protection circuit(surge as wel as reverse polarity)

[Dimpi]

please help me designing a protection circuit in which surge protection as wel as mosfet based reverse polarity protection is included...the maximum current that the device can handle is 2 ampere and the voltage that it can handle is 10V-40V.so accorsingly please specify the fuse specifications and zener diode specifications..how to find the part number of fuse???please rply

 

[nishu's]

please help me designing a protection circuit in which surge protection as wel as mosfet based reverse polarity protection is included...the maximum current that the device can handle is 2 ampere and the voltage that it can handle is 10V-40V.so accorsingly please specify the fuse specifications and zener diode specifications..how to find the part number of fuse???please rply

what sort of solution do you seek.
micro-controller or discrete component based?
surge is for current or voltage in rush?

 

[Dimpi]

what is the meaning of term in rush??surge protection m planning is for the discrete components...the device m planning gets its power supply from 10 v adapter and so m trying to design a protection circuit firstly surge nd den reverse polarity protection.

 

[nishu's]

In rush current is related to excessive current requirement of circuit for a short period of time specifically refers to the startup current required by a circuit and is normally several times higher than steady state current requirement of circuit, like while switching on a dc circuit capacitors present gets charged first so power has to supply higher current for a short period of time.

Reverse polarity protection: disconnect circuit negative from power supply negative. Place any NMOS with low Rds-on rated for 10A (P55NF06 OR IRF3205) and attach its source side to power supply negative and drain side to circuit negative with gate attached to power supply + terminal, LED_1 is reverse battery indicator, refer to image attached.

https://obrazki.elektroda.pl/6586761900_1379414619.jpg

 

[Dimpi]

thank u nishu..but 1 thing i am designing a device which will be covered overall(m designing a gps gsm based tracking device),so dont u think the use of LED is unnecessary...it wl increase the cost.