Comparison · Power supplies

5 V 20 A power supply (100 W) or 24 V 100 W transformer

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 20 A power supply (100 W) (24 A vs. 2); Temperature rise: 24 V 100 W transformer (55 °C vs. 135).

Model	5 V 20 A power supply (100 W)2026Read review →	24 V 100 W transformer2016Read review →
Voltage, V	5	24
Current, A	20	4
Power, W	100	100
Test current, A	24	2
Temperature rise, °C	135	55
Review conclusion	With reservations	Recommended

Only in one review: In test 100 W (24 V 100 W transformer); Under load 4.93 V (5 V 20 A power supply (100 W)); Ripple 100 mV (5 V 20 A power supply (100 W)); Efficiency 72 % (5 V 20 A power supply (100 W)); Protection 24 A (5 V 20 A power supply (100 W)); Price 13 $ (24 V 100 W transformer).

5 V 20 A power supply (100 W): Well assembled, but effectively a 75 W unit; the output inductor overheats at full power.

24 V 100 W transformer: The transformer works normally and reaches at most 52–55°C at full power.

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.