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Comparison · Power supplies

36 W, 12 V 3 A power supply or 12 V 40 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 40 W power supply (3.4 A vs. 2.5); Ripple: 36 W, 12 V 3 A power supply (600 mV vs. 650); No load: 12 V 40 W power supply (0.1 W vs. 0.5); Temperature rise: 12 V 40 W power supply (60 °C vs. 138).

Model36 W, 12 V 3 A power supply36 W, 12 V 3 A power supply2026Read review →12 V 40 W power supply12 V 40 W power supply2025Read review →
Current, A33.33
Power, W3640
Test current, A2.53.4
Ripple, mV600650
No load, W0.50.1
Temperature rise, °C13860
Review conclusionWith reservationsRecommended

Only in one review: Voltage 12 V (36 W, 12 V 3 A power supply); Efficiency 84 % (12 V 40 W power supply); Protection 3.7 A (36 W, 12 V 3 A power supply).

36 W, 12 V 3 A power supply: Works for low-power, undemanding loads, but the author says he would not buy it himself.

12 V 40 W power supply: A decent supply with closely set protection, suitable for LED strips; ripple is high for sensitive devices.

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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