TO-252 (DPAK) Component Package
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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. In the “DPAK” range there is also the larger TO-263 (D2PAK) and TO-268 (D3PAK) offering higher power dissipation ratings.
All TO-252 packages have a pitch of 1.27mm (50mill). TO-252’s are quite easy to hand-solder, although the large tab can make things difficult because of it’s heatsinking capabilities.
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. not DPAK3, DPAK5), it is usually referring to the 3-pin version (TO-252-3).
Similar To
- TO-220: The through-hole package that the TO-252-3 was designed to replace (obviously not pin compatible!).
- TO-263 (D2PAK): The TO-263 (D2PAK) is the next step up in power dissipation from the TO-252-3 package.
- TO-268 (D3PAK): The TO-268 (D3PAK) is the next step up in power dissipation from the TO-263 (D2PAK) package.
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:
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:
Synonyms
KVU (R-PSFM-G5)
: Used by Texas Instruments as a drawing number5.TO-252-5
: Sometimes this package is just calledTO-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-P1
7. 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
onsemi (2020, Aug). Schottky Power Rectifier, Switch-Mode, 10 A, 45 V - MBRB1045G, MBRD1045G, SBRB1045G, SBRD81045T4G [Datasheet]. Retrieved 2023-07-19, from https://www.onsemi.com/pdf/datasheet/mbrb1045-d.pdf. ↩︎
Rohm Semiconductor (2011). RB085B-40FH - Schottky barrier diode [Datasheet]. Retrieved 2023-07-19, from https://fscdn.rohm.com/en/products/databook/datasheet-nrnd/discrete/diode/schottky_barrier/rb085b-40fh.pdf. ↩︎
Nexperia (2022, May 20). SOT428 - plastic, single-ended surface-mounted package (DPAK); 3 leads; 2.285 mm pitch; 6 mm x 6.6 mm x 2.3 mm body [Package Information]. Retrieved 2023-07-19, from https://assets.nexperia.com/documents/package-information/SOT428.pdf. ↩︎ ↩︎ ↩︎
Diodes Inc. TO-252-5 [Package Overview]. Retrieved 2023-07-19, from https://www.diodes.com/package/view/400.info. ↩︎
Texas Instruments (2021, Apr). TPS7B87-Q1 - 500-mA, 40-V, Low-Dropout Regulator With Power-Good [Datasheet]. Retrieved 2023-07-19, from https://www.ti.com/lit/ds/symlink/tps7b87-q1.pdf. ↩︎
Diodes Inc (2017, April 4). TO-252-5 [Package Information]. Retrieved 2023-17-19, from https://www.diodes.com/assets/Package-Image/TO252-5.pdf. ↩︎ ↩︎
Nisshinbo Micro Devices Inc. TO-252-5-P2 [Package Information]. Retrieved 2023-07-19, from https://www.nisshinbo-microdevices.co.jp/en/design-support/package/to-252-5-p2.html. ↩︎ ↩︎
Authors
This work is licensed under a Creative Commons Attribution 4.0 International License .
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