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Rectangular ATX power supply unit with metal casing and cooling fan grille

KHACHIMO

KHACHIMO PSU for FSP DC 48V 400W FSP400-60DL power supply

SKU CH-WZ5H-QBBMA

48V DC 400W ATX power supply with 80 PLUS Gold efficiency, zero RPM fan mode and Modern Standby support for quiet, efficient operation

  • TypeATX
  • Modern Standby support for near-instant wake from sleep
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode keeps system silent at low load
  • Resonant LLC with DC-to-DC conversion delivers stable, clean power
  • ATX form factor fits standard desktop builds

ATX power supply for 48 V DC systems

This ATX form-factor unit delivers 400 W from a 48 V DC source, making it suitable for specialised servers, industrial chassis or custom builds that run on DC distribution. The 80 PLUS Gold certification confirms high efficiency across the load range, reducing waste heat and operating cost. Modern Standby compatibility enables extremely fast wake-from-sleep transitions and improved low-load efficiency. Builders needing a standard AC-input PSU or a different DC voltage should look elsewhere.

Integration into a DC-powered build

The supply accepts a 48 V DC feed and converts it via resonant LLC topology with DC-to-DC conversion, producing clean, consistent rails while minimising coil whine. Its ATX footprint fits standard mounting points, and the Zero RPM fan mode keeps the system near-silent at low and medium loads by stopping the fan entirely. No AC mains cable or AC-side components are required, freeing up space and simplifying wiring in DC-centric enclosures.

Features that change daily operation

Modern Standby support cuts wake latency and improves efficiency during sleep states, which matters for always-on edge nodes or workstations that cycle frequently. The Zero RPM mode eliminates fan noise during light workloads, and the resonant LLC plus DC-to-DC design reduces audible coil whine while maintaining tight voltage regulation. These traits combine to deliver quieter, cooler operation without extra configuration.

Punti di forza

  • Modern Standby support for near-instant wake from sleep
  • 80 PLUS Gold efficiency cuts power draw and heat
  • Zero RPM fan mode keeps system silent at low load
  • Resonant LLC with DC-to-DC conversion delivers stable, clean power
  • ATX form factor fits standard desktop builds

Caratteristiche tecniche

TypeATX

Domande su questo articolo

At what sustained load does the 400 W 48 V output hit its limit?

The unit delivers a continuous 400 W at 48 V, so the limit is reached when the connected system draws the full rated power.

How does the fan behave and what heat or noise should I expect during all-day operation?

Zero RPM mode stops the fan completely at low and medium loads for silent running; 80 PLUS Gold efficiency keeps waste heat and noise low even under sustained use.

What existing hardware must I already have for this supply to work?

An ATX-compatible motherboard and case are required; the PSU uses standard ATX connectors and form factor.

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