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The Best Variable Voltage Dc Power Supply of 2023 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Variable Voltage Dc Power Supply of 2023. Check our ranking below.

2,190 Reviews Scanned

Rank No. #1

72W Power Supply Adjustable DC 3V ~ 24V Variable Universal Switching AC/DC Adapter 100V-240V AC to DC Converter with LED Voltage Display and 14 Tips, for 3V to 24V Household Electronics - 3000mA Max

【Adjustable Voltage】Input: AC 100~240V, 50/60Hz, Output Voltage can be adjusted from 3V to 24V DC (such as 3V 4V 4.5V 5V 5.5V 6V 9V 12V 14V 15V 19V 20V 24V). Wattage Max 3A, 72W; It can supply with amps less than 3A, such as 300mA, 500mA,1A, 1.5A, 2A, 2.5A, 3A.
【Upgraded Version Power Supply】Built-in protruding rotatable button for adjusting the voltage suitable for your device ,The LED displays real-time voltage,which helps you control real-time condition of charging. The knob can be adjusted more evenly, and it can reach 13V ~ 14V by rotating 50%. Increase the off gear to turn off the power without pulling the plug.
【Multiple DC Tips】Equipped with 14 frequently used plugs: Micro-USB, Type-C, DC terminal connector, 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm. Universal ac adapter equipped with a reverse polarity converter. Our DC plug polarity: inner positive(+), outer negative(-). you can use this reverse polarity converter, which expands the application range of the adapter to a greater extent.
【Widely Used】The 72W all-in-one multipurpose adapter fit for most AC/DC home appliances. Can be perfect for Wireless Router, ADSL Cats, HUB, Security Cameras, WiFi Camera, DVD Player, Audio/ Video device, 3D Printer, CCTV System, LCD Monitor, Bluetooth speaker, Sound bar, digital piano, portable Keyboard, IR illuminator, LED strip light and other household / portable devices. (Check dc jack before buy: 5.5x2.5mm, compatible 5.5x2.1mm)
【Worry-Free Shopping】Package includes 1 x 3~24V 72W universal ac/dc adapter, 14 x DC tips, 1 x reverse polarity converter. Built-in multiple safety protection systems and safe to use. All products tested and shipped. If you have any questions about the product, please feel free to contact us before returning. We support 30 days money back guarantee, 24 months free exchange.

SaleRank No. #2

NICE-POWER DC Power Supply Variable, 30V 5A Adjustable Switching Regulated Power Supply with Encoder, Upgraded 3-Digits LED Display, Mini Regulated DC Bench Power Supply

【Upgraded High-precision encoder knob】Just "set" Voltage and Current instead of "adjust". You can press the Voltage and Current encoder knob to select the Digit you want to adjust, then rotate the knob to set the value from 0-9. Each Digit can be set easily by the accurate encoder knob. The encoder switch replaces the potentiometer switch, making your work easier, more accurate and efficient.
【Precise 3-digit LED Display】The NICE-POWER DC bench power supply has a resolution of 0.1V and 0.01A, and you can easily adjust it in the range of 0-30V and 0-5A. The 3-digit back-lit LED display provides more accurate and clearly visible readings for the voltage and current value, even in conditions of low voltage.
【Small and Diverse Applications】Worried about the bulky power supply? This compact and sophisticated DC power supply weighs much less than a laptop at just 1.54 pounds, saving more space on your workbench. And you can use it in various scenarios such as laboratory, repair, electrolysis, burn-in test, electroplating, brush plating, electronic DIY, etc.
【Safe and Reliable to Use】Safety is our priority. The DC power supply is FCC/CE certified. The built-in fan low arc noise & low ripple,The power supply is durable and compact. Productive work since the power supply comes multiple protection of Over-voltage, over-current, over-power, over-temperature, short-circuit powerful protection function.
【Packaging and After-Sales】 1 x DC Power Supply, 1 x Power Cord, 1x Output Load Cord, 1 x User Manual, 1xWarranty Card. The variable dc power supply size is 6.5*4.0*3.2 inch, Weight is 1.54lb. You can easily take the DC power supply to work. We provide a 12-month warranty policy. If you have any technical questions about our power supply, please do not hesitate to contact us.

SaleRank No. #3

Kungber DC Power Supply Variable, 30V 10A Adjustable Switching Regulated DC Bench Power Supply with High Precision 4-Digits LED Display, 5V/2A USB Interface, Coarse and Fine Adjustments (Black)

High Precision 4-Digits LED Display: Kungber 30V 10A lab DC benchtop power supply is a professional laboratory power supply regulation device that has a high resolution of 0.01V and 0.01A. You can easily tune it within 0-30V and 0-10A. The backlit 4-digit LED display provides a more accurate readout for the voltage and current value, visible easily even in the low-light conditions.
Constant Voltage (C.V.) & Current (C.C.) Mode Automatic Conversion: Easy to dial in the desired voltage and current with the coarse and fine adjustment knob. The constant voltage/current mode can automatically switch with load changes. The conversion of constant voltage and constant current is indicated by the LED display on the front panel.
Compact and Various Application: This DC power supply is less than 3 lb and measures only 9.5 x 3.4 x 6.1 inches, applies for laboratory, school, repair, electrolyzation, electroplate, brush plating, lamp test, aging testing, battery charge, home DIY and other requirements. 5V/2A USB port could charge your cellphone and provide power for the device which you want to repair, no worry about running out of power.
Reliable and Safety: many safety measures are adopt in Kungber lab DC power supply - Grounding wire, Leakage protection,Thermal protection, Voltage overload protection, Power overload protection and Short-circuit protection. Kungber power supply use premium electronic components, provide reliable working status and prolong the life of product effectively. When the working temperature is more than 122℉/50℃,the intelligent thermal protection will active the cooling fan to lower the temperature
What You Get - 1 x Kungber SPS3010 Variable DC Power Supply, 1 set of Output Power Cords , 1x Input Power Cord, 1 x User Manual, and Technical Support from Kungber.

Rank No. #4

Jesverty DC Power Supply Variable, 0-30V 0-10A Adjustable Switching DC Regulated Bench Power Supply with High Precision 4-Digit LED Display, 5V/2A USB Port, Coarse and Fine Adjustment SPS-3010

1️⃣【4-Digit Display & Power Calculation】: The Jesverty SPS series features a big bright 4-digit LED display that shows measured values of V／A／W that the unit outputs in real-time. The display resolution is up to 0.01V, 0.001A, and 0.1W.
2️⃣【Auto C.V. and C.C. Mode】: The Jesverty SPS series can be used as a constant-voltage*(C.V.) power supply and constant-current*(C.C.) power supply even when the load is changed. It switches automatically between CV mode and CC mode according to the changes in the load.
🌟Note: The V and A settings you set are the crossover point at which the mode switches.
3️⃣【Compact Body & Lightweight】: The Jesverty SPS series measured only 7.1(D)x3.35(W)x6.1(H)inches and weight of approx. 2.5lbs. It saves space on your workbench and can be moved around without any frustration.
4️⃣【Reliability and Safety】: The Jesverty SPS series is built with high-quality materials and reliable circuit designs that include multiple protection functions, such as short-circuit protection, over-load protection, grounding terminal, temperature-regulated fan, etc. to ensure performance and extend the lifespan.

SaleRank No. #5

SHNITPWR 30W Universal Power Supply 3V 4.5V 5V 6V 7.5V 9V 12V Adjustable Variable AC/DC Adapter with 5V 2.1A USB Port, 100V-240V AC to DC 3V~12V Converter 0.5A 1A 1.2A 1.5A 2A 2.5A Max with 14 Tips

Input: AC 100~240V, 50/60Hz; Output: DC 3V 4.5V 5V 6V 7.5V 9V 12V adjustable, Max 2.5A 30W; It can supply with any amp less than 2.5A, such as 300mA 500mA 800mA 1A 1.2A 1.5A 1.8A 2A 2.1A 2.2A 2.4A 2.5A. Equipped with a 5V 2.1A USB port at the bottom, you can connect any standard USB cable to it. (USB cable not included).
It comes with an original 5.5x2.5mm tip (inside"+", outside"-") and 14pcs frequently used tips: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C and DC terminal connector. We especially add a reverse polarity converter, which will double its application scope.
The 30W all-in-one multipurpose AC/DC adapter fit for many 3~12V under 30W small electronics such as LED strips, under-cabinet light, TV Box, smart speaks, wireless routers, essential oil diffuser humidifier, USB fan, Wifi IP camera, USB Hub, hard disk box, CD Player, DVD Player, DC motor, DC pump, digital photo frame, DVR NVR surveillance system etc. This product is an AC to DC adapter, NOT charger!!!It can’t be used to charge electronic devices with batteries, such as laptops. Otherwise, it may damage your device.
Built-in multiple safety protection systems. Automatic over voltage cut-off, over current cut-off, over temperature cut-off, short circuit cut-off. We focus on producing premium quality and safety power adapters. No noise, no spontaneous combustion, no explosion, no fire hazard, safe to use. 6ft long power cable makes it convenient to use.
Please choose correct voltage before plug it to your device. Wrong voltage may damage your device. We recommend to use less than 80% of the full load. We always stand behind our products. If there is any issue, please feel free to contact us. We have 30 days money back guarantee, 18 months exchange.

SaleRank No. #6

DC Power Supply Variable, Adjustable Switching Regulated (30 V 0-10A) with Encoder Coarse & Fine Adjustments Knob, Bench with USB & Type-C Quick-Charge Interface

Precise Encoder Knobs: Unlike other DC power supplies, the WANPTEK DPS3010U DC power supply uses a precise encoder adjustment. Press the knob to switch the number of digits and turn the knob to set the number. Let the direct setting value replace the adjustment value.
USB & Type-C Interface: The variable power supply has built-in fast charging protocol identification chip that supports USB & Type-C fast charging function, which is different from the ordinary USB charging interface in that it has a 5V/3.6A output that can quickly charge your mobile phones and or other devices or be used to charge the device to be repaired.
Short Circuit Alarm: In order to improve the safety of the dc power supply and prolonging its service life, we have designed a short circuit alarm for the dc power supply. When a short circuit occurs, the variable DC power supply will stop output and send out an alarm to remind you. Bench power supply also have safety protections such as overvoltage, overcurrent, overheating and overload.
Wide Applications: The adjustable power supply features an intelligent temperature-controlled fan and heat sink for excellent heat dissipation and is especially suitable for laboratory, electronic repair DIY, communication equipment maintenance, products line, scientific research and teaching units.
Packaging and After-Sales: 1 x variable dc power supply, 1 x output power cord, 1 x input power cord, 1 x user manual, We provide lifetime technical support. If you are not satisfied with the product you received, please feel free to contact us.

SaleRank No. #7

SHNITPWR 3V ~ 24V 3A 72W Power Supply Adjustable DC 3V 5V 6V 9V 12V 15V 16V 18V 19V 20V 24V Variable Universal AC/DC Adapter 100V-240V AC to DC Converter with 14 Tips 5.5x2.5mm 4.0x1.7mm 3.5x1.35mm

𝐈𝐧𝐩𝐮𝐭 𝐚𝐧𝐝 𝐎𝐮𝐭𝐩𝐮𝐭: Input: AC 100~240V, 50/60Hz ; Output: DC 3~24V Adjustable, Max 3A 72W ; It can supply with any voltage between 3~24V,such as 3V 4V 4.5V 5V 5.5V 6V 9V 12V 14V 15V 19V 20V 24V, etc and any amp less than 3A, such as 300mA, 500mA,1A, 1.5A, 2A, 2.5A, 3A. LCD display will show the output voltage, in case that wrong voltage regulation damage your device.
𝐔𝐩𝐠𝐫𝐚𝐝𝐞𝐝 𝐕𝐞𝐫𝐬𝐢𝐨𝐧 𝐏𝐨𝐰𝐞𝐫 𝐒𝐮𝐩𝐩𝐥𝐲: Based on hundreds of users feedback, we have made the following improvements: 1. The knob can be adjusted more evenly, and it can reach 13V ~ 14V by rotating 50%. 2. Increase the off gear to turn off the power without pulling the plug. 3.Add a polarity converter cable, which make it compatible with more devices，doubles its range of application.
𝟏𝟒𝐩𝐜𝐬 𝐅𝐫𝐞𝐪𝐮𝐞𝐧𝐭𝐥𝐲 𝐔𝐬𝐞𝐝 𝐓𝐢𝐩𝐬: It comes with an original 5.5x2.5mm tip and 14pcs frequently used tips: 6.5x4.4mm+Pin, 5.5x2.1mm, 5.5x3.0mm+Pin, 5.0x2.5mm, 6.3x3.0mm, 5.5x1.7mm, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm, Micro-USB, Type-C and DC terminal connector. Can be applied to almost all commonly used electronic devices. You can screw wires onto it easily, perfect for DIY projects.
𝐖𝐢𝐝𝐞 𝐑𝐚𝐧𝐠𝐞 𝐨𝐟 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬: The 72W all-in-one multipurpose AC/DC adapter fit for many 3~24V small household electronics such as LED strips, under-cabinet light, TV Box, smart speaks, wireless routers, essential oil diffuser humidifier, USB fan, Wifi camera, USB Hub, hard disk box, DC motor, DC pump, digital photo frame, DVR NVR surveillance system etc.For indoor use only.
𝐒𝐚𝐟𝐞𝐭𝐲 𝐏𝐫𝐨𝐭𝐞𝐜𝐭𝐢𝐨𝐧 𝐒𝐲𝐬𝐭𝐞𝐦𝐬: Built-in multiple safety protection systems. Automatic over voltage cut-off, over current cut-off, over temperature cut-off, short circuit cut-off. We focus on producing premium quality and safety power adapters. No noise, no spontaneous combustion, no explosion, no fire hazard, safe to use. 6ft long power cable makes it convenient to use.

SaleRank No. #8

DC Power Supply Variable, ENGINDOT 30V 5A Adjustable DC Bench Power Supply with 4 Digit LED Display, Data Hold, Coarse and Fine Adjustment (10mV, 1mA) with 110V/45.3" Alligator Lead

HIGHER PRECISION WITH DATA HOLD FUNCTION - ENGINDOT DC Power Supply uses digital control technology, you can switch between coarse and fine adjustment by simply pressing the encoder knob, customize each digit in the range of 0-9. Press both knobs simultaneously for 3 seconds to hold a set of values, then press for 3 seconds to release.
4 DIGITS CLEAR AND ACCURATE READOUTS - 0.01V and 0.01A resolution, you can easily adjust from 0-30V and 0-5A; 4-digit backlit LED display works even in low voltage conditions Provides more accurate and clearly visible readings of voltage and current values.
CONSTANT VOLTAGE (CV) AND CURRENT (CC) MODE - Adjust the coarse and fine adjustment knobs to easily dial in the required voltage and current; when the load current reaches the current limit value, it will automatically switch to the constant current mode, which can be easily seen to current and voltage as circuit elements switch.
MULTIPLE PROTECTIONS, SAFTY FIRST - ENGiNDOT bench power supply featured with grounding wire, thermal protection, voltage overload and short-circuit protection ensure the safety; The built-in fan reduce the operation noise, prolonging the life of product effectively. With an output button, this button can prevent you from damaging the device by forgetting to disconnect the output
VERSATILE USAGE - Compact and lightweight, doesn't take up of space, ideal for a variety of applications such as school lab experiments, cell phone repair, electronics production assurance specifications, and lab measurements.

Rank No. #9

72W Power Supply Adjustable DC 3V ~ 24V Variable Universal Switching AC/DC Adapter Minidodoca AC to DC Converter with LED Voltage Display and 16 Tips, for 3V to 24V Household Electronics - 3000mA Max

【Adjustable Voltage】Input: AC 100~240V, 50/60Hz, Output Voltage can be adjusted from 3V to 24V DC (such as 3V 4V 4.5V 5V 5.5V 6V 9V 12V 14V 15V 19V 20V 24V). Wattage Max 3A, 72W; It can supply with amps less than 3A, such as 300mA, 500mA,1A, 1.5A, 2A, 2.5A, 3A.
【Upgraded Version Power Supply】Built-in protruding rotatable button for adjusting the voltage suitable for your device ,The LED displays real-time voltage,which helps you control real-time condition of charging. The knob can be adjusted more evenly, and it can reach 13V ~ 14V by rotating 50%. Increase the off gear to turn off the power without pulling the plug.
【Multiple DC Tips】Equipped with 16 frequently used plugs: Micro-USB, Type-C, DC terminal connector, 6.5x4.4mm+Pin,6.3x3.0mm,5.5x1.7mm, 5.5x3.0mm+Pin, 4.8x1.7mm, 4.0x1.7mm, 3.5x1.35mm, 3.0x1.1mm, 2.5x0.7mm，5.5X2.5mm female to alligator clip，3pcs 5.5X2.5mm male connector with cable.
【Safety Protection Design】Built-in protruding rotatable button for adjusting the voltage suitable for your device,the LED displays real-time voltage,which helps you control real-time condition of charging. The power supply built-in multiple safety protection systems:Automatic over voltage cut-off, over current cut-off,over temperature cut-off,short circuit cut-off.No noise, no spontaneous combustion,no explosion,no fire hazard,safe to use
【Widely Used】The 72W all-in-one multipurpose adapter fit for most AC/DC home appliances. Can be perfect for Wireless Router, ADSL Cats, HUB, Security Cameras, WiFi Camera, DVD Player, Audio/ Video device, 3D Printer, CCTV System, LCD Monitor, Bluetooth speaker, Sound bar, digital piano, portable Keyboard, IR illuminator, LED strip light and other household / portable devices. (Check dc jack before buy: 5.5x2.5mm, compatible 5.5x2.1mm)

Rank No. #10

AlloverPower 3V - 24V 1.5A 36W Universal Adjustable DC Power Supply Kit AC Adapter Speed Control Volt Display ON Off Switch with Variable 8 Plugs

Adjustable and visable display voltage, can be adjusted the voltage from 3V - 24V through the display.
Input: AC 100-120V, Output: DC 3V - 24V, 1.5Amax.
Come with 8 Plugs, Fit for power supply needs in different Devices.
Special Buit-in Power on/off switch, more convenient and easy to control the adapter with this function.
All-in-1 Adapter - fit 90% of AC/DC Home & Outdoor appliances, widely use in multiple devices. (WON'T WORK ON COMPUTER!!!)

Rank No. #11

3V ~ 24V 1A Variable Power Supply Adapter 24W Adjustable AC to DC Adapter, 100-240V AC to DC 3-24 Volt 1 Amp Universal Transformer, 14 More Tips &1 Reverse Polarity Cable

Input: 100-240V 50/60Hz
Output: DC 3-24V Adjustable. e.g., 3V, 4V, 5V, 6V, 7V, 8V, 9V, 10V, 11V, 12V, 13V, 14V, 15V, 16V, 17V, 18V, 19V, 20V, 21V, 22V, 23V, 24V. And 1 Amp 24 Watts Max.
14 Tips +1 Polarity Converter: This multi-voltage switching power supply with more DC output Tips for your choices. It comes with an original 5.5x2.5mm and 14 tips: 2.5x0.7mm, 4.0x1.7mm, 4.8x1.7mm, 5.5x1.7mm, 5.5x3.0mm+Pin, 3.0x1.1mm, 6.5x4.4mm+Pin, 5.0x2.5mm, 3.5x1.35mm, 5.0x2.1mm, 6.3x3.0mm, Micro-USB, Type-C, DC Terminal Connector and 1 Reverse Polarity Converter Cable 5.5x2.1mm (The polarity of DC Output Port can be changed through this converter).
Multiple Protections with smart chip to ensure the safety and stability: automatically over temperature cut-off, short-circuit cut-off, under-voltage protection, over voltage cut-off and over-current cut-off.
This 24W max. all-in-one AC/DC multi-Voltage universal power supply will be suitable for 3 - 24V devices such as LED strips, under-cabinet light, TV Box, smart speaks, wireless routers, essential oil diffuser humidifier, USB fan, WiFi camera, USB Hub, hard disk box, DC motor, DC pump, digital photo frame, DVR NVR surveillance system etc...

SaleRank No. #12

New Version DC Converter Digital Display 110V, IMAYCC 48V Adjustable dc Power Supply 480W,Variable Switch Transformer Regulated 5V 10V 12V 24V 48V Buck Converter for Car,CCTV Computer Lab.

✔【Upgraded LED Display】This 48V Power supply is equipped with LED Screen , which can clearly display the output voltage and current, Adjustable voltage precision is 0.1V , you can see the working status of your device,No more fear of overvoltage damaging your equipment.
✔【Adjustable Voltage & Current】This DC Converter Input voltage Support AC 110V-120V or 220V-240V , Adjustable Volt Output Range 0-48V ; adjustable Amp output range 0-10A ;Power supply is suitable for 5V 9V 12V 24V 48V devices; Max current is 10A,Max output 480W.
✔【Smart Cooling System】The Cooling Fan are designed to activate only when the power supply is under sufficient load（internal temperature up to 113℉）, ensuring optimal cooling and improved energy consumption. Say goodbye to noisy and unnecessary fan operation!
✔【Safe and Reliable】This Power Supply Adapter Come with Overload , overvoltage protection / Leakage protection and short circuit protection function ; Compare with others , IMAYCC 48V Converter , power cord and plug all have passed UL / CE / RoHS Certifications.
✔【Wide Application】This power adapter can be used as a 5V 10V 12V 24V 48V power supply For RV ,Car ,industrial automation equipment, LED Strip Light, CCTV ,etc. All of our item has 12 Months long time warranty guarantee(replace or refund for any quality-related issuses)

SaleRank No. #13

DC Power Supply Variable, 30V 10A Bench Power Supply with Encoder Knob, 4-Digits Display, Adjustable Regulated lab Power Supply with 5V 3.6A USB & Type-C Quick-Charge, Output Switch

【High Precision Encoder Knob】Unlike ordinary potentiometer knobs, this DC power supply is equipped with a high precision encoder knob that has strong accuracy and stability. Pressing the knob to change the digits to the left, and rotating the knob to adjust the set voltage or current for each digit between 0-9. Make work more convenient and flexible!
【Output Switch Control】When using the DC power supply in experiments or work, the output button can prevent you from forgetting to turn off the output and causing damage to the load. Press the output button to turn on or off the output of the power supply. The status can be seen in the indicator light on the left side of the display, making it easier for you to use the bench power supply.
【Overcurrent Protection】The adjustable power supply has an OCP switch button, which allows you to select whether to turn on or off the OCP according to your work needs. When the OCP function is enabled, if the load device is short-circuited during operation, the adjustable power supply will automatically stop output and emit a buzzer to remind the user. Protect adjustable DC power supplies and loads from damage.
【4-Digit Display Screen】Variable power supply has 0-30V 0-10A high-definition display screen, which can simultaneously display three values of voltage, current, and automatically calculated power. It has constant voltage (C.V.) and constant current (C.C.) modes, which can be automatically switched. The indicator light of the working status can be seen on the display screen. The data is accurate to 0.01V and 0.001A. The high-definition digital display helps you operate as usual in the dark.
【Excellent After-sales Service】Providing high-quality products is our major commitment to our customers, and each product has been repeatedly tested. If you encounter any problems with the product you receive, you can always contact us. DIAIARY Benchtop Power Supply provides a 5-year warranty plan and online technical support.

Rank No. #14

DROK 48V Power Supply, AC 110V/220V to DC 0-48V 10A 480W Buck Converter, Adjustable Variable LED Adapter Regulated 5V 12V 24V 30V 36V 48V Volt Voltage Transformer 10A Amp Charger for Lab CCTV

【Volt Adjustment】 Input Voltage can be 110V or 220V. Wide adjustable output Voltage range: DC 0-48V. This supply is suitable for 5V 9V 12V 24V 30V 36V 48V devices. The voltage precision is 0.1V. Note——The maximum current is 10A. But the actual current is depended on the load. No matter how many voltage is adjusted, the current is 10A and can not be regulated. It can be used to device of 2A 3A 5A 10A. Make sure to use the devices which is below 10A.
【Hareware】 This Buck Converter is equipped with LED screen, heat sink and cooling fan. The LED screen can clearly display the output voltage. Heat sink and cooling fan can control the temperature in a safe range. During the running power is high, the cooling fan will automatically activate with little noise.
【Easy Operation】 This supply is no need to install, after connecting wire, it can be used to adjust output, which is convenient. The potentiometer is inset into the supply. Only to rotate the potentiometer can adjust output parameter.
【Protection】 Over Load Protection, Over Voltage Protection, Short Circuit Protection, which can protect your device from damage. Note: the default input voltage is 220V, before using, please switching the input voltage to 110V/220V according to your city voltage.
【Wide Application】 This power supply has variable application. It can be used as a 5V 12V 24V 30V 36V 48V power supply for RV, Car, Labtop, Computer, Lab, CCTV, etc. All of our item has 1 year long time warranty guarantee.

SaleRank No. #15

Universal 3V - 24V 1.5A 36W Adjustable DC Power Supply Adapter Speed Control Volt Display with Variable 8 Plugs and 1 Polarity Reverse Cable Cord

3-24V Multi voltage Adjustable and Display. Power supply for 3.5V 4V 4.5V 5V 5.5V 6V 8V 9V 10V 10.5V 11V 12V 12.5V 14V 15V 15.5V 17V 19V 20V 20.5V 21V 22V 24V. Used for current lower than 1.5A, such as 300mA, 400mA, 500mA, 800mA, 1A, 1.2A, 1.5A, ect.
AC Input: 100V - 120V ; DC Output :3V - 24V 1.5A max; 36W Max
Special Buit-in Power ON-OFF switch knot, more convenient and easy to control with this function.
Come with 8 different Plugs & 1 Polarity reverse cable. Tips size: LED Terminal Connector, Micro USB, 3.0x1.1mm, 2.5x0.7mm, 3.5x1.35mm, 4.0x1.7mm, 5.5x2.5mm, Mini USB.
All-in-1 Adapter - Fits 90% of AC/DC home appliances.(NOTE:!!! WON'T work on computer !!!.). such as LED strips, under-cabinet light, TV Box, smart speaks, wireless routers, essential oil diffuser humidifier, USB fan, Wifi camera, USB Hub, hard disk box, DC motor, DC pump, digital photo frame, DVR NVR surveillance system etc.

Rank No. #16

DC Power Supply Variable 0-30V 0-20A, Adjustable Switching Regulated DC Bench Power Supply, High Precision 4-Digit Multiple Protection

👍【Product Parameters】Input voltage: 110V 60Hz; Output Voltage: DC 0-32V Continuously Adjustable; Output current: DC 0-20A continuously adjustable; Display accuracy: +1%+1 word
👍【Excellent Performance】This DC power supply is a professional power supply regulation device, you can easily tune it within 0-32V and 0-20A. Very durable and easy to observe.
👍【Protection Functions】Safety is our priority, our product has have safety protections, adjustable overvoltage protection (OVP), short circuit current limiting protection (OCP), overtemperature protection (OTP), overpower protection (OPP).
👍【High Quality】High quality material adopted and make it more stable output, small volume, light weight, easy to carry and move and easy operation, greatly improving its working efficiency and lifespan.
👍【Application】Our product suitable for aging test of factory products; Battery Charging Industry; Inverter industry and LED manufacturing industry.

Rank No. #17

DC Power Supply Variable,0-30 V / 0-10 A LW-K3010D Adjustable Switching Regulated Power Supply Digital,with Alligator Leads US Power Cord Used for Spectrophotometer and lab Equipment Repair

◆【High Precision, Wide Range】LONGWEI DC power supply is a professional power supply regulation device that designed with crystal clear, backlit 3-digit LED display of voltage, current, and power. Precise accuracy: 00.1V and 0.01A. You can easily tune it within 0-30V and 0-10A. Very durable and easy to observe even in low light conditions.
◆【High Quality with Essential Safety】Safety is our priority. Grounding wire, The power supply takes the function of limited flow protection, overpower protection, over temperature protection, voltage overload protection. greatly improving its working efficiency and lifespan!
◆【Excellent Heat Dissipation】Equipped with a big fan controlled by intelligent temperature control sensor and multiple heat radiation grooves on both sides, Intelligent fan offers excellent heat dissipation effect, which reduces the noise and prolongs the life of product effectively.
◆【Various Application】This one weighs less than 2kgs and measures only 2.7*8.6*6.3inches, Applies for laboratory, school, home, electronic repair DIY, aging test and other requirements thanks to complete test probes and output cable with alligator clips.
◆【What You Get】1 x K3010D DC power supply, 1 x output power cord, 1 x Input power cord, 1 x test probes, 1 x User manual. (Buy Now Risk-Free with 30 days Free Of Return,we provide 12-Month after sale service, lifetime technical support. Please feel free to contact us if you have any concerns,we will reply to you to solve your problem in 24H.)

Rank No. #18

IKococater DC Power Supply Variable 120V 3A with Output Switch, Adjustable Regulated Switching Bench Power Supply with 4-Digits LED Power Display, 5V/2A USB Interface, Accurate Encoder Adjustment Knob

High Precision 4-Digit and Power Display: IKococater 120V 3A DC benchtop power supply is a professional power supply regulation device that has a high resolution of 0.1V and 0.001A. You can easily tune it within 0-120V and 0-3A. The backlit 4-digit LED display provides a more accurate readout for the voltage and current value, visible easily even in the low-light conditions.
Set Values by Accurate Encoder Knob: Just "set" Voltage and Current instead of "adjust". You can press the Voltage and Current encoder knob to select the Digit you want to adjust, then rotate the knob to set the value from 0-9. Each Digit can be set easily by the accurate encoder knob. The encoder switch replaces the potentiometer switch, making your work easier, more accurate and efficient.
Output Switch Control - Sometimes we need to switch between different voltage or current outputs, but we often forget to unplug the previous instrument and cause to burn out, which often occurs in the maintenance. Output switch is designed to solve this problem. By pressing the OUTPUT key, the required voltage and current can be adjusted without the actual output power, which makes this benchtop DC power supply more secure and more energy saving.
Compact and Various Application: IKococater DC power supply is less than 3 lb and measures only 9.5 x 3.4 x 6.1 inches, applies for laboratory, school, repair, electrolyzation, electroplate, brush plating, lamp test, aging testing, battery charge, home DIY and other requirements. 5V/2A USB Interface could charge your cellphone and provide power for the device which you want to repair, no worry about running out of power.
Reliable and Safety: Many safety measures are adopt in IKococater DC power supply-Leakage protection, Thermal protection, Overload protection and Short-circuit protection. This power supply use premium electronic components, provide reliable working status, and prolong the life of the product effectively. When the working temperature is more than 122℉/50℃, the intelligent thermal protection will active the cooling fan to lower the temperature.

Rank No. #19

DC Power Supply Variable, 30V 10A Bench Power Supply with Encoder Adjustment Knob, Output Enable/Disable Button, Adjustable Power Supply with USB Quick-Charge, Short Circuit Alam

【High-precision Encoder Knob】Different from general knobs, this DC power supply has a precise encoder knob. You can press the knob to switch each digit, and then turn the knob to customize each digit in the range of 0-9. Set the voltage or current you want more accurately. Make your work more flexible and efficient.
【Output Enable/Disable Button】In the process of using the bench power supply, Output button can prevent us from forgetting to turn off the output and causing damage to the load. Just press this button to turn on or turn off the output of the power supply. This makes it more convenient for you to use the variable power supply.
【Overcurrent Protection】When the OCP function is turned on, if the load equipment is short-circuited during operation, the adjustable power supply will automatically stop output and send a buzzer to alert the user. Protect the adjustable power supply and load from damage.
【Precise 4-digit LED Display】The dc power supply is equipped with a high-definition 4-digit display with data accurate to 0.01V and 0.001A. It has constant voltage (C.V.) and constant current (C.C.) modes, which can be switched automatically. You can see the working status indicator on the display. Additionally, you can adjust the brightness of the screen according to your needs.
【USB Fast Charging Port】The variable power supply is configured with an 18W fast charging port. No more mplaining about mobile phones or repaired devices not being charged in time. The NANKADF dc power supply allows you to avoid this dilemma. It charges your devices quickly anytime, anywhere.

Rank No. #20

Eventek DC Power Supply, 120V/3A Variable Power Supply with Encoder Adjustment Knob, Memory Switching Bench Power Supply with 4-Digits LED Display, 5V/3.6A USB Output & Banana Plug Lead

🔥【2023 Upgrade Model Programming DC Power Supply】 DC power supply has precision encoder adjustment buttons. Simply press the knob to toggle each digit, then turn the knob to set each digit in the 0-9 range. Unlike normal knobs, the encoder knob helps you set the desired value more accurately. The power supply also has a built-in 5 V/3.6A USB port for quick charging of cell phones or other devices or for charging device maintenance.
💡【High Precision Power Display】Adjustable DC power supply provides 0-120V and 0-3A power output with constant voltage (C.V.) and constant current (C.C.) modes with automatic conversion and display accuracy up to 0.01V and 0.001a, which can automatically calculate power values based on voltage and current. In addition, the backlit 4-digit LED display provides more accurate readings of voltage and current values that are easy to see even in low-light conditions.
👍【M1-M3 Memory Storage + Output Button】Bench power supply with three sets of data storage function button M1-M3. you can save three sets of commonly used voltage and current value combinations and recall it for use at any time without repeated input. This helps improve efficiency. The built-in output on/off button allows you to set voltage and current without power supply. It prevents you from damaging the device by forgetting to disconnect the output.
💎【Reliable & Safe Design】The DC power supply is made of high quality electronic components and is FCC/CE certified to provide reliable and stable performance and effectively extend product life.When a short circuit occurs, a buzzer alarm will sound and the output will be stopped to protect the bench power supply from damage. Intelligent safety system provides multiple protection including overheat protection, voltage overload protection, short circuit protection, etc.
✅【Professional Customer Support】Providing powerful and high quality products is our aim, from R&D to production, we go through many tests and checks to make sure you get high quality products. We also provide two-year warranty and 24-hour customer support, if you encounter problems with the use of the product, you can contact us at any time.

Last update on 2023-08-21 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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FAQ:

Q: What is 12 volt DC power?

A: A 12V socket is a cylindrical receptacle that provides direct current (DC) at 12 volts to a device plugged into it. The most commonly known 12V sockets are found in automobiles, and were originally provided as part of a system that heated a metal coil in a heat-proof holder to light cigars and cigarettes.

Q: What is a variable power supply?

A: A variable power supply is a regulator that electricians and electrical project hobbyists use to test the capacity of voltage for any project they may have completed. The power supply is used as a gauge to make sure the piece of work the person has completed is able to withstand certain amounts…

Q: What is a variable power source?

A: A variable power supply is a useful tool for anyone who has a background with electrical circuitry and components. It also has many uses other than just testing. In addition to being used to test circuits, this type of power supply may be used by miniature hobbyists as well.

Q: What is a fixed power supply?

A: A fixed output power supply has, well, a fixed output voltage. This means that when the power supply is plugged in and the output is on, the output voltage is a single voltage that is not expected to change – it is fixed at that voltage. These power supplies are typically used to provide simple bias for a circuit.