MOSFET failure & protection

[jalathar]

A P-channel MOSFET is currently used for switching the solenoid.

Case 1:
Is it possible for the MOSFET to fail?

Case 2:
If the MOSFET fails, will it become an open circuit or a short circuit?

Case 3:
If the MOSFET fails in short-circuit condition, how can the circuit be protected  

[Andrew Neil]

As @Peter BENSCH said, this sounds like just a generic electronics question - nothing to do with ST.

This is ST's forum; provided and run by ST for discussions about ST products - it's not a general electronics forum.

See this - which links to this.

PS:

It's far more effective to post a circuit diagram (aka schematic) than try to describe an electronic circuit in words.

[TDK]

Is this a school question or an interview question?

[jalathar]

In automotive application we used to switch the solenoid in starter motor .

[Andrew Neil]

@jalathar you didn't answer the question!

[jalathar]

This is circuit diagram 

[Andrew Neil]

That wasn't the question - was it?

Both @TDK and @Peter BENSCH have asked you whether this is a school or interview question.

You don't seem to be using any ST products?

[Peter BENSCH · Accepted solution]

It is not about components from STMicroelectronics, but to help the TO, here is a suggestion for where could insert the fuse mentioned: between drain/R4 and D2/SL.