
Ownership Tips
- The fan bearing can start to whine after a few months of continuous 24/7 operation
- If you run it below 15A, the fan rarely ever needs to turn on
- You'll definitely want to 3D print a terminal cover to keep dust and stray fingers away from the live AC screws
Frequently Asked Questions
Does this come with a power cord to plug into the wall?
No. You have to provide your own 3-prong AC cable, strip the wires, and screw them into the Live, Neutral, and Ground terminals.
Can I use this outdoors for my patio LED lights?
Absolutely not. The metal casing is heavily vented and has zero waterproofing. It must be kept in a dry, indoor environment.
Why did my power supply pop as soon as I plugged it in?
You likely forgot to check the 110V/220V selector switch on the side. If it's set to 220V and you plug it into a 110V US outlet, it can damage the unit.
How loud is the cooling fan?
Very loud. It stays off until the unit hits 45°C, but when it kicks on, it runs at full speed and is easily audible across a quiet room.
Can I adjust the output voltage if my LED strips are dim at the end?
Yes, there is a small potentiometer near the terminal block that lets you adjust the 12V output by ±10% to compensate for voltage drop.
Is it safe to run this at exactly 30 Amps continuously?
It's not recommended. For continuous 24/7 loads, you should follow the 80% rule and keep your maximum draw around 24 Amps (288W) to prevent overheating.
Buying Guide
You are buying a raw industrial component, not a finished consumer product. You will need wire strippers, a spare AC power cord, and basic knowledge of Live, Neutral, and Ground wiring to even turn this on. It's designed to be mounted inside an enclosure or out of reach, as the screw terminals carry lethal mains voltage. Always double-check the recessed voltage selector switch before applying power, or you'll fry it instantly.
30A Max Current
Think of voltage as water pressure and current (Amps) as the volume of water. 30A means this can supply a massive amount of power—enough to run about 60 feet of high-density LED strips simultaneously.
Switching Power Supply
Instead of a massive, heavy copper transformer, this uses rapid electronic switching to convert AC to DC. It makes the unit much lighter and more efficient, but can introduce minor electrical noise.
±10% Voltage Adjustment
Power loses strength as it travels down long wires. This lets you bump the output up to 13V at the source so it arrives at your LEDs as a perfect 12V.
Alternatives
If you don't want to wire your own AC plug or deal with exposed terminals, search for a '12V 30A power adapter brick' or an enclosed ATX PC power supply.
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