ADDA48v fan AD17251General Specification Electric Strength: 5mA max at 1500VAC for 1 min between lead wire and frame Insulation Resistance: 10M ohm between lead wire and frame(DC 500V) Life Expectancy(Ball bearing): 50000hrs min at 40 degree C/L10 relative humidity 65%+/-20% Life Expectancy(Hypro bearing): >40000hrs min at 40 degree C/L10 relative humidity 65%+/-20% Life Expectancy(Fluid Dynamic bearing): >60000hrs min at 40 degree C/L10 relative humidity 65%+/-20% Operation Temperature: -10 75 degree C(+14 167 degree F),normal; -10 90 degree C(+14 194 degree F), specification Storage Temperature: -40 75 degree C(-40 167 degree F) Protection: Motor protection and polarity protection Lead wire: UL1571 AWG28,30; UL1007 AWG24,26; UL1061 AWG26 Plastic Material: Black PBT (UL94V-0) glass fiber ADDA48v fan AD17251detailed specification: 1. frame size(mm): 172X150X51 2. bearing system type:ball bearing 3. rated voltage:12V,24V, 48V 4. rated speed: 3500 5300RPM 5. maxiam air flow: 417CFM 6. maxiam pressure: 43mmAq 7. maxiam noise: 66dBA 8. function: by IC,by IC with RD, by IC with FG,PWM+FG 9. safety approvals: CE,UL,cUL,TUV