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Comparison · Power supplies

12 V 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. 50); Temperature rise: 12 V 120 W power supply (66.5 °C vs. 92).

Model12 V 120 W power supply12 V 120 W power supply2025Read review →PTA-120W-12VPTA-120W-12V2025Read review →
Voltage, V1212
Power, W120120
Ripple, mV5040
Temperature rise, °C66.592
Review conclusionWith reservationsWith reservations

Only in one review: Current 10 A (12 V 120 W power supply); Efficiency 81 % (PTA-120W-12V); No load 0.5 W (12 V 120 W power supply).

12 V 120 W power supply: Low ripple, but in reality it is a 100–110 W unit rather than a full 120 W supply.

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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