3212J/2N-301 DC Axial Fan 38mm axial fan with extremely pressure resistant performance curve. Designed for dense and demanding electronics cooling. Drive electronics is completely integrated into the fan. Fan speed and noise can be changed by varying the supply voltage. General Data Features Voltage range V DC 7 13,8 Electronic locked rotor protection, Nominal voltage V DC 12 overload protection is integrated into -1 the fan circuit. Nominal speed min 6000 3 Electronic reverse polarity protection. Max. flow rate m /h 130 Fan starts only with correct polarity. Max. flow rate CFM 76,5 Electrical connection via 2 leads AWG24, 310mm long. Noise free air dB(A) 51 Open collector tacho signal Current consumption mA 630 Power consumption W 7,5 Patents granted or applied for. Permanent ambient temperature C -20 ... +70 at max. voltage Service life (70 C) h 35.000 Service life (40 C) h 70.000 Approvals UL, CSA, VDE Fan housing / impeller PBTP / PA 6.6 Bearing system Ball bearings Mass kg 0,240 All data are mean values at nominal conditions. Subject to change without notice ebm-papst St.Georgen GmbH & Co KG, Postfach 1435, D-78106 St. Georgen 3212J 2N 301.DOC 21.07.2006 Speed sensor /2 U s U s high t 1 t 2 U s low 1 Revolution U (+) I Source U s I Sink U bs R a GND U (+) Supply Voltage U Speed Signal s UU- bs slow R = U Sensor Supply Voltage a bs I sink GND Ground (-) Ra External Pull-Up Resistor Output 2 pulses per revolution U 4...30 V DC bs U 4...30 V DC at I = 0 mA s high source U <= 0,4 V DC at I = 2 mA s low sink I = 4 mA sink max t / t 0,8 - 1,2 1 2 ebm-papst St.Georgen GmbH & Co KG, Postfach 1435, D-78106 St. Georgen 3212J 2N 301.DOC 21.07.2006