Current Limiter Circuit Mosfet. R1 35 0 7 30 2 5 410 ohms wattage for the above resistor would be p v2 r 35 x 35 410 2 98 or 3 watts. This video provides a tutorial on how to implement a p channel mosfet current limiting circuit more information is available at.
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Mosfets are usually not designed to operate in their linear region they are mostly switching devices. Connect the current limiter in series between the component that you wish to limit its current and the voltage source. A simple widely used current limiter consists of a current sensor usually a low value sense resistor a control circuit and a pass transistor.
After that it should get out of the way as much as possible.
However this simple circuit has a limitation. Purpose is to design current limiting circuit that will actively limit load current regardless of load resistance. Also important is lowest power dissipation in limiting device. Pmbus uninterruptible power supply.
