Abstract: An initiator assembly for use with an assembly for use in a vehicular safety restraint installation such as in an airbag inflator or micro-gas generator is provided. The initiator assembly includes an integral, one-piece insert member that is injection molded with insulating material to an initiator. The insert member suitably engages a housing of the assembly for properly holding the initiator assembly in place relative to the housing both before and after the initiator is activated. The insulating material defines a receiving portion for receiving a shorting element. The shorting element creates a short circuit between a pair of initiator electrical terminals. The insulating material further defines an interface having a keyed mating portion for receiving a correspondingly shaped electrical connector in electrical contact with the electrical terminals.