D2PAK or DDPAK - Double Decawatt Package

            

The Double Decawatt Package, or D2PAK or DDPAK is the successor to the DPAK package, which was designed by Motorola to encase discrete high-power devices.  The D2PAK is bigger than the DPAK, and comes in several versions with different terminal counts. The D2PAK, which has a flat heat sink at the back, is basically the surface-mount equivalent of the TO-220 through-hole package and is therefore sometimes referred to as 'SMD-220'.  The D2PAK is also known as 'TO-263'.

   

Figure 1.  Examples of the D2PAK

         

D2PAKs can have 3 to 9 terminals. The typical D2PAK body dimensions are shown in Table 1. The terminal pitch (distance between terminals) of a D2PAK is dictated by its terminal count, as shown in Table 1.

   

Table 1. Properties of Some Examples of D2PAKs

No. of Terminals

Body Size incl. heatsink

Body Thickness

Total Length incl. Leads

Terminal Pitch

3

400 mils x 390  mils

175 mils

600 mils

100 mils

5

400 mils x 390  mils

175 mils

600 mils

67 mils

7

400 mils x 390  mils

175 mils

600 mils

50 mils

     

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