Abstract: An overcurrent breaker switch includes an upper housing including a lever block with a push rod and a lower housing engaged with the upper housing. First and second blades are mounted to the lower housing, the second blade having a dual metal plate mounted thereon. A lever plate base is mounted in the lower housing and has a first end for releasable electrical connection with the dual metal plate and a second end. A conductive lever plate is pivotally mounted to the second end of the lever plate base and actuatable by the push rod under operation of the lever block. The conductive lever plate has a first end for releasable electrical connection with the first blade and a second end on which a pressing piece is formed. An insulating plate is mounted between the lever plate base and the dual metal plate and has an insulating piece below the pressing piece of the conductive lever plate. A spring is mounted under the insulating piece to provide an upward force.