relay MOSFET short circuit protection

[yassin.kraouch]

Hi,

i am a bit confused on short circuit protection, i don't know how to do this, i have to use relay or MOSFET, i don't know how this circuit will work and, which is the best,

best regards

 

[srizbf]

you have to tell more about your intended application and the circuit diagram be shown.
then any suggestion from members can come.

 

[yassin.kraouch]

just want to have a general idea about the difference between MOSFET and relay,

 

[srizbf]

a mosfet can act like a relay.(switch--on/off)
relay has more time delay than mosfet.
but relay can switch higher current than mosfet , with less cost.

you require appropriate circuitry for mosfet to switch.

there are many more... but these are few .

what is your intended application ?

 

[Zanderist]

MOSFET's suffer from field effect(I don't think this is the right term), the capacitance of your skin could activate the circuit when you touch it.

 

[yassin.kraouch]

i will use this protection in a car, for example if light are short circuit then the supply voltage should protect the circuit

 

[umesh49]

If this is only for over current protection during short and temp requirement is less than 85C then you can search for a ressetable fuse, else use a P-type FET with gate to be controlled by some over current protection circuit.

 

[sanju_]

hi refer both posts once

https://www.edaboard.com/threads/31423/
https://www.edaboard.com/threads/43476/

 

[Zanderist]

hi refer both posts once

https://www.edaboard.com/threads/31423/

I just wanna say that using a mosfet for that case isn't such a great idea if your around radios (walkie talkies) that might turn it on if it's not properly sheildied.