Standards - Fabfin Heat Sinks for IGBT & High Power Devices - Mechanically Bonded (Swaged)

FABFIN Standards - Various Widths Available in Serrated or Corrugated Fins

FFC Series with Side Fastened Legs and Fan Brackets
The R-Theta® range of standard Fabfin® forced convection cooled heat sinks (FFC series) was developed to incorporate standard 119mm square axial fans. The fin spacing of 8.51 mm was selected to provide a 20:1 ratio, the practical heat transfer limit for cooling Power Semiconductors in typical ambient conditions. The standard FFC series shown will accept 1, 2, 3 or 4 (not shown) fans. Available in many finishes.

The serrated fin thickness of 2.4mm provides near optimum performance when using industry standard axial fans. If some level of performance de-rating is acceptable (approximately 20%) then we recommend that corrugated fins be used. These have a thickness of 1.5 mm and are designated by ordering the ‘AC’ part numbers. The use of corrugated fins provides a weight savings of approximately 15% and will increase surface area by 7% compared with a straight fin of the same height.

The push/pull (PP) option is common for applications where fan redundancy is important. We recommend the use of ball bearing fan(s), specifically for the “pull” end, in order to maximize the fan life due to the elevated operating temperatures. The additional weight of the fan can be offset by using the corrugated fins, if applicable.

The adjacent graphs provide a performance guide for heat generating devices ranging in size from point source to 60% coverage.

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