Short Circuit or Over Current Protection Circuit using a MOSFET

This Short Circuit and Over Current Protection Circuit using a MOSFET is a fast and automatic way to protect the electronic devices or circuits from excessive current draw or accidental short circuits. The circuit consist of MOSFET, it is used as a high speed switch, so the circuit can instantly detect the abnormal current levels and disconnecting the load before damage occurs.

Power supplies commonly face two dangerous faults,

• Short Circuit – Output terminals accidentally short together
• Over Current – Load draws more current than the safe limit

Short Circuit and Over Current Protection Circuit

This circuit provides automatic disconnection during such events using a simple and low cost design based on LM358 op amp and IRF540 MOSFET.

The Short circuits and over current conditions can severely damage your power supply, load or wiring. To avoid these issues. So reliable protection circuit is essential to stop this. The given circuit shown above uses a current sensing resistor, an op amp comparator and a IRF540 N channel MOSFET switch to disconnect the load during excessive current flow.

Components Required

In this way we can save low power loss also get a quick response time to turn off the circuit and check the issue. This circuit designed in simple integration with few electronic components. The circuit working in battery powered systems, power supplies and sensitive electronic equipment used in DC supply.

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