Interrupting apparatus for an electric current, comprising: - an interrupting block with separable contacts including at least one interrupting element , each interrupting element comprising a fixed electrical contact , a movable electrical contact which is displaceable in translation relative to the fixed electrical contacts between a closed position and an open position, and a linking member which is integral in translation with the movable electrical contact; - an actuating block comprising an actuator and a movable pallet coupled to the actuator; the interrupting apparatus further comprising a connection interface interposed between the interrupting block and the actuating block, the connection interface comprising a shaft and a support structure which is integral in translation with the movable pallet , the shaft being mounted so as to be pivotable about its longitudinal axis (X32) relative to the support structure , the shaft including at least one eccentric fixing element , each eccentric fixing element delimiting an internal receiver capable of receiving a head of one of the linking members , the interrupting apparatus being characterised in that the connection interface being switchable, by rotation of the shaft about its longitudinal axis (X32), between: - a locked state, in which the head of each linking member is held inside the internal receiver of one of the eccentric fixing elements in order to maintain the movable pallet integral in translation with each linking member , and - an unlocked state, in which the head of each linking member is freely displaceable in translation relative to said eccentric fixing element in order to uncouple the movable pallet from each linking member. - an interrupting block with separable contacts including at least one interrupting element , each interrupting element comprising a fixed electrical contact , a movable electrical contact which is displaceable in translation relative to the fixed electrical contacts between a closed position and an open position, and a linking member which is integral in translation with the movable electrical contact; - an actuating block comprising an actuator and a movable pallet coupled to the actuator; the interrupting apparatus further comprising a connection interface interposed between the interrupting block and the actuating block, the connection interface comprising a shaft and a support structure which is integral in translation with the movable pallet , the shaft being mounted so as to be pivotable about its longitudinal axis (X32) relative to the support structure , the shaft including at least one eccentric fixing element , each eccentric fixing element delimiting an internal receiver capable of receiving a head of one of the linking members , the interrupting apparatus being characterised in that the connection interface being switchable, by rotation of the shaft about its longitudinal axis (X32), between: - a locked state, in which the head of each linking member is held inside the internal receiver of one of the eccentric fixing elements in order to maintain the movable pallet integral in translation with each linking member , and - an unlocked state, in which the head of each linking member is freely displaceable in translation relative to said eccentric fixing element in order to uncouple the movable pallet from each linking member. <EOS>