An assembly comprising an electrical conductive member (250, 350, 450), an extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) at least in part defining a storage chamber containing a reactive charge reactable to produce reaction products, at least one electrical connector (30, 32) in reaction initiating communication with the reactive charge and a support housing (260, 360, 460) including a longitudinally extending bore (262, 362, 462), wherein the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) has at least one non-random fold (540a, 540b, 540c, 550c, 540d, 550d, 540e, 550e, 540f, 550f), wherein the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) is at least partially disposed within the bore (262, 362, 462), wherein the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) has a first length prior to reaction initiation of the reactive charge and, upon reaction initiation of the reactive charge, the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) longitudinally extends to a second length, wherein the second length is greater than the first length, wherein the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) when extended to the second length is able to act on the electrical conductive member (250, 350, 450) to electrically connect or disconnect or sever it, wherein the at least one electrical connector (30, 32) comprises a first conductive pin attached to a header body attached to the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) and a second conductive pin separate from the first conductive pin and attached to the header body, with one end of the first conductive pin positioned within an eyelet made of an insulating material for insulating the first conductive pin from the header body, the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) and the header body define the storage chamber, the pins (30, 32), the header body, the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f), the storage chamber and the reactive charge are part of an actuator device (20, 120, 220, 320, 420, 520a, 520b, 520c, 520d, 520e, 520f) which is disposed in the longitudinally extending bore (262, 362, 462) of the support housing (260, 360, 460), such that the support housing (260, 360, 460) maintains the actuator device (20, 120, 220, 320, 420, 520a, 520b, 520c, 520d, 520e, 520f) relative to the electrical conductive member (250, 350, 450), a close fit is provided in the bore (262, 362, 462) between the support housing (260, 360, 460) and an outer surface of a side wall of the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f), the inner diameter across the bore (262, 362, 462) is sized relative to the outer diameter of the outer surface of the side wall of the extendable initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) to eliminate lateral expansion of the outer surface of the side wall in the bore (262, 362, 462) upon reaction initiation of the reactive charge, wherein in the absence of the support housing (260, 360, 460), the extendible initiator cup (22, 122, 222, 322, 422, 522a, 522b, 522c, 522d, 522e, 522f) ruptures upon reaction initiation of the reactive charge.