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Comparison · Power supplies

12 V 40 W power supply or 12 V 36 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. 3); Ripple: 12 V 36 W power supply (600 mV vs. 650).

Model12 V 40 W power supply12 V 40 W power supply2025Read review →12 V 36 W power supply12 V 36 W power supply2025Read review →
Power, W4036
Test current, A3.43
Ripple, mV650600
Review conclusionRecommendedWith reservations

Only in one review: Voltage 12 V (12 V 36 W power supply); Current 3.33 A (12 V 40 W power supply); Under load 11.69 V (12 V 36 W power supply); Efficiency 84 % (12 V 40 W power supply); No load 0.1 W (12 V 40 W power supply); Protection 3.4 A (12 V 36 W power supply); Temperature rise 60 °C (12 V 40 W power supply).

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

12 V 36 W power supply: It handles rated power well, but output capacitance is low and high-frequency ripple is elevated.

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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