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Comparison · Power supplies

120 W power supply or PTA-120W-12V

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: PTA-120W-12V (40 mV vs. 400); Temperature rise: 120 W power supply (84 °C vs. 92).

Model120 W power supply120 W power supply2025Read review →PTA-120W-12VPTA-120W-12V2025Read review →
Power, W120120
Ripple, mV40040
Temperature rise, °C8492
Review conclusionWith reservationsWith reservations

Only in one review: Voltage 12 V (PTA-120W-12V); Current 10 A (120 W power supply); Efficiency 81 % (PTA-120W-12V).

120 W power supply: A decent 80–85 W supply, but it does not deliver the claimed 120 W; ripple is higher without an output choke.

PTA-120W-12V: A budget PSU with good high-frequency ripple and power headroom, but noticeable low-frequency ripple.

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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