Comparison · Power supplies

100 W power supply, 12 V 8.3 A, metal case or 48 V, 2.1 A, 100 W (track)

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: 100 W power supply, 12 V 8.3 A, metal case (100 mV vs. 800); Efficiency: 48 V, 2.1 A, 100 W (track) (87 % vs. 84); No load: 48 V, 2.1 A, 100 W (track) (0.2 W vs. 0.5); Temperature rise: 48 V, 2.1 A, 100 W (track) (58 °C vs. 103).

Model	100 W power supply, 12 V 8.3 A, metal case2026Read review →	48 V, 2.1 A, 100 W (track)2026Read review →
Voltage, V	12	48
Current, A	8.3	2.1
Power, W	100	100
Ripple, mV	100	800
Efficiency, %	84	87
No load, W	0.5	0.2
Temperature rise, °C	103	58
Review conclusion	With reservations	With reservations

100 W power supply, 12 V 8.3 A, metal case: A budget supply with low high-frequency ripple, but noticeable low-frequency spikes and a hot transformer at full load.

48 V, 2.1 A, 100 W (track): A compact supply with honest output and low heating, but its protection trip current is much too high.

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.