Seasonic Focus Plus Gold 850 PSU Review

Protection Features

Check out our PSUs 101 article to learn more about PSU protection features. Our protection features evaluation methodology is described in detail?here.

Protection Features
OCP12V: -
5V: 26.7A (133.5%)
3.3V: 27.3A (136.5%)
5VSB: 5.4A (180%)
OPP1168.46W (137.47%)
OTP? (120-130°C @ secondary side)
SCP12V: ?
5V: ?
3.3V: ?
5VSB: ?
-12V: ?
PWR_OKOperates properly
NLO?
SIPSurge: MOV
Inrush: NTC thermistor & bypass relay

Over-current protection on the minor rails is set to normal levels, while it's quite high on the 5VSB rail. Not to worry, though: the PSU's corresponding circuit handles the increased load without a problem.

The OPP's triggering level is also quite high, at almost 137.5%. We think it should be set lower, to roughly 130% of the PSU's maximum-rated capacity.

Seasonic does enable over-temperature protection, a feature that every power supply should have. It'll save the PSU in case of a fan failure, for instance.

Lastly, the power-good signal is accurate, since it drops before the rails go out of spec.

MORE: Best Power Supplies

MORE: How We Test Power Supplies

MORE: All Power Supply Content

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