A rotatable blade carrier assembly for an interrupter module of a molded case circuit breaker , comprising: a blade assembly having two conductive blades , each conductive blade including a movable electrical contact configured to engage a corresponding stationary electrical contact of an interrupter module in a closed position and to disengage from the corresponding stationary contacts in an open position, each of the two conductive blades having an independent over travel and contact force to maintain contact between the movable electrical contacts and corresponding stationary electrical contacts in the closed position; a rotatable carrier for the blade assembly, the two conductive blades mounted in the carrier to pivot in relation to one another; and a separate extension spring for each of the conductive blades; and a pivot pin for each conductive blade of the blade assembly, wherein the two conductive blades are movably connected together at an opposite end from the movable electrical contacts , characterised in that the rotatable carrier further comprises a cam surface and a fixed pin for each conductive blade , the two conductive blades together further being rotatably mounted in the carrier such that the pivot pin of each conductive blade cams against a corresponding one of the cam surfaces of the carrier to control movement of the conductive blades between the closed position and the open position, the open position comprising also a blown open position; and in that the extension spring for each of the conductive blades is connected between the pivot pin and the fixed pin for the corresponding conductive blade , and controls the over travel and contact force of the corresponding conductive blade . a blade assembly having two conductive blades , each conductive blade including a movable electrical contact configured to engage a corresponding stationary electrical contact of an interrupter module in a closed position and to disengage from the corresponding stationary contacts in an open position, each of the two conductive blades having an independent over travel and contact force to maintain contact between the movable electrical contacts and corresponding stationary electrical contacts in the closed position; a rotatable carrier for the blade assembly, the two conductive blades mounted in the carrier to pivot in relation to one another; and a separate extension spring for each of the conductive blades; and a pivot pin for each conductive blade of the blade assembly, a separate extension spring for each of the conductive blades; and a pivot pin for each conductive blade of the blade assembly, wherein the two conductive blades are movably connected together at an opposite end from the movable electrical contacts , characterised in that the rotatable carrier further comprises a cam surface and a fixed pin for each conductive blade , the two conductive blades together further being rotatably mounted in the carrier such that the pivot pin of each conductive blade cams against a corresponding one of the cam surfaces of the carrier to control movement of the conductive blades between the closed position and the open position, the open position comprising also a blown open position; and in that the extension spring for each of the conductive blades is connected between the pivot pin and the fixed pin for the corresponding conductive blade , and controls the over travel and contact force of the corresponding conductive blade . <EOS>