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Comparison · Power supplies

19 V 3.42 A power supply or UM-U120S, 12 volts 10 amps

Two models side by side: measurements taken by the author in their reviews, and their conclusions. The better value in each row is highlighted.

In brief: Based on review measurements: Test current: UM-U120S, 12 volts 10 amps (10.5 A vs. 5.4); Ripple: UM-U120S, 12 volts 10 amps (220 mV vs. 300); No load: UM-U120S, 12 volts 10 amps (1.2 W vs. 2.2); Temperature rise: UM-U120S, 12 volts 10 amps (100 °C vs. 130).

Model19 V 3.42 A power supply19 V 3.42 A power supply2022Read review →UM-U120S, 12 volts 10 ampsUM-U120S, 12 volts 10 amps2021Read review →
Test current, A5.410.5
Ripple, mV300220
No load, W2.21.2
Protection, A5.412.5
Temperature rise, °C130100
Review conclusionWith reservationsWith reservations

Only in one review: Voltage 12 V (UM-U120S, 12 volts 10 amps); Current 10 A (UM-U120S, 12 volts 10 amps); Power 120 W (UM-U120S, 12 volts 10 amps); Efficiency 85 % (UM-U120S, 12 volts 10 amps); Price 11.99 $ (UM-U120S, 12 volts 10 amps).

19 V 3.42 A power supply: The cheap PSU works, but has high ripple, heat, and weak protection; the author modified it for lighter loads.

UM-U120S, 12 volts 10 amps: Overall, the supply is decent, but needs cooling for sustained operation at full power.

Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.

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