Because of its high repetition rate and reliability, solid-state pulsed power generator is an important aspect of pulsed power technology. The solid-state switches play a critical role in this technology, and among them the magnetic switch stands out due to its long lifespan, high power capacity and free of maintenance. This manuscript delves into the key technologies and typical applications of magnetic switches. Furthermore, utilizing a field-circuit co-simulation model of magnetic switches, the manuscript analyzes the working characteristics of magnetic cores. The model includes processes like magnetic core saturation, interlamination electric field strength, and energy loss across various time scales. Additionally, the manuscript explores the influence of magnetic core geometry. Finally, it presents applications utilizing magnetic switch technology, such as compact solid-state high-power pulse generators and magnetic synchronization technology.