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Comparison · Power supplies

QS-72-12 or 12 V 75 W 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: 12 V 75 W power supply (7.5 A vs. 7); Ripple: 12 V 75 W power supply (170 mV vs. 200); Efficiency: QS-72-12 (87 % vs. 85.5); No load: 12 V 75 W power supply (0.1 W vs. 0.5); Temperature rise: 12 V 75 W power supply (68 °C vs. 130).

ModelQS-72-12QS-72-122026Read review →12 V 75 W power supply12 V 75 W power supply2025Read review →
Voltage, V1212
Power, W7275
Test current, A77.5
Ripple, mV200170
Efficiency, %8785.5
No load, W0.50.1
Protection, A8.58
Temperature rise, °C13068
Review conclusionWith reservationsNot recommended

Only in one review: Current 6 A (QS-72-12); Under load 11.31 V (QS-72-12).

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

12 V 75 W power supply: It is the same 60 W supply: temperature is too high at the claimed 75 W, and protection is set much too high.

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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