TO-252 Component Package

Overview

TO-252 (JEDEC Transistor Outline 252) is family of SMD component packages that is commonly used for things such as medium power MOSFETs and linear power regulators. There is a popular 3-lead variant also known as DPAK, along with 2 less commonly used 5-lead variants. All TO-252 packages have a pitch of 1.27mm (50mill).

Similar To:

• TO-220

Solderability: Quite easy to hand-solder, although the large tab can make things difficult because of it’s heatsinking capabilities.

Commonly used for power MOSFETs 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.

TO-252-3

The TO-252-3 is the 3-lead variant in the TO-252 family, most commonly known by the synonym DPACK. ERROR: fig-to-252-component-package-3d-render REF NOT FOUND shows a 3D render of this package.

Synonyms:

• Case 369C: Used by On Semiconductor¹.
• CPD: Used by Rohm Semiconductor².
• DPAK: Popular alternative name.
• DPAK3: A version of DPAK but with a 3 to distinguish it from the 5-lead version.
• SC-63: The JEITA EIAJ standard name³.
• SOT-428: Used by Nexperia³.
• TO-252: Strictly this is a family of packages, but if no suffix is mentioned it’s typically referring to TO-252-3³.
• TO-252AA: JEDEC name.

3D Models:

• DPAK, TO-252AA, by Bill Brooks

Thermal resistance:

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

TO-252-5-P1

The TO-252-5 is the 5-lead variant in the TO-252 family with a square a shorter tab than the TO-252-5-P2. It is not as common as the 3-lead variant. Most of the time the middle lead (3rd lead) is cut short in this variant, as it’s electrically connected to the tab.

3D Model

ERROR: fig-to-252-5-p1-3d-model-diodes-inc REF NOT FOUND shows a 3D model for this component package.

You can download 3D models from:

• DPAK-5, by Alexey Olehnovich

Synonyms

• KVU (R-PSFM-G5): Used by Texas Instruments as a drawing number⁵.
• TO-252-5: Sometimes this package is just called TO-252-5.

Dimensions

ERROR: fig-to-252-p1-package-dimensions-diode-inc REF NOT FOUND shows the dimensions of the TO-252-5-P1 package from Diodes Inc.

Recommended Land Pattern

ERROR: fig-to-252-p1-recommended-land-pattern-diode-inc REF NOT FOUND shows the recommended land pattern of the TO-252-5-P1 package from Diodes Inc.

Thermal Resistances

The thermal resistances for any TO-252-5 package are shown below.

• \(T_{JA} = 59^{\circ}{\rm C}/W\) (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)

TO-252-5-P2

The TO-252-5-P2 is a 5-lead variant of the TO-252 package with a rounded and longer tab than the TO-252-5-P1⁷. If there is no suffix listed on a TO-252-5 package (e.g. no mention of P1 or P2), it will likely be this variant. ERROR: fig-to-252-5-p2-3d-render-nisshinbo REF NOT FOUND shows a 3D render of this package.

Recommended Land Pattern

ERROR: fig-component-package-to-252-5-recommended-land-pattern REF NOT FOUND shows a recommended land pattern from Ricoh for the TO-252-5-P2.

References