External rotor fan FJ4E-250

General Specification: Allowable Ambient Temperature Range: -30 +85 Centigrade degree (Under unconcretionary) Dielectric withstanding voltage: AC 1800V at 0.5mA, 50/60HZInsultaion Isolation Grade: F Protection Grade: IP 55Unit Weight: 1.6Kg Material: Fixed guard: Steel wire is finished with black oven backed painting and anti-corrosion treatment.Impeller: pressed from metal armor plate, impellers are welded to motor rotor and its surface is anti-corrosion, finished by electrophoresis at black cathode. Bearing Type: Maintain-free NSK ball bearing.Power Supply Connection: Wire connection or terminal box set. Contact with us for more details of specification.