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Comparison · Power supplies

PTA-120W-12V or 48 V 2.5 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: Test current: PTA-120W-12V (11 A vs. 3.03); Ripple: 48 V 2.5 A power supply (20 mV vs. 40); Efficiency: 48 V 2.5 A power supply (88.8 % vs. 81); Temperature rise: PTA-120W-12V (92 °C vs. 100).

ModelPTA-120W-12VPTA-120W-12V2025Read review →48 V 2.5 A power supply48 V 2.5 A power supply100MHz · 2018Read review →
Voltage, V1248
Power, W120125
Test current, A113.03
Ripple, mV4020
Efficiency, %8188.8
Temperature rise, °C92100
Review conclusionWith reservationsRecommended

Only in one review: Current 2.5 A (48 V 2.5 A power supply); In test 150 W (48 V 2.5 A power supply); Weight 230 g (48 V 2.5 A power supply); Price 4.69 $ (48 V 2.5 A power supply).

PTA-120W-12V: A decent budget supply for undemanding uses, but it has high low-frequency ripple and low input capacitance.

48 V 2.5 A power supply: This inexpensive power supply is well built, delivers its rated power steadily, and the author recommends it.

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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