The 6318/2TDH4P is a 48VDC Axial Fan with a ball bearing and glass-fiber reinforced PA plastic impeller. This high performance DC fan features die-cast aluminum housing, electrical connection is via TR 64 18/20/22AWG speed signal and control input cable. The motor is protected against reverse polarity and blocked rotor. The rotational direction is counter clock wise direction looking towards rotor and the air exhaust over struts. 3-phase fan drive with very smooth operation and high efficiency housing with grounding lug for M4 x 8 screw (Torx) power consumption when wide open; these values may be considerably higher at the operating point.