Abstract: This is an innovative Over-Current Protection device that uses a unique method of controlling the energy to a compact tripping solenoid of a mechanical circuit breaker mechanism to cut off power to an electric circuit whenever the load current exceeds a specified level. Unlike previous Over-Current Protection devices, this device also maintains independent levels or stages of over-current protection and is able to distinguish between stages via independent current detection circuits that define the operational characteristics of each over-current stage. The device includes a current sensing transformer, independent current-threshold detectors, time delay circuits and a random phase, energy-accumulating circuit which generates a controlled trigger-pulse to trip the compact tripping solenoid of the mechanical circuit breaker mechanism. This device is also designed to connect directly onto, and operate in conjunction with, an existing GFCI (Ground Fault Circuit Interrupter) module.