Alpha Co. Ltd. has created new Dual Fin heat sink series, the UBD and ZD. The additional base side fins generate greater surface area and improve thermal performance.

The graph on the right displays the performance of a standard Z40-6B, and a ZD40-6B Dual Fin version of the same heat sink. At 1.2 m/s, the Dual Fin ZD40-6B's thermal resistance is 15% (0.62 C/W) lower than the standard Z40-6B. These heat sinks can be attached to PCB using Alpha's Z-Clip or QSZ Clip.

Initial shipment of these heat sinks is scheduled for October 2012.