DELTA Delta AUB0524VHD 5020 50mm 5CM DC 24V 0.15A the Server inverter PC Case Cooling fan

Model AUB0524VHDSize 50*50*20mmBearing ball bearingStandard voltage 24vCurrent 0.15AThread: 2 lines (see pictures below)Cord length:8 cmMaintain an optimal running time life of 80,000 hours: 8.0000 hours (25 °, 45~85% relative humidity of the environment)Fan frame: injection molding, glass fiber +VO PBT+30% grade flame retardant;Blades: injection molding, glass fiber +VO PBT+30% grade flame retardant;Fan rotation direction: from the fan blade direction to counterclockwise;Operating temperature:-10 c to + 70 degrees Celsius;Storage temperature:-40 degrees Celsius to + 70 degrees Celsius;Bearings: high-precision ball bearings;Power range: rated power supply plus or minus 15%;Insulation resistance: more than 500 mohm;Withstanding voltage: sink drain current 0.5mA 500V/1 minutes;Operating life time: when the ambient temperature is 25 degree 80,000 hoursDouble ball bearing (2 Ball Bearing) are high-grade bearings, take the m of rolling friction, uses two ball bearings, bearing several tiny steel balls around the axis, when a fan page or axis of rotation, steel ball that is turning. Because it is a sphere, so the less friction, and there is no oil leakage problem. Double ball bearing the advantages of long life, approximately 50,000-100,000 hours; good aging resistance, suitable transfer v high speed fan. Double ball bearing disadvantage is the high manufacturing cost, and at the same RPM noise level Max. Double ball of wind and hydraulic bearings better, especially double ball bearings. Double ball bearing embedded in fans as a whole, moving parts do not have direct contact with the outside world. In a sealed environment, the working environment is relatively stable.Feature maintenance- ball bearings, double, long service life, adequate cooling air flow and air pressure.