Comparison · Power supplies

5 V 40 A power supply (200 W), passive cooling or S-180-12

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: 5 V 40 A power supply (200 W), passive cooling (43.5 A vs. 14); Ripple: 5 V 40 A power supply (200 W), passive cooling (170 mV vs. 650).

Model	5 V 40 A power supply (200 W), passive cooling2026Read review →	S-180-122015Read review →
Voltage, V	5	12
Current, A	40	15
Power, W	200	180
Test current, A	43.5	14
Under load, V	4.99	11.8
Ripple, mV	170	650
Review conclusion	Not recommended	With reservations

Only in one review: Efficiency 80 % (5 V 40 A power supply (200 W), passive cooling); Protection 43.5 A (5 V 40 A power supply (200 W), passive cooling); Temperature rise 135 °C (5 V 40 A power supply (200 W), passive cooling).

5 V 40 A power supply (200 W), passive cooling: Cannot sustain its rated 200 W: major components overheat at full load, and ripple is high.

S-180-12: Well built, but overheats at maximum current and has high ripple; safer to use at up to 12 A.

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.