The Best 12V 40A Power Supply of 2022 – Reviews & Buying Guide

After hours researching and comparing all models on the market, we find out the Best 12V 40A Power Supply of 2022. Check our ranking below.

2,993 Reviews Scanned

Rank No. #1

REALSUN 12V 40A Universal Switching Power Converter Adapter Transformer Regulated Supply AC to DC LED Driver 480w for CCTV, Radio, Computer Project, 215mm * 115mm *50mm

The Model of LED Driver:Input Voltage: AC110V/220V, Output Voltage:DC 12V, Output Current: 0~40A
Wide Range of LED Power Supply: Widely used in Industrial automation, LED display, CCTV, Radio, Computer Project, LED Strip Lights, 3D Printer etc.
It comes with built-in cooling fan and many holes on the metal case, which makes heat dissipation more efficient.and high efficiency, high reliability and stable performance.
Protection Function: over load protection, over voltage protection, short circuit protection, this protection will protect your load well. NOTE: before using, please select the input voltage according to your local voltage, to avoid damaging.
Service: If you have any problem of our product, you can contact us. we would be delighted to help you and reply you as soon as we can.

Rank No. #2

BOSYTRO 12V DC Power Supply 480W 40A AC to DC Converter Switching Power Supply for Led Strip, Motor Pump, CCTV, 3D Printer, Electronic Instruments, Lab Computer

【Upgrade ac to dc converter】Compared with the old power supply, we have retained 3 sets of output channels, but upgraded the input channels. The old power supply needs to be connected to the input through wiring. We have upgraded the input method, greatly improving the connection efficiency. In addition, we have added a safety switch, which can more conveniently start or turn off the power supply. On the other hand, the safety switch can also be used to quickly determine whether the power supply is normal
【12 Volt Power Supply】Input voltage 110v-240v ac, output voltage 12v dc, adjustable range: ±10%; Output current Mainly depends on your decive, such as DC 10A/120W, 20A/240W, 40A/480W, max current up to 40A, max output power 480W, For more efficient and secure use, recommended for equipment below 384w
【Intelligent Cooling System】The 12v 480w power supply with aluminum alloy shell and designed with multiple holes for better heat dissipation, Built-in intelligent Cooling Fan to prevent overheating and burning of circuit boards, when the working temperature is more than 122℉(45℃), the power supply will automatically run to dissipate
【Multiple Protection】BOSYTRO switching power supply features a overload protection, over-current protection, over-temperature protection, short circuit protection which can protect your device from damage. Safe and stable working, suitable for newer and experienced electrician
【Wide Application】This 12v power supply widely used in industrial equipment, RV, radio/car stereos, led strip, cctv, computer project, 3d printer, motor pump(for Motor device, the peak power of the SMPS needs to be more than 2 times the power of the Motor), security camera, lcd monitor, lab computer and more 12 volt device

SaleRank No. #3

DC 12V 50A 600W Power Supply Adapter Transformer Switch AC 110V / 220V to DC 12V 20amp Switching Converter LED Driver for LED Strip Light CCTV Camera Security System Radio,Computer Project,3D Printer

Switch Power Supply Convert AC 110V/220V to DC 12V 50A 600W: The default input voltage is 110V, Output voltage is adjustable 10% , Metal case with many holes makes heat dissipation more efficient.
AC 110V/220V Input Voltage: We have already adjusted the switcher to 110V/115V for our US customers, if you want to use AC220V,don't forget to adjust the switch to the 220V side before use.★AC 110V/220V.Wide voltage input adjusted automatically to SMPS Model (12V 1A-5A, 12W-60W). As for Model (12V 10A-60A 120W-600W), there is a voltage selector switch located on the side of the switcher is used to set the input voltage to the power supply to either 110V/115V or 220V/230V.
High Efficiency and Reliability: Smart device surge protection for Short-circuit Protection, Overload Protection, Over Voltage, Over Temperature Protection. Low Temperature Rise.★Voltage consistency:There is no voltage fluctuations to speak of at power on, during transmit, receive, or at power off.★Built-in EMI filter, low output ripple, noise, Rugged heavy duty enclosure, 100% Full load burn-in Tested. Parallel/Redundancy Operation is possible.
Widely used in: Wide input voltage range, steady and precise output voltage.Great power transformer for Led Lighting and CCTV Camera Security System, communications & home appliance electronic equipment etc.
After-Sales Guarantee: Enjoy a 30-day refund policy and a 2-year warranty. We strive to provide an exceptional shopping experience for our customers. If you have any questions about our product, our support team is available 24/7 to assist you.

Rank No. #4

Henxlco AC 110V/220V to DC 12V 40A 480W Universal Regulated Switching Power Supply Adapter Transformer Driver Converter for LED Strip Light, CCTV Security Camera System, Computer Project, black

Dual input voltage: AC 110V/220V. Output: DC 12V 40A max, Output voltage is adjustable ±15%. IN-DOOR USE ONLY!
Two sets of output Channel. With two independent output channels, it can power more devices. The maximum output of each channel can reach 40A 480W. Total output power of the two channels is 40A 480W.
Works with device that draws less than 40A, such as DC 12V 1A~30A. The max use of power should be no more than 80% of the full loads 32A 384W.
Over Voltage Protection, Overload Protection，Over Current Protection, Over Temperature Protection， Short Circuit Protection
High quality Widely used in Industrial automation, electronic equipment, LED display, LED Lighting, LED Strip, CCTV cameras Security System, Computer Project, home appliance etc.

Rank No. #5

DC 12V 50A 600W Power Supply Switch 110V/220 AC to 12V DC Converter PSU SMPS Adapter Adjustable Universal Transformer for RV, Radio/Car Stereos, LED Strip, CCTV, Computer Project, 3D Printer Black

【ADJUSTABLE VOLTAGE AND CURRENT】Input voltage: AC 110V / 220V (85-145V / 185-265V); Output Range (12V 1A-5A, 12W-60W ) or (12V 10A-50A 120W-600W), voltage input will adjust automatically to SMPS Model, Output current Mainly depends on your device, e.g.DC 10A 120W, 20A 240W, 40A 480W. Max current up to 50A, Power 600W.
【NEW VERSION AC TO DC CONVERTER】This Switch Transformer build with Black matte Aluminum alloy shell, that is sturdy and will not scratch. Built-in wire integrated design, Dual power connection methods. all copper nickel-plated terminal material, Super convenient for devices with clamps. You can clamp to the two cylindrical contacts directly. which has good electrical conductivity and high conversion efficiency , corrosion resistance,aging resistant.
【SMART COOLING SYSTEM】600W Power Converters Aluminum Shell are designed with many heat dissipation holes, Built-in Cooling fan and dust-proof net, which effectively prevent dust from entering, ensure the stable rotation of the electric fan and prevent the circuit board from burning ; moreover, anti-skid pads are added to the bottom in this 110v to 12v converter, which can also make the bottom better heat dissipation and work more stable.
【SAFE & STABLE】Switching power supply overload protection, over voltage protection, Leakage protection and short circuit protection function. The 12V Converter , power cord and plug have passed UL,CE,RoHS Certifications. One Key Operate: With red button on/off switch function, more safe and convenient power start/stop operation. Net weight only 2.6 Pounds(1.18kg), Light and Portable.
【APPLICATIONS WIDELY】Perfect Choice to Power LED Strips, 3D Printer Power Supply, Camper Power Converter, CCTV Power Supply, Medical Power Supply. It also used in industrial automation Equipment, Car Stereos, Radio, Motor, Computer Project, Boat, Humidifier, Brushless Motor,Household Appliances, Electronic Devices. Automation Equipment, Computer Project-Servos, Planting, Research Rooms, Air Compressors, Displays and more 12V Device.

Rank No. #6

EAGWELL AC to DC Converter 12V Power Supply,Universal SMPS 120V AC to 12V 50A 600W DC Converter Power Supply Transformer Driver Adapter for RV,Pump,LED Strip, LCD Monitor

Dual Voltage Input + Auto-Adjust Power Smartness .Supports Input voltage: AC 110V / 220V (85-145V / 185-265V); Output current depends on the device, e.g.DC 12V 10A 120W, 20A 240W, 35A 420W, and the peak current is 50A, peak power 600W. Recommended for equipment below 40A 480W. For resistive device, SMPS peak power ≥ device power × 1.25 times. For Motor device, the peak power of the SMPS needs to be more than 2 times the power of the Motor
One Key Operate .Eagwell ac to dc converter built-in Wire Integrated Design,You can clamp directly the "+" and "- "rod with battery clips, It is US patent. This 12v power supply with on/off switch , more safe and convenient power start/stop operation
Plug-and-Play Setup with All-Inclusive Kit .Eagwell ac to dc Converter Includes UL-listed power cord, 12v power supply 600w, cigarette lighter socket, wire lugs, metal clips, and screws—everything you need for clamp-style device connections. Dual wiring options (direct wire + terminal clamps) fit DIY projects, RVs, or industrial setups. No extra tools required
Built-In Smart Cooling System .This 110V to 12V Converter Aluminum alloy shell with integrated heat-dissipation holes + dust-proof fan net. Fan kicks in automatically when temps rise, keeping the converter cool under load—extends lifespan and prevents burnout. No noisy overheating like generic models
5-Layer Safety Protection .Eagwell 12V 50A 600W Power Supply Converter Overload, overvoltage, short circuit, overheat, and leakage protection—built into the heavy-duty copper-nickel terminals. Built-in EMI filter reduces interference for clean power.UL, CE, RoHS certified for worry-free use. Ideal for sensitive equipment (CCTV, medical devices) and harsh environments (boats, workshops)

SaleRank No. #7

New Version 110V to 12V DC Converter, IMAYCC AC to DC Converter 600W 50A,120V to 12V Power Supply, Adjustable Power Supply

👍【Adjustable Voltage Converter】Input voltage: AC 110V / 220V (85-145V / 185-265V); Output current depends on the device, e.g.DC 12V 10A 120W, 20A 240W, 35A 420W, and the peak current is 50A, peak power 600W. Recommended for equipment below 40A 480W. For resistive device, SMPS peak power ≥ device power × 1.25 times. For Motor device, the peak power of the SMPS needs to be more than 2 times the power of the Motor.
👍【Convenient for 12V Device】This DC Converter include 2 sets copper Clamps and wires , it will be easy to connect the 12V Pump , heater , Car Stereo and Car Cigarette Lighter Socket Device; With on/off switch , more safe and convenient power start/stop operation
👍【Exquisite workmanship 】The connecting terminals of the product are made of full copper nickel-plated terminal material, with good conductivity and high conversion efficiency ; and the product shell is made of aluminium alloy, with a number of mounting holes reserved for easy installation; the bottom with non-slip pads, convenient for fixing and heat dissipation.
👍【Safety and Stable,Long Service Life 】Design with Automatic overload cut-off, over Voltage cut-off, automatic thermal cut-off, short circuit protection.Equipped with a built-in cooling fan,which keep the device working long stable. IMAYCC 600w converter power supply, power cord and plug all have passed UL,CE,RoHS Certifications.
👍【Widely Applications 】power supplies for devices different currents/watts. Used for DC 12V Pump, PCP Air Compressor,Winch, Car Jack, Car Stereos, Amplifier, Radios, LED Light Strip, Brushless Motor, Household Appliances, Electronic Devices, Automation Equipment, Computer Project, Servos,Tire Inflator,Vacuum Cleaners etc.

Rank No. #8

EXENWING 12V 40A丨480W Power Supply Adapter AC to DC Universal Converter 110/220V to 12Volt Regulated Switching Transformer PSU for LED Strip Light 3D Printer Car Stereo CCTV Camera Diesel Heater

【AC TO DC CONVERTER 12V POWER SUPPLY】-Input: AC 110/220V 50 / 60Hz; Output: Default DC 12V,Adjustable range: ±10%,form 10.8V-13.2V, which greatly expand its application range. Maximum 40A 480watt power.Please select a power supply at least 20% larger than your device's rated power,good for safety.Three sets of output channels available,it can power more devices. Net weight: 1.65 lbs. Dimension: 8.46 X 4.52 X 1.96 inch
【Good Heat Dissipation】-This AC to DC universal power supply transformer 110V to 12V is made of metal material with many holes,which makes heat dissipation more effictive and ensures stability.Built-in cooling fan will keep running all the time with a little noise once it is powered to protect the converter against overheating.🔺Non-waterproof, In-Door Use Only!
【Switchable Dual Input Regulated Voltage Converter】-There is a voltage switch located on the side of the convetert,our factory setting for US customers is 110V.If you want to use AC 220V,please don't forget to adjust the switch to the 230V(220V) side before use to avoid damaging.AC 110V/220V is just according to your local voltage.
【SAFETY PERFORMANCE】-100% full load burn-in tested,guaranteed security. With smart chips provide automatic overload cut-off / over Voltage cut-off / automatic thermal cut-off / short circuit protection.protect your electronic products from destruction.There is no voltage fluctuations at power on, during transmit, receive, or at power off.Built-in EMI filter, low output ripple.
【HOW TO CHOOSE？】This unit convert AC mains power to DC 12Volt,peak power is 40A 480watts, work perfectly with most 12V devices under 600W, such as LED strips light,3D printer, diesel heater,ham radio,etc. It will automatically outputs 0~40A current to match your device, the actual current is depended on the load,such as 10A(120W), 20A(240W), 30A(360W)....Make sure your device match the 12V voltage and current less than 40Amper.Please DON'T run it overload.

SaleRank No. #9

HuanQiuSensmart 110V AC to 12V DC Transformer, 12V 500W 40A Switching Power Converter, Built-in Cooling Fan, with Various Power adapters.

Dual Input Voltage: The input voltage of the switching power supply converter supports AC 110V-120V and 220V-240V. Power converter output range (12V, 1A-5A/12W-60W) or (12V, 10A-40A/120W-400W). The voltage input will automatically adjust to the SMPS model, and the output current mainly depends on your equipment. The dual-input voltage converter is suitable for a variety of power supply scenarios. For example, when working in different regions or places, equipment can be connected to different power supplies, providing more Great flexibility and reliability.
High Quality Material: Full copper nickel-plated terminal material, good conductivity, high conversion efficiency, corrosion resistance, aging resistance, the power converter is not limited by time and space, lightweight and portable, and more convenient to operate. There are multiple heat dissipation holes on the surface of the power converter, and a built-in cooling fan and dust filter, which not only effectively prevent dust from entering but also dissipate heat more efficiently. The package comes with alligator clips and car cigarette lighter positive and negative cables.
Wide Application: The power cord plug sold as a package is suitable for various scenarios and is used in large power transformers for Led lighting and CCTV camera security systems, communications and household appliances and electronic equipment, etc.
Safety Features: The 12V switching power supply converter has functions such as short circuit, overvoltage, overload, overtemperature, overcurrent, and low voltage protection.
Service Guarantee: We are committed to providing high-quality service, if you have any questions about the power converter, please contact us and we will try our best to solve the problem.

Rank No. #10

DIGISHUO DC 12V 40A 480W Power Supply Adapter Transformer Switch AC 110V/220V to DC 12V 40Amp Switching Converter LED Driver for LED Strip Light | CCTV| Camera Security System| 3D Printer

[12V 40A Power Supply] Input: AC 110V/220V 50/60Hz Output:DC 12V Max 40A 480W. Two output ports. Each port outputs 0~40A automatically to match your device, 40A max in total for 2 ports. The default output voltage is 12V, but it can be regulated by 5%, from 11.9V to 12.1V
[Supply less than 40A such as 1A,5A,10A,20A,30A] For example, if your device draws 7.5A, then 7.5A will be supplied. If draws more than 10A, only 10A will be supplied and power supply will be damaged soon. NEVER OVERLOAD
[Widely Application]Great for LED Strips,3D Printer,ham radio transceiver,CCTV cameras,car subwoofer amp,audio amplifier,wireless router,ADSL Cats,HUB,audio/ video power supply etc
[Protection]Shortage Protection, Overload Protection, Over Voltage Protection
[Metal Case Protection]Maximum protection but IN-DOOR USE ONLY!

Last update on 2025-04-25 / Affiliate links / Images from Amazon Product Advertising API

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The Best 12V 40A Power Supply of 2022 – Reviews & Buying Guide

How Do You Buy The Best 12V 40A Power Supply?

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