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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 1y ago by kellogs‭  ·  last activity 1y ago by Lundin‭

Question MOSFET transient-protection TVS
#1: Initial revision by user avatar kellogs‭ · 2023-05-10T19:38:55Z (over 1 year ago) 
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