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DC Power Supply Variable, Bench Power Supply with Encoder Adjustment Knob, Output Enable/Disable Button, Adjustable Power Supplies with USB Quick-Charge, Short Circuit Alam (30V 5A Black)
NANKADF

NANKADF DC Power Supply Variable

Bottom line: The NANKADF DC Power Supply Variable ($45.99 on Amazon as of 2026-10-07): Encoder knob steps digit-by-digit for exact 30V/5A setpoints; main trade-off: capped at 30V 5A, too small for higher-draw bench work.

$45.99

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Buy on Amazon — $45.99 Compare to similar power supplies

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Encoder knob steps digit-by-digit for exact 30V/5A setpoints
  • ✓ 4-digit LED resolves to 0.01V and 0.001A
  • ✓ Output enable/disable button prevents live-load surprises
  • ✓ OCP cuts output and buzzes on a short circuit
  • ✓ 18W USB quick-charge port doubles as a phone charger

Cons

  • ✗ Capped at 30V 5A, too small for higher-draw bench work
  • ✗ Single output channel, no dual or tracking rails
  • ✗ Digit-by-digit knob entry is slower than a numeric keypad
  • ✗ No stated calibration or accuracy spec beyond display resolution

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SpecPicks Verdict

SpecPicks scored NANKADF DC Power Supply Variable using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. NANKADF's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • 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.
  • 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 0.01 V and 0.001 A. 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.

Full Specifications

BrandNANKADF
Wattage100 watts
Form Factorcompact
ConnectivityUSB
Model Number30V 5A BLACK
CompatibilitySwitch
Built-In MediaDC POWER SUPPLY，Output cable, power cord, manual
Connector Typeusb
Cooling MethodAir
Output Wattage300
Item Dimensions7.87 x 3.54 x 5.71 inches
Mfr Part NumberNWPS
Compatible DevicesPersonal Computer
Warranty Description1
Maximum Input Voltage115 volts
Minimum Input Voltage115 volts
Item dimensions L x W x H7.87 x 3.54 x 5.71 inches
Connector Type Used on Cableusb
Full listing titleDC Power Supply Variable, Bench Power Supply with Encoder Adjustment Knob, Output Enable/Disable Button, Adjustable Power Supplies with USB Quick-Charge, Short Circuit Alam (30V 5A Black)

Ready to buy?

DC Power Supply Variable, Bench Power Supply with Encoder Adjustment Knob, Output Enable/Disable Button, Adjustable Power Supplies with USB Quick-Charge, Short Circuit Alam (30V 5A Black) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $45.99

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

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DC Power Supply Variable, Bench Power Supply with Encoder Adjustment Knob, Output Enable/Disable Button, Adjustable Power Supplies with USB Quick-Charge, Short Circuit Alam (30V 5A Black)
$45.99
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