Comparison · Power supplies

12 V 36 W power supply or 12 V 3 A 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: Ripple: 12 V 3 A power supply (10 mV vs. 600).

Model	12 V 36 W power supply2025Read review →	12 V 3 A power supply2017Read review →
Voltage, V	12	12
Power, W	36	36
Test current, A	3	3
Ripple, mV	600	10
Review conclusion	With reservations	Not recommended

Only in one review: Current 3 A (12 V 3 A power supply); In test 35.5 W (12 V 3 A power supply); Under load 11.69 V (12 V 36 W power supply); Efficiency 77 % (12 V 3 A power supply); No load 2.4 W (12 V 3 A power supply); Protection 3.4 A (12 V 36 W power supply); Temperature rise 132 °C (12 V 3 A power supply).

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

12 V 3 A power supply: Above 2 A, the supply overheats and behaves erratically; it is unsuitable for continuous use.

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.