Publisher Summary This chapter presents a research on the radiation effects of fast rise time (FREMP) toward radio fuse. The radio fuses under test are composed of high-frequency module, low-frequency module, and detonation-executing circuit. Its main technical parameters include emitting frequency, demodulation DC voltage, working current, and ignition sensitivity. To evaluate the storage security and working reliability of radio fuse under rigorous electromagnetic pulse (EMP) environment, radiation effects are studied when the sample is radiated by FREMP in different conditions. The electromagnetic field generated by FREMP radiation equipment is vertically polarized and radiates along horizontal direction in test space. Its rise/fall time is about 0.3ns and pulse width is about 4ns. The experiment shows that the FREMP field effect on the tested radio fuse is mainly caused by the electric field coupling to the samples, which can lead to false action for electronic modules and result in a mistaken explosion of executing-device.