Abstract: Modular detonator device for use in series array line detonations. The detonator device comprises a case, a coupler and a base. A first electrical contact is disposed on the base and is coupled through an exploding bridgewire and the coupler to the case, where the external wall of the case comprises a second electrical contact of the device. The device may be battery-like in external configuration to facilitate end-to-end placement of a multiplicity of the device in a practically infinite series array, with external wiring necessarily being connected only to the lead and the trailing end of such series array.