Extruded Heatsink

An Extruded Heatsink uses the Extrusion manufacturing process where material is pushed through a die of the desired cross-section. A good video of the extrusion process can be found at this link. An Extruded Heatsink can have very complex cross-sections, and use materials that are brittle. The extrusion forms parts with an excellent surface finish, and are ideal for additional surface treatments such as Anodizing, or plating. Radian uses high thermal conductivity aluminum alloy A6063 200 W/(m-K) which most heatsink manufacturers do not use as it is "gummy" and difficult to work without without a good process recipe. A Extruded heatsink is suitable for high volume production as it has a relatively low NRE. The molds are typically made with an EDM wire machine, and the Tooling lead time is typically 4-6 weeks. The most cost effective when post machining is not required as additional CNC machining may relive the stress, causing misshape. This can be minimized by special thermal treatment to limit failures due to stress. Extruded Heatsinks offer both thin fins, and aspect ratios of ~8:1 which offers optimal heatsink performance.

Extruded Heatsink

Plate Fin Extruded Heatsink

Extruded HeatsinkOne of the most common type of Extruded Heatsink is the Platefin Extruded Heatsink which extracts heat by natural convection. An Extruded Platefin Heatsink uses straight fins that run the entire length to maximize the surface area of the heat sink. The heatsink can have additional machining to create a cross-cut which has a similar effect to an elliptical fin heatsink.

Standard Extruded Heatsink

DC Plate extruded heatsinkThe following list of Standard Extruded Heatsinks are usually available within a few days. These heatsinks are extruded, cut, and post machined then black anodized. As these standard extruded heatsinks have already been tooled, we can customize by increasing the fin length of the heatsink.

In addition, an extruded heatsink can have a fan added to create an active cooled heatsink.

PartTypeStyleMaterialLength (mm)Width (mm)Height (mm)Theta SA at 200LFMTheta SA at 400LFMTheta SA at 600LFMPart
HS1567EBPushpinPlatefinAluminum57.936.85.84.12.41.8View product
HS1568EBPushpinPlatefinAluminum57.936.811.42.21.31View product
HS1569EBPushpinPlatefinAluminum57.936.817.81.40.90.7View product
HS1570EBPushpinPlatefinAluminum57.936.822.91.20.70.5View product
HS1571EBPushpinPlatefinAluminum57.936.85.83.221.6View product
HS1573EBPushpinPlatefinAluminum57.936.817.81.10.80.6View product
HS1574EBPushpinPlatefinAluminum57.936.822.90.90.60.5View product
HS1575EBDCDCPlatefinAluminum6157.922.92.61.61.2View product
HS1576EBDCDCPlatefinAluminum6157.911.41.40.80.6View product
HS1577EBDCDCPlatefinAluminum6157.917.80.90.50.4View product
HS1578EBDCDCPlatefinAluminum6157.922.90.70.40.3View product
HS1579EBPushpinPlatefinAluminum6157.95.82.71.71.3View product
HS1580EBPushpinPlatefinAluminum6157.911.41.510.8View product
HS1581EBPushpinPlatefinAluminum6157.917.810.60.5View product
HS1582EBPushpinPlatefinAluminum6157.922.90.80.50.4View product
HS1591EBDCDCPlatefinAluminum116.8615.82.11.30.9View product
HS1592EBDCDCPlatefinAluminum116.86111.41.20.70.5View product
HS1593EBDCDCPlatefinAluminum116.86117.80.80.50.3View product
HS1594EBDCDCPlatefinAluminum116.86122.90.70.40.3View product
HS1595EBDCDCPlatefinAluminum116.8615.81.30.80.6View product
HS1597EBDCDCPlatefinAluminum116.86111.40.50.30.2View product
HS1598EBDCDCPlatefinAluminum116.86117.80.40.20.2View product

Standard BGA sizes
Custom Colors
Custom Designs

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