# How to specify Diode resistance and Diode forward drop in thermal modelling of MOSFET with Diode?

**URL:** https://forum.plexim.com/t/how-to-specify-diode-resistance-and-diode-forward-drop-in-thermal-modelling-of-mosfet-with-diode/685
**Category:** PLECS
**Tags:** thermal-model
**Created:** [August 20, 2019, 4:20am UTC](https://forum.plexim.com/t/how-to-specify-diode-resistance-and-diode-forward-drop-in-thermal-modelling-of-mosfet-with-diode/685 "2019-08-20T04:20:48Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Pallavi](https://avatars.discourse-cdn.com/v4/letter/p/3be4f8/32.png) [@Pallavi](https://forum.plexim.com/u/Pallavi)
#### Post date: [August 20, 2019, 4:20am UTC](https://forum.plexim.com/t/how-to-specify-diode-resistance-and-diode-forward-drop-in-thermal-modelling-of-mosfet-with-diode/685/1 "2019-08-20T04:20:48Z")

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On resistance Ron in attached figure is for diode or MOSFET?

 ![MosfetwithDiode.PNG](https://europe1.discourse-cdn.com/flex006/uploads/plecs/original/1X/69c87dbff46f40507b96e3861d1161a654be6f87.png)

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### Author: ![Kris\_Eberle](https://dub1.discourse-cdn.com/flex006/user_avatar/forum.plexim.com/kris_eberle/32/6_2.png) [@Kris\_Eberle](https://forum.plexim.com/u/Kris_Eberle)
#### Post date: [August 20, 2019, 1:34pm UTC](https://forum.plexim.com/t/how-to-specify-diode-resistance-and-diode-forward-drop-in-thermal-modelling-of-mosfet-with-diode/685/2 "2019-08-20T13:34:13Z")

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Hello,

This component only allows you to specify the device on-resistance in the on state (conducting in either direction). To include Vf\_diode, Ron\_diode, or to model current sharing during reverse conduction, you will need to use separate MOSFET and diode components.

Regards,

Kris