The invention relates to a fan, in particular for an aircraft cooling unit, comprising a wheel (128) and a shaft line (136) for driving the wheel about an axis (A), said wheel including a hub (138) supporting an annular row of blades (140), and means (142) for connection to said shaft line that are housed inside said hub. The fan is characterized in that the connection means include at least one meltable safety element (158) designed to be broken and to rotationally disengage at least a portion of the connection means from the shaft line when a torque for driving the wheel that is transmitted by the shaft line exceeds a specific threshold.