This project aimed to further develop a Switch Mode Power Supply design used in Electric Actuators for Valve control. The methodology applied was a combination of experimental and quantitative studies focusing on key aspects of the Power supply such as the EMI filter, Full-bridge rectifier, Bulk Capacitance, Flyback controller circuits and MOSFET switching. The two primary goals was optimize for Inrush Currents and to research ways to reduce Conducted Emissions to pass certification testing under DNVGL-CG-03339 (Environmental test specification for electrical, electric and programmable equipment and systems). As the reference design revealed insignificant inrush current for single and multiple units in action, a bulkier capacitor was proposed. Not only did an increase in capacitance reduce ripple voltage by flattening rectified voltage from the full-bridge rectifier, but yielded positive secondary effect on the MOSFET switching. Under non existing flattening, the flyback controller experienced drop-outs resulting in lost potential efficiency. The proposed change effectively optimized the inrush current with respect to minimum fuse characteristics and further improves the overall efficiency of the power supply. Furthermore the project concluded by proposing a new EMI filter design that showed significant reduction in Conducted emission within the bandwidth of the certification testing from SPICE simulation and physical testing.