Electromagnetic pulse (EMP), also sometimes called a transient electromagnetic disturbance, is a short burst of electromagnetic energy. Such a pulse's origin may be a natural occurrence or man-made and can occur as a radiated, electric, or magnetic field or a conducted electric current, depending on the source.WEMC HEMP filters are designed and manufactured according to Mil-Std-188-125-1, with experience from more and more projects, HEMP filters of WEMC would always meet requirements from customers, no matter commercial or military projects.