I would like to identify a POWER MOSFET. It has the following print on the housing: 80NF03 - 04@ GKL68 V6 CHN 740

[Tesla DeLorean · Accepted solution]

Likely STB80NF03L-04

https://www.st.com/resource/en/datasheet/stb80nf03l-04t4.pdf

[Tesla DeLorean]

Dupe @Camilo LEMOS​ can't these just be moved or retopiced? These are supposedly ACTIVE status parts https://www.st.com/en/power-transistors/stb80nf03l-04t4.html

https://community.st.com/s/question/0D53W00001Ei07BSAR/i-would-like-to-identify-a-power-mosfetit-has-the-following-print-on-the-housing80nf03-04gkl68-v6chn-740

[Peter BENSCH]

The part is still active, as @Community member noted, so moved from Discontinued Products to Power Management.

Regards

/Peter

[GGelb.1]

Thks for the answers!

The refered MOSFET has a D²PAK housing.

My "MOSFET" has a TO-220 housing. I guess I have another product :\

[Peter BENSCH]

Please check again whether the marking is really 80NF03 - 04@, or maybe 80NF03L-04@, i.e. with the letter L after 03?

If you have a TO-220, then it's the former STP80NF03L-04, whose MOSFET chip inside is essentially identical to the D2PAK variant.

Regards

/Peter

[GGelb.1]

Yes it has indeed a L 03L

Another question: I would like to solder the MOSFET to a cooler. I do not have a thermally conductive paste.

Are there any big doubts?

[Peter BENSCH]

If you are soldering the MOSFET onto a heat sink without insulation, you need to take into account that the heat sink has the same electrical potential as the drain of the MOSFET. The TO-220 is actually not intended for soldering, but if you really want to solder the MOSFET, you should do it over the entire area of the tab so that the resulting thermal resistance is as low as possible.

When fastening with a screw, the thermal resistance will naturally increase to a greater or lesser extent without thermal paste, so a given load will result in a higher temperature of the MOSFET. In this case, you can influence this with the appropriate torque (typically 0.55Nm, max 0.7Nm).

Regards

/Peter