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Q&A MOSFET protection with TVS: at the source pin or at the drain pin

In the auotmotive context, does it matter where the fat load-dump grade diode is placed in relation to the MOSFET so as to protect it from both fast positive transients and the longer load dump ? ...

2 answers · posted 2y ago by kellogs‭ · last activity 2y ago by Lundin‭

Question MOSFET transient-protection TVS

#1: Initial revision by

kellogs‭ · 2023-05-10T19:38:55Z (almost 2 years ago)

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MOSFET protection with TVS: at the source pin or at the drain pin

In the auotmotive context, does it matter where the fat load-dump grade diode is placed in relation to the MOSFET so as to protect it from both fast positive transients and the longer load dump ? 

Thank you

![Image diagram](https://electrical.codidact.com/uploads/oz4tyxp0rijnfyy1zsfmyn5rnrhi)

MOSFET transient-protection TVS

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