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TO-263AA front view

TO-263AA back view

3D model of TO-263AA package

The Double Decawatt Package,^[1][2] D2PAK, SOT404 or DDPAK, standardized as TO-263,^[3] is a semiconductor package type intended for surface mounting on circuit boards. The TO-263 is designed by Motorola.^[1][2] They are similar to the earlier TO-220-style packages intended for high power dissipation^[2][4] but lack the extended metal tab and mounting hole, while representing a larger version of the TO-252, also known as DPAK, SMT package. As with all SMT packages, the pins on a D2PAK are bent to lie against the PCB surface. The TO-263 can have 3 to 7 terminals.^[1][2]

• 
  A pair of MOSFETs in the surface-mount package D2PAK.
• 
  A TO-220 package compared to a D2PAK package.

Texas instruments has a smaller version of the TO-263: the TO-263 THIN. The height of the TO-263 THIN is 2 mm instead of the standard 4.5 mm.^[2][5]

• TO-220, through hole version of the TO-263^[1][2]

Wikimedia Commons has media related to TO-263 transistor packages.

• Package information from Fairchild
• Mechanical drawings from National Semiconductor
• Mechanical drawings of D2PAK from ON Semiconductor

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