High-voltage HEMP filters from API protects sensitive electronic equipment

Military Embedded Systems
API Technologies Corp. is now offering high-voltage High-Altitude Electromagnetic Pulse (HEMP) filters that are designed to protect sensitive electronic equipment for military and telecommunications applications.
http://mil-embedded.com/news/high-voltage-hemp-filters-from-api-protects-sensitive-electronic-equipment/ 

API Technologies Introduces Transient Energy Suppressant High Voltage HEMP Filters

Yahoo! Finance Canada
API Technologies Corp. (ATNY), a leading provider of high performance RF/microwave, power and security solutions for high-reliability applications, now offers high voltage HEMP (High-Altitude Electromagnetic Pulse) filters that protect sensitive electronic equipment from potentially destructive energy transients due to line surges, lightning, and electronic pulses.
https://ca.finance.yahoo.com/news/api-technologies-introduces-transient-energy-152600253.html