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

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.