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Comparison · Power supplies

12 V 300 W power supply or MeanWell SP-320-5

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: MeanWell SP-320-5 (65 A vs. 26); No load: 12 V 300 W power supply (0.9 W vs. 8); Temperature rise: MeanWell SP-320-5 (75 °C vs. 83).

Model12 V 300 W power supply12 V 300 W power supply2025Read review →MeanWell SP-320-5MeanWell SP-320-52020Read review →
Power, W300275
Test current, A2665
Under load, V10.654.982
No load, W0.98
Temperature rise, °C8375
Review conclusionNot recommendedRecommended

Only in one review: Voltage 12 V (12 V 300 W power supply); Current 55 A (MeanWell SP-320-5); Ripple 130 mV (12 V 300 W power supply); Efficiency 80 % (MeanWell SP-320-5); Power factor 0.97 (MeanWell SP-320-5); Protection 28 A (12 V 300 W power supply); Weight 1100 g (12 V 300 W power supply).

12 V 300 W power supply: The claimed 300 W is not borne out: it is effectively a 200–250 W supply that enters protection when overheated.

MeanWell SP-320-5: The used unit performed excellently, including overload testing at 65 A and a low-ripple result.

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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