ebm-papst High Performance Reduced Noise DC Fans - 4300N Series. The ebm-papst high-performance fan offers reduced operating noise thanks to a new aero-acoustic design. Fan operation is made easier with PWM and tachometer output model options. Manufacturer part number suffix: 'U' denotes IP68 protected, "R" denotes humidity protected. Features and Benefits. Superior efficiency Lower noise levels Reduced power consumption Similar air flow running at a lower speed