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Comparison · Power supplies

12 V 120 W power supply or UM-U120S

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: Ripple: 12 V 120 W power supply (50 mV vs. 220); No load: 12 V 120 W power supply (0.5 W vs. 1.2); Temperature rise: 12 V 120 W power supply (66.5 °C vs. 100).

Model12 V 120 W power supply12 V 120 W power supply2025Read review →UM-U120SUM-U120S2021Read review →
Voltage, V1212
Current, A1010
Power, W120120
Ripple, mV50220
No load, W0.51.2
Temperature rise, °C66.5100
Review conclusionWith reservationsWith reservations

Only in one review: Efficiency 85 % (UM-U120S); Price 11.99 $ (UM-U120S).

12 V 120 W power supply: Low ripple, but in reality it is a 100–110 W unit rather than a full 120 W supply.

UM-U120S: Overall, the power supply is decent, but needs cooling for sustained operation at its rated 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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