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Comparison · Power supplies

PTA-120W-12V or 19 V 3.42 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. 5.4); Ripple: PTA-120W-12V (40 mV vs. 300); Temperature rise: PTA-120W-12V (92 °C vs. 130).

ModelPTA-120W-12VPTA-120W-12V2025Read review →19 V 3.42 A power supply19 V 3.42 A power supply2022Read review →
Test current, A115.4
Ripple, mV40300
Temperature rise, °C92130
Review conclusionWith reservationsWith reservations

Only in one review: Voltage 12 V (PTA-120W-12V); Power 120 W (PTA-120W-12V); Efficiency 81 % (PTA-120W-12V); No load 2.2 W (19 V 3.42 A power supply); Protection 5.4 A (19 V 3.42 A power supply).

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

19 V 3.42 A power supply: The cheap PSU works, but has high ripple, heat, and weak protection; the author modified it for lighter loads.

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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