This product is either discontinued or we cannot get that from suppliers.
Cooler Master MPY-5501-AFAAG-AU, Efficiency 90% Typically, MTBF >100,000 hours, Protections OVP / OPP / UVP / SCP / OTP, Active PFC, Input 100-240V, Input Current 6.3A, Input Frequency 50-60Hz, Fan size 120mm, Hold Up Time > 14 ms @ 100% load, Efficiency 90% Typically.
The Cooler Master MPY-5501-AFAAG-AU MWE 550W 80 Plus Gold Modular ATX Power Supply features a fully modular build that delivers consistent 90% efficiency, low temperatures, and quiet operation when doing work.