IP68 DC axial fans RATING Series 630 U 60 x 60 x 25 mm Speed Temperature range Mass Ingress Protection Rating UL Approval Curves 1.8 5900 -20...70 70 IP68 Yes 1 5.1 Yes 1.6 5900 -20...70 70 IP68 Yes 1 5.4 Yes 1.5 6300 -20...70 70 IP68 Yes 2 6.1 Yes 3.2 8500 -20...70 70 IP68 Yes 3 Type CFM VDC VDC dB(A) Bel(A) 632 NU 23.5 12 6...15 34 5.1 634 NU-004* 23.5 24 12...30 34 632/2HPU 25.9 12 11...13 35 634 HHU 34.1 24 18...28 44 Nominal Data Ball bearings Yes Sound power level g Sound pressure level oC Voltage range RPM Nominal voltage Watts Air flow Power input Highlights: - Motor protection against reverse polarity and locking. - Air exhaust over struts - Connection via 310 mm strands AWG 22, TR 64, bared and tin-plated - Ingress protection rating of IP68 Material: Housing: Fiberglass-reinforced PBT composite Impeller: Fiberglass-reinforced PA composite Direction of rotation: Clockwise, seen on rotor [in. H2O] Curves 3 .3) 5.40 1.0 (2 0.7 0.24 0.6 0.2) 0.2) 0.12 (3 0.12 (3 (61) 2 0.4 1 1.97 (500.2) 2.28 (58) 310 (12.2)* 0.5 O2.52 (64) 0.3 0.2 1.97 (500 .2) 2.36 (600 .3) p 0.1 0.0 * 0 V 7 5 10 15 20 25 30 35 [CFM] *634 NU-004 has 400mm lead wires. 0.17 0.17 (4.3 0.15) (4.3 0.15)