This paper presents the engineering issues and development criteria utilized to evolve the Atlas Marx bank pulse power components. The power capacitor and rail-gap required alterations from existing designs to minimize system inductance and component count, maximize reliability and enhance maintainability. For the power capacitors, development has resulted in a plastic cased device with double ended bushings. The design of the capacitors' output electrodes, foil packs and internal interconnect webbing results in a capacitor with improved performance. The capacitors are rated at 33.5 uF and 60 kV and are housed in a 28"/spl times/29"/spl times/13" fiberglass case. Terminal inductance is less than 15 nH with a design discharge current greater than 650 kA.