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Comparison · Power supplies

QS-72-12 or 24 Volt 3 Amp power supply

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: QS-72-12 (7 A vs. 3.39); Ripple: 24 Volt 3 Amp power supply (50 mV vs. 200); Efficiency: QS-72-12 (87 % vs. 86.4); No load: QS-72-12 (0.5 W vs. 1.4); Temperature rise: 24 Volt 3 Amp power supply (85 °C vs. 130).

ModelQS-72-12QS-72-122026Read review →24 Volt 3 Amp power supply24 Volt 3 Amp power supply2018Read review →
Voltage, V1224
Current, A63
Power, W7272
Test current, A73.39
Under load, V11.3117.7
Ripple, mV20050
Efficiency, %8786.4
No load, W0.51.4
Protection, A8.53.39
Temperature rise, °C13085
Review conclusionWith reservationsWith reservations

Only in one review: In test 66.5 W (24 Volt 3 Amp power supply).

QS-72-12: Fairly decent, but 6 A causes overheating; the author sees about 4.5–5 A as the practical limit.

24 Volt 3 Amp power supply: The supply is well built and protected, but its ratings are overstated; continuous power is about 50 W.

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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