switch 110 which is on and through overcurrent detector module 115 as long as the voltage drop across resistor 132 is less than voltage source 130 e g vcl 100 mv the output of op amp 127 will be low or at the voltage at node v in this keeps transistor 152 of control circuit 117 off and node v gate high which keeps switch 110 on an overcurrent condition is one where load 112 demands a much higher than normally expected current for example suppose that the current is so high that the voltage drop across resistor 132 is greater than 100 mv this causes the non inverting input of op amp 127 to become more positive than its inverting input note that the voltage differential across the non inverting and the inverting inputs occurs when a detected overcurrent condition is detected in this specific example an overcurrent is detected when the voltage drop across resistor 132 is greater than 100 mv or if greater than 10 amps of current flow through resistor 132 the threshold current which defines an overcurrent condition can be predetermined by setting voltage level of voltage source 130 accordingly upon detection of an overcurrent condition overcurrent detector module 115 causes the output of op amp 127 to go high or 12v this turns on transistor 152 to discharge capacitor 150 to the voltage at node v in this discharged of capacitor 150 vcl u02dc 0v causes switch 110 in switch 110 to turn off which results the disconnection of load 112 after switch 110 turns off the output of op amp 127 drops back down to 0v or the voltage at node v in.