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Comparison · Power supplies

Sanmim GPA40B or Dual-voltage 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: In test: Sanmim GPA40B (70 W vs. 47); Test current: Sanmim GPA40B (5.7 A vs. 2.838); Temperature rise: Dual-voltage power supply (84 °C vs. 93).

ModelSanmim GPA40BSanmim GPA40B2020Read review →Dual-voltage power supplyDual-voltage power supply2015Read review →
In test, W7047
Test current, A5.72.838
Under load, V12.08314.6
Temperature rise, °C9384
Review conclusionRecommendedWith reservations

Only in one review: Voltage 12 V (Sanmim GPA40B); Current 3.5 A (Sanmim GPA40B); Power 40 W (Sanmim GPA40B); Ripple 37 mV (Sanmim GPA40B); Efficiency 87 % (Sanmim GPA40B); No load 0.3 W (Sanmim GPA40B); Protection 5.7 A (Sanmim GPA40B).

Sanmim GPA40B: It regulates voltage excellently and handles a sustained 150% load, though it costs more than budget models.

Dual-voltage power supply: The PSU works, but its output voltages vary greatly; the author notes the missing inductor on the 12 V channel.

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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