Abstract: The present invention provides a semiconductor integrated circuit for detecting leakage current to determine whether an electric leakage occurs in an electric line based on an induced voltage input from a leakage current detection unit 20 installed in the electric line, and an earth, leakage circuit breaker having the semiconductor integrated circuit. A semiconductor integrated circuit 100 for detecting leakage current includes: a signal amplification unit 110 configured to amplify the induced voltage; an interruption determination unit 130 configured to compare an output voltage output from the signal amplification unit with a preset reference voltage, and output an interruption signal for interrupting a power supply to the electric line; a flare current stabilization (FCS) circuit 150 for a signal amplification unit connected to the signal amplification unit; and a flare current stabilization (FCS) circuit 170 for an interruption determination unit connected to the interruption determination unit.

Abstract: A semiconductor integrated circuit for leak current detection which outputs an interruption signal to cut off electrical power supplied by a power supply to an electric line if a leakage current occurs including a leakage current processing unit and an output unit configured to output the interruption signal. The leakage current processing unit includes: a zero-power supply voltage detector; a counter when the power supply voltage pulse signal is input; a zero-input induction voltage detector configured to output a leakage current pulse signal whenever the input induction voltage becomes 0 V; a counter latch configured to latch a count value supplied by the counter and output the latched count value; an output induction voltage setting unit configured to calculate an output induction voltage; and a comparator configured to compare the output induction voltage with a predetermined trip level.