DPACK Component Package


  • Case 369C (On Semiconductor’s name for the TO-252AA)
  • CPD (Rohm Semiconductor)
  • SC-63 (JEITA, EIAJ)
  • SOT-428
  • TO-252 (JEDEC Transistor Outline 252)
  • TO-252AA (only applies to DPAK3 (TO-252-3))
  • DPAK3 (TO-252-3, TO-252AA)
  • TO-252-5-P1 (5-pin, square and short tab)
  • TO-252-5-P2 (5-pin, rounded and longer tab). If there is no suffix listed, it will likely be this variant.
Similar To TO-220AB
Mounting SMD
Pin Count
  • 3 (DPAK)
  • 5 (TO-252-5)
Pitch 1.27mm (50mill)
Solderability Quite easy to hand-solder, although the large tab can make things difficult because of it’s heatsinking capabilities.
Thermal Resistance

TO-252-3 (DPAK)

  • \(T_{JA} = 80^{\circ}{\rm C}/W\) (pads only, no copper fill)

TO-252-5-xx (both P1 and P2 suffixes)

  • \(T_{JA} = 59^{\circ}{\rm C}/W\) (pads only, no copper fill)
  • \(T_{JA} = 26^{\circ}{\rm C}/W\) (high-wattage land pattern)
  • \(T_{JA} = 20^{\circ}{\rm C}/W\) (one square inch of copper surrounding package, connected to ground)
  • \(T_{JA} = 7^{\circ}{\rm C}/W\) (high-wattage land pattern with thermal vias to bottom layer)
Dimensions n/a
3D Models
Common Uses
  • MOSFET’s
  • Linear voltage regulators


Commonly used for power MOSFET’s and high power voltage regulators. Features a large tab/pin which can be soldered directly onto the PCB, providing good heatsinking capabilities.

If DPAK is referred to by itself, with no pin number indication (e.g. DPAK3, DPAK5), it is usually referring to the 3-pin version.

3D Renders

A 3D render of the TO-252 component package.
A 3D render of the TO-252 component package.

Other Images

component-package-to-252-5-recommended-land-pattern The recommended PCB land pattern for the TO-252-5 component package. Image from Ricoh TO-252 Package Information (http://www.ricoh.com/LSI/product_power/pkg/to-252-5-p2.pdf).
to-252-3d-model 3D model of the TO-252 (DPACK) package.