Specifications Model FSP650-51AAC Rated Output Power 550W Form Factor ATX 80 PLUS Certification 230V EU Standard Input Voltage 200-240V Input Current 4A Input Frequency 50-60Hz PFC Active PFC Efficiency 85% Fan Type Sleeve Fan, 120mm Dimensions(L x W x H) 150 x 140 x 86mm Operation Temp. 100,000 Hrs Protection OCP, OVP, OPP, SCP The HV PRO series complies features custom DC-DC design provides safety and power efficiency. With an 230V 80 Plus™ rating, both models deliver over 85% high efficiency and low noise levels thanks to its thermal control fan design, where a large 120mm fan takes care of cooling duties when required, making it excellent for situations that are sensitive to size and noise. Complies with ATX12 v2.52 & EPS12 v2.92 Efficiency 85% @ typical Load Active PFC ≧ 0.9 Hold up time > 17ms @80% Load +12V Single-Rail Design +5V &3.3V DC to DC Module Design 120mm Silent & long life Fan Complete Protections: OCP/OVP/OPP/SCP