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Comparison · Power supplies

UM-U120S or MeanWell SDR-120-24

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: Efficiency: MeanWell SDR-120-24 (89 % vs. 85); Temperature rise: MeanWell SDR-120-24 (81.6 °C vs. 100).

ModelUM-U120SUM-U120S2021Read review →MeanWell SDR-120-24MeanWell SDR-120-242018Read review →
Voltage, V1224
Power, W120120
Efficiency, %8589
Temperature rise, °C10081.6
Review conclusionWith reservationsRecommended

Only in one review: Current 10 A (UM-U120S); In test 180 W (MeanWell SDR-120-24); Ripple 220 mV (UM-U120S); No load 1.2 W (UM-U120S); Price 11.99 $ (UM-U120S).

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

MeanWell SDR-120-24: The PSU passed the tests; the author praised its build and protections but noted that the transformer runs quite hot.

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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