747652F00000G

DATASHEET EXTRUSION PROFILE 74765 74765 PRODUCT DETAILS Property Details Height 1.02 in (25.91 mm) Width 4.24 in (107.7 mm) Perimeter USA: 1.855.322.2843 EUROPE: 39.051.764002 ASIA: 86.21.6115.2000 x8122 50.53 in Weight 2.4 lbs per foot (3.57 kg per meter) Material 6063-T5 Aluminum Extrusion Alloy Extrusion Profile 74765 www.aavid.com November 2016 A02 DATASHEET EXTRUSION PROFILE 74765 THERMAL DATA Natural Convection: 1.38 based on 70 C temp rise above ambient. Thermal resistance is calculated based on a single 1" (25.4mm) square heat source centered on the heat sink. If you have distributed loads, then you can expect 10% better performance in natural convection and 20% better performance in forced convection. Natural Convection Heat Sink Temperature Rise Above Ambient Heat Sink Thermal Resistance 45.0 5.00 33.8 3.75 22.5 2.50 11.2 1.25 0.0 0.00 2.5 7.5 12.5 17.5 22.5 2.5 Power Dissipated (W) 7.5 12.5 17.5 22.5 Power Dissipated (W) Forced Convection Heat Sink Temperature Rise Above Ambient (25W Dissipated) Heat Sink Thermal Resistance Air Flow (m/s) Air Flow (m/s) 1.0 2.0 3.0 4.1 5.1 1.0 25.0 1.00 18.8 0.75 12.5 0.50 6.2 0.25 0.0 0.00 200 400 600 Air Flow (LFM) USA: 1.855.322.2843 EUROPE: 39.051.764002 ASIA: 86.21.6115.2000 x8122 800 1000 2.0 200 3.0 400 4.1 600 5.1 800 1000 Air Flow (LFM) Extrusion Profile 74765 www.aavid.com November 2016 A02