D2PAK

What’s D2PAK?

 

The Double Decawatt Package, D2PAK, SOT404, or DDPAK, standardized as TO-263, refers to a semiconductor package type intended for surface mounting on printed circuit boards (PCBs). The TO-263 is designed by Motorola. They are similar to the earlier TO-220-style packages intended for high power dissipation 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.

 

TO-263 (D2PAK) and TO-252 (DPAK)

 

The most common package for through-hole MOSFET devices, as well as many voltage regulators, is the TO-220, which is commonly installed with an accompanying heat sink. The surface mount equivalents of this package are the TO-263 and the TO-252, also known as D2PAK and DPAK. These packages incorporate large pads on their underside specifically for the purpose of heat dissipation, with separate heat sinks available. DPAK components are commonly rated for 50W power dissipation, with D2PAK parts commonly rated at 100W. These packages are no trouble for us at MADPCB, and we recommend that customers select these packages as often as possible in place of the through-hole variant.

 

The typical body dimensions are shown in following table. The terminal pitch (distance between terminals) of Double Decawatt Package is dictated by its terminal count.

Properties of Some Examples of DDPAKs
No. of Terminals	Body Size incl. heatsink	Body Thickness	Total Length incl. Leads	Terminal Pitch
3	400 x 390  mils	175 mils	600 mils	100 mils
5	400 x 390  mils	175 mils	600 mils	67 mils
7	400 x 390  mils	175 mils	600 mils	50 mils